Updated on 2021/09/24

写真a

 
ASAHARA, Yoshihiro
 
Organization
Graduate School of Environmental Studies Department of Earth and Environmental Sciences Geochemistry and Cosmochemistry Associate professor
Graduate School
Graduate School of Environmental Studies
Undergraduate School
School of Science Department of Earth and Planetary Science
Title
Associate professor
Contact information
メールアドレス

Degree 1

  1. Doctor of Science ( 1999.9   Nagoya University ) 

Research Interests 17

  1. geochemistry

  2. chemistry

  3. mass spectrometry

  4. geochronology

  5. tracer

  6. isotope

  7. geoenvironment

  8. paleoenvironment

  9. sediment

  10. environment

  11. marine

  12. resource geology

  13. mineral deposit

  14. igneous rock

  15. archaeology

  16. concrete

  17. geological disposal

Research Areas 3

  1. Environmental Science/Agriculture Science / Environmental dynamic analysis  / Environmental Dynamic Analysis

  2. Natural Science / Space and planetary sciences  / Earth Astrochemistry

  3. Energy Engineering / Earth resource engineering, Energy sciences

Current Research Project and SDGs 6

  1. 堆積物の同位体を利用した古環境解析

  2. 韓半島基盤岩の希土類元素に着目した同位体地球化学的研究

  3. 西アジア・ザグロス造山帯の火成岩および鉱床の同位体地球化学的研究

  4. 同位体を利用した堆積岩の形成環境の推定

  5. 岩盤の割れ目形成年代の測定法の開発

  6. 放射性炭素を用いたコンクリートの中性化進行速度推定法の開発

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Education 2

  1. Nagoya University   Graduate School, Division of Natural Science   Department of Earth Sciences

    1992.4 - 1994.3

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    Country: Japan

  2. Kobe University   Faculty of Science   Department of Earth Sciences

    1988.4 - 1992.3

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    Country: Japan

Professional Memberships 6

  1. The Geochemical Society of Japan

    2021.9 - 2023.9

  2. The Geochemical Society of Japan

    2019.9 - 2021.9

  3. The Geochemical Society of Japan

    1993.1

  4. The Oceanographic Society of Japan

    2008.4

  5. Society for the Studies of Paleo-Geosciences (PALEO10)

    2012.9

  6. Japan Geoscience Union

    2016.4

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Papers 103

  1. Geochronology and petrogenesis of the Late Neoproterozoic granitic gneisses of Golpayegan metamorphic complex: a new respect for Cadomian crust in the Sanandaj-Sirjan zone, Iran Reviewed International coauthorship International journal

    Moradi, A., Shabanian, N., Davoudian, A.R., Azizi, H., Santos, J.F, Asahara, Y.

    International Geology Review     page: in press   2021.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Taylor & Francis  

    DOI: 10.1080/00206814.2020.1821251

  2. Zircon U-Pb ages and petrogenesis of late Miocene adakitic rocks from the Sari Gunay gold deposit, NW Iran Reviewed International coauthorship International journal

    Shahbazi, H., Maghami, Y.T., Azizi, H., Asahara, Y. Siebel, W., Maanijou, M., and Rezai, A.

    Geological Magazine     page: in press   2021.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Cambridge University Press  

    DOI: 10.1017/S0016756821000297

  3. Tectonic significance of the late Eocene (Bartonian) calc-alkaline granitoid body in the Marivan area, Zagros suture zone, northwest Iran Reviewed International coauthorship International journal

    Rezaei, F., Azizi, H., Asahara, Y.

    International Geology Review     page: in press   2021.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Taylor & Francis  

    DOI: 10.1080/00206814.2021.1907624

  4. Coexistence of two types of Late Paleocene adakitic granitoid, Soursat complex, NW Iran Reviewed International coauthorship International journal

    Nouri, F., Azizi, H., Asahara, Y., Whattam, S.A., Tsuboi, M., Mohammad, Y.O., Minami, M., Anma, R.

    Lithos   Vol. 404-405   page: 106438   2021.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier B.V.  

    DOI: 10.1016/j.lithos.2021.106438

    Web of Science

  5. Early Cambrian highly fractionated granite, Central Iran: evidence for drifting of Northern Gondwana and the evolution of the Proto-Tethys Ocean Reviewed International coauthorship International journal

    Nouri, F., Davoudian, A.R., Allen, M., Azizi, H., Asahara, Y., Anma, R., Shabanian, N., Tsuboi, M., Khodami, M.

    Precambrian Research   Vol. 362   page: 106291   2021.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier B.V.  

    DOI: 10.1016/j.precamres.2021.106291

  6. Geochemistry and genesis of beryl crystals in the LCT pegmatite type, Ebrahim-Attar Montain, western Iran Reviewed International coauthorship International journal

    Daneshvar, N., Azizi, H., Asahara, Y., Tsuboi, M., Minami, M., Mohammad, Y.O.

    Minerals   Vol. 11 ( 7 ) page: 717   2021.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:MDPI  

    DOI: 10.3390/min11070717

    Web of Science

  7. Early Miocene post-collision andesite in the Takab area, northwest Iran Reviewed International coauthorship International journal

    Azizi, H., Daneshvar, N., Mohammadi, A., Asahara, Y., Wattam, S.A., Tsuboi, M., Minami, M.

    Journal of Petrology   Vol. 62 ( 7 ) page: egab022   2021.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Oxford University Press  

    DOI: 10.1093/petrology/egab022

  8. Zircon U-Pb ages, geochemistry and Sr-Nd isotopes of the Golshekanan granitoid, Urumieh-Dokhtar magmatic arc, Iran: evidence for partial melting of juvenile crust Reviewed International coauthorship International journal

    Sarjoughian, F., Zahedi, B., Azizi, H., Ling, W., Lentz, D. and Asahara, Y.

    Geological Magazine   Vol. 158   page: 1289 - 1304   2021.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Cambridge University Press  

    DOI: 10.1017/S0016756820001338

  9. A-type granite in the Boein-Miandasht Complex: evidence for a Late Jurassic extensional regime in the Sanandaj-Sirjan Zone, western Iran Reviewed International coauthorship International journal

    Tavakoli, N., Shabanian, N., Davoudian, A.R., Hossein Azizi, H., Franz Neubauer, F., Asahara, Y., Bernroider, M., Lee, J.K.W.

    Journal of Asian Earth Sciences   Vol. 213   page: 104771   2021.6

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier B.V.  

    DOI: 10.1016/j.jseaes.2021.104771

    Web of Science

  10. Characteristics in trace elements compositions of tephras (B-Tm and To-a) for identification tools Reviewed International journal

    Nara, F.W., Yokoyama, T., Yamazaki, S., Minami, M., Asahara, Y., Watanabe, T., Yamada, K., Tsuchiya, N., Yasuda, Y.

    Geochemical Journal   Vol. 55 ( 3 ) page: 117 - 133   2021.5

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Geochemical Society of Japan  

    DOI: 10.2343/geochemj.2.0619

    Web of Science

  11. Multi-approach characterization of shallow-water carbonates off Minamitorishima and their depositional settings/history Reviewed International coauthorship International journal

    Aftabuzzaman, Md., Yomogida, K., Suzuki, S., Takayanagi, H., Ishigaki, A., Machida, S., Asahara, Y., Yamamoto, K., Hirano, N., Sano, S., Chiyonobu, S., Bassi, D., Iryu, Y.

    Island Arc   Vol. 30 ( 1 ) page: e12400   2021.4

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:John Wiley & Sons Australia, Ltd.  

    DOI: 10.1111/iar.12400

  12. Zircon U-Pb ages, geochemistry, and Sr-Nd isotope ratios for early cretaceous magmatic rocks, southern Saqqez, northern Iran Reviewed International coauthorship International journal

    Gholipour, S., Azizi, H., Masoudi, F., Asahara, Y., Tsuboi, M.

    Chemie der Erde   Vol. 81   page: 125687   2021.4

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.chemer.2020.125687

  13. A new perspective on Cenozoic calc-alkaline and shoshonitic volcanic rocks, eastern Saveh (central Iran) Reviewed International coauthorship International journal

    Nouri, F., Azizi, H., Asahara, Y., Stern, R.J.

    International Geology Review   Vol. 63 ( 4 ) page: 476 - 503   2021.3

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Taylar & Francis  

    DOI: 10.1080/00206814.2020.1718005

  14. Petrogenesis of the Carboniferous Ghaleh-Dezh metagranite, Sanandaj-Sirjan zone, Iran: constraints from new zircon U-Pb and 40Ar/39Ar ages and Sr-Nd isotopes Reviewed International coauthorship International journal

    Shabanian, N., Davoudian, A.R., Azizi, H., Asahara, Y., Neubauer, F., Genser, J., Dong, Y., Lee, J.K.W.

    Geological Magazine   Vol. 157 ( 11 ) page: 1823 - 1852   2020.11

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Cambridge University Press  

    DOI: 10.1017/S0016756820000096

  15. Long-lived, Eocene-Miocene stationary magmatism in NW Iran along a transform plate boundary Reviewed International coauthorship International journal

    Ahmad, R., Rossetti, F., Asahara, Y., Azizi, H., Lucci, F., Lustrino, M., Nozaem, R.

    Gondwana Research   Vol. 85   page: 237 - 262   2020.9

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier  

    DOI: 10.1016/j.gr.2020.03.014

  16. New evidence for Jurassic continental rifting in the northern Sanandaj Sirjan Zone, western Iran: the Ghalaylan seamount, southwest Ghorveh Reviewed International coauthorship International journal

    Azizi, H., Nouri, F., Stern, R.J., Azizi, M., Lucci, F., Asahara, Y., Zarinkoub, M.H., Chung, S.L.

    International Geology Review   Vol. 62 ( 13-14 ) page: 1635 - 1657   2020.9

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Taylor & Francis  

    DOI: 10.1080/00206814.2018.1535913

  17. Zircon U-Pb dating, mineralogy and geochemical characteristics of the gabbro and gabbro-diorite bodies, Boein-Miandasht, western Iran Reviewed International coauthorship International journal

    Tavakoli, N., Davoudian, A.R., Shabanian, N., Azizi, H., Neubauer, F., Asahara, Y., Bernroider, M.

    International Geology Review   Vol. 62   page: 1658 - 1676   2020.9

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Taylar & Francis  

    DOI: 10.1080/00206814.2019.1583139

  18. Geochemical and Sr-Nd isotopic constraints on the genesis of the Soheyle-PaKuh granitoid rocks (central Urumieh-Dokhtar magmatic belt, Iran) Reviewed International coauthorship International journal

    Sarjoughian, F., Javadi, S., Azizi, H., Ling, W., Asahara, Y. and Lentz, D.

    International Geology Review   Vol. 62   page: 1769 - 1795   2020.9

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Taylar & Francis  

    DOI: 10.1080/00206814.2019.1579676

  19. Sequential magma injection with a wide range of mixing and mingling in Late Jurassic plutons, southern Ghorveh, western Iran Reviewed International coauthorship International journal

    Azizi, H., Asahara, Y., Minami, M., Anma, R.

    Journal of Asian Earth Sciences   Vol. 200   page: 104469   2020.9

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier  

    DOI: 10.1016/j.jseaes.2020.104469

  20. Rare earth elements and Sr isotope ratios of large apatite crystals in Ghareh Bagh mica mine, NW Iran: Tracing for Petrogenesis and Mineralization Reviewed International coauthorship International journal

    Daneshvar, N., Azizi, H., Asahara, Y., Tsuboi, M., Hosseini, M.

    Minerals   Vol. 10 ( 9 ) page: 833   2020.9

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:MDPI  

    DOI: 10.3390/min10090833

    Web of Science

  21. Petrology and geochemistry of the Lattan Mountain magmatic rocks in the Sanandaj-Sirjan Zone, west of Iran Reviewed International coauthorship International journal

    Ahankoub, M., Asahara, Y., Tsuboi, M.

    Arabian Journal of Geosciences   Vol. 13 ( 16 ) page: 809   2020.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Springer  

    DOI: 10.1007/s12517-020-05820-x

    Web of Science

  22. Variability of protoliths and pressure-temperature conditions of amphibolites from the Ohmachi Seamount (Izu-Bonin-Mariana arc): evidence of a fossil subduction channel in a modern intra-oceanic arc Reviewed International journal

    Imayama, T., Ueda, H., Usuki, T, Minami, M., Asahara, Y., Nagahashi, T.

    Mineralogy and Petrology   Vol. 114   page: 305 - 318   2020.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Springer  

    DOI: 10.1007/s00710-020-00705-z

  23. A chronological and geochemical study of the Tadamigawa older-stage granites: igneous activity in the west of the Tanakura Tectonic Line (TTL) of northeastern Japan Reviewed International journal

    Wakasugi, Y., Wakaki, S., Tanioka, Y., Ichino, K., Tsuboi, M., Asahara, Y., Noda, A.

    Geochemical Journal   Vol. 54 ( 4 ) page: 203 - 220   2020.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:The Geochemical Society of Japan  

    DOI: 10.2343/geochemj.2.0603

  24. Systematic variation in rare earth element patterns from a felsic granulite of the Jirisan complex, Yeongnam Massif, Korea Reviewed International coauthorship International journal

    Lee, S.G., Song, Y.S., Asahara, Y., Tanaka, T., Park, K.H.

    Geochemical Journal   Vol. 54 ( 4 ) page: 183 - 194   2020.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:The Geochemical Society of Japan  

    DOI: 10.2343/geochemj.2.0590

  25. Investigation of rare earth elements (REEs) as exploration potential in intrusive bodies in the northern Sanandaj-Sirjan zone (Kurdistan area), western Iran Reviewed International coauthorship International journal

    Azizi, H., Maghsoudloo, A., Nouri, F., Asahara, Y., Yamamoto, K., Minami, M., Tsuboi, M.

    Geochemical Journal   Vol. 54 ( 4 ) page: 221 - 232   2020.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:The Geochemical Society of Japan  

    DOI: 10.2343/geochemj.2.0584

  26. Integrated Neogene biochemostratigraphy at DSDP Site 296 on the Kyushu-Palau Ridge in the western North Pacific Reviewed International journal

    Matsui, H., Horikawa, K., Chiyonobu, S., Itaki, T., Ikehara, M., Kawagata, S., Wakaki-Uchimura, H., Asahara, Y., Seki, O., Okazaki, Y.

    Newsletters on Stratigraphy   Vol. 53   page: 313 - 331   2020.6

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Schweizerbart Science Publishers  

    DOI: 10.1127/nos/2019/0549

  27. Detrital Sr-Nd isotopes, sediment provenances and depositional processes in the Laxmi Basin of the Arabian Sea during the last 800 ka Reviewed International coauthorship International journal

    Khim, B.K., Horikawa, K., Asahara, Y., Kim, J.E, Ikehara, M.

    Geological Magazine   Vol. 157   page: 895 - 907   2020.6

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Cambridge University Press  

    DOI: 10.1017/S0016756818000596

  28. Anatomy of the magmatic plumbing system of Los Humeros Caldera (Mexico): implications for geothermal systems Reviewed International coauthorship International journal

    Lucci, F., Carrasco-Núñez, G., Rossetti, F., Theye, T., White, J.C., Urbani, S., Azizi, H., Asahara, Y., Giordano, G.

    Solid Earth   Vol. 11   page: 125 - 159   2020.1

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Copernicus Publications  

    DOI: 10.5194/se-11-125-2020

  29. Petrogenesis and geodynamic implications of an Ediacaran (550Ma) granite complex (metagranites), southwestern Saqqez, northwest Iran Reviewed International coauthorship International journal

    Daveshvar, N., Maanijou, M, Azizi, H., Asahara, Y.

    Journal of Geodynamics   Vol. 132   page: 101669   2019.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier  

    DOI: 10.1016/j.jog.2019.101669

  30. Late Paleocene adakitic granitoid from NW Iran and comparison with adakites in the NE Turkey: Adakitic melt generation in normal continental crust Reviewed International coauthorship International journal

    Azizi, H, Stem, R.J, Topuz, G, Asahara, Y, Moghadam, H.S.

    Lithos   Vol. 346   page: 105151   2019.11

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier  

    DOI: 10.1016/j.lithos.2019.105151

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  31. Common occurrence of calcic plagioclase in granitoids from Mt. Kaizuki area, central Japan Reviewed International coauthorship International journal

    Hong Mei, Enami, M, Tsuboi, M, Asahara, Y

    Journal of Mineralogical and Petrological Sciences   Vol. 114 ( 4 ) page: 201 - 213   2019.9

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Japan Association of Mineralogical Sciences  

    <p>Calcic plagioclase with anorthite (An) content of up to 91% commonly occurs in coexistence with the sodic phase (An<sub><40–50</sub>) in the Cretaceous Kaizuki–yama (Mt. Kaizuki) granitoid body that intrudes into the Mino belt of the Jurassic accretionary sediment complex in central Japan. The Kaizuki–yama granitoids are mainly composed of plagioclase, K–feldspar, quartz, and biotite with subordinate amounts of amphibole, ilmenite, and apatite. The sodic plagioclase grains show common igneous–type normal zoning with decreasing anorthite content toward the rim. In most cases, the calcic plagioclase occurs as a crystal core, which is discontinuously surrounded by a sodic mantle. The calcic parts rarely show fine and nebular texture with sodic domains; however, a thin calcic zone (100–150 µm in width) develops along the boundary between the nebular core and the sodic mantle. In the nebular core, calcic plagioclase sometimes rims the fine–grained calcite, prehnite, and zoisite/epidote (less than 10–20 µm in size). Most amphibole grains have ferropargasite/ferrohornblende compositions and are usually rimmed by secondary ferro–actinolite. Although the pressure/temperature conditions estimated based on amphibole–plagioclase equilibria vary widely between samples, they show systematic decreases in pressure with decreasing temperature from 0.5 GPa/800 °C to approximately 0.2 GPa/700 °C. Some anorthite–rich plagioclase grains may have been xenocrystic and/or antecrystic in origins, and others were crystallized from calcic part of locally heterogeneous magma. The incorporation of calcic plagioclase into the felsic magma and the locally calcic environment probably resulted from the assimilation of skarn and related calcareous rocks consisting of the wall rocks of the Kaizuki–yama body during magmatic intrusion and solidification.</p>

    DOI: 10.2465/jmps.190118

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    CiNii Article

  32. Litho-, bio-, and chemostratigraphy of the Middle Triassic carbonate succession in the North-Central Coast Region of Vietnam Reviewed International coauthorship International journal

    Thuy Thi Nhu Ha, Takayanagi, H., Ueno, K., Asahara, Y., Yamamoto, K., Iryu, Y.

    Progress in Earth and Planetary Science   Vol. 6   page: 47   2019.7

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    Middle Triassic carbonates extend from the North-Central Coast region of Vietnam to northern Laos. We conducted sedimentological, paleontological, and geochemical analyses on the carbonates of the Hoang Mai Formation in Nghe An province, Vietnam. The carbonates consist of the following six lithostratigraphic units (from bottom to top): sandy limestone (unit 1), peloidal packstone with a microbialite interlayer (unit 2), peloidal packstone and oncoidal floatstone (unit 3), peloidal–bioclastic packstone (unit 4), peloidal packstone with variable quantities of bioclasts and microbialite (unit 5), and peloidal packstone with variable quantities of bioclasts (unit 6). The sandy nature of unit 1 and of three of the interlayers in unit 2 indicates a supply of terrigenous material during the early stages of formation of the Hoang Mai carbonate platform. The dominance of carbonates with a fine-grained matrix throughout the overlying succession implies a low-energy depositional environment. Common occurrences of dasycladalean algae in units 4–6 indicate a back-reef lagoon environment. A total of 24 foraminiferal taxa, including Citaella dinarica and C. deformata, were identified. These two age-diagnostic species occur in units 3–6, suggesting that this interval is correlated with the Pelsonian and that the lower units (units 1–2) are potentially correlated with the Bithynian. Thus, the entire core section can be assigned to the middle Anisian (lower Middle Triassic). An assessment of the diagenetic alteration using geochemical parameters indicates that the carbonates of the studied succession have not retained their initial strontium (87Sr/86Sr) and oxygen (δ18O) isotope compositions. In contrast, the carbonates in the lower (units 1–2) and middle (units 2–5) intervals have retained their initial carbon isotope compositions (δ13C), making them suitable for C isotopic analyses. In the lower interval, we observe a slight δ13C-enrichment, followed by a gradual δ13C-depletion upwards into the middle interval. The observed trend in δ13C values from the Hoang Mai Formation can be correlated with similar trends reported from South China and Romania. Samples within the upper interval (units 5–6) of the Vietnamese δ13C profile are relatively δ13C-depleted, which is likely the result of diagenetic overprinting.

    DOI: 10.1186/s40645-019-0293-y

    Web of Science

  33. Multiphase magma intrusion, ore-enhancement and hydrothermal carbonatisation in the Siah-Kamar porphyry Mo deposit, Urumieh-Dokhtar magmatic zone, NW Iran Reviewed International coauthorship International journal

    Ahmad, R., Rossetti, F., Tech, F., Asahara, Y., Azizi, H., Glondny, J., Lucci, F., Nozaem, R., Opitz, J., Selby, D.

    Ore Geology Reviews   Vol. 110   page: 102930   2019.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier  

    DOI: 10.1016/j.oregeorev.2019.05.016

  34. Petrogenesis of the Harisn-Sahneh serpentinized peridotite along the Zagros suture zone, western Iran: New evidence for mantle metasomatism Reviewed International coauthorship International journal

    Nouri, F., Asahara, Y., Azizi, H., Tsuboi, M.

    Geological Magazine   Vol. 156 ( 5 ) page: 772 - 800   2019.5

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Cambridge University Press  

    DOI: 10.1017/S0016756818000201

  35. Sr-87/Sr-86 age determination by rapidly formed spherical carbonate concretions Reviewed International coauthorship International journal

    Yoshida, H., Asahara, Y., Yamamoto, K., Katsuta, N., Minami, M., Metcalfe, R.

    Scientific Reports   Vol. 9   page: 1003   2019.1

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Nature Publishing Group  

    Isolated spherical carbonate concretions are frequently observed in finer grained marine sediments of widely varying geological age. Recent studies on various kinds of spherical carbonate (CaCO3) concretions revealed that they formed very rapidly under tightly constrained conditions. However, the formation ages of the isolated spherical carbonate concretions have never been determined. Here we use Sr-87/Sr-86 ratios to determine the ages of these spherical concretions. The studied concretions formed in the Yatsuo Group of Miocene age in central Japan. Some formed post- mortem around tuskshells (Fissidentalium spp.), while other concretions have no shell fossils inside. The deformation of sedimentary layers around the concretions, combined with geochemical analyses, reveal that Sr was incorporated into the CaCO3 concretions during their rapid formation. Strontium isotopic stratigraphy using Sr-87/Sr-86 ratios of all concretions indicates an age of 17.02 +/- 0.27 Ma, with higher accuracy than the ages estimated using micro- fossils from the Yatsuo Group. The results imply that the Sr-87/Sr-86 ratio of isolated spherical carbonate concretions can be applied generally to determine the numerical ages of marine sediments, when concretions formed soon after sedimentation. The Sr-87/Sr-86 age determinations have high accuracy, even in cases without any fossils evidence.

    DOI: 10.1038/s41598-019-38593-9

    Web of Science

  36. Age, geochemistry and emplacement of the ~40-Ma Baneh granite-appinite complex in a transpressional tectonic regime, Zagros suture zone, northwest Iran Reviewed International coauthorship International journal

    Azizi, H., Haddad, S., Stern, R.J., Asahara, Y.

    International Geology Review   Vol. 61 ( 2 ) page: 195 - 223   2019.1

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Taylor & Francis  

    DOI: 10.1080/00206814.2017.1422394

  37. Fe-oxide concretions formed by interacting carbonate and acidic waters on Earth and Mars Reviewed International coauthorship International journal

    Yoshida, H., Hasegawa, H., Katsuta, N., Maruyama, I., Sirono, S., Minami, M., Asahara, Y., Nishimoto, S., Yamaguchi, Y., Ichinnorov, N., Metcalfe, R.

    Science Advances   Vol. 4   page: eaau0872   2018.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:AAAS, American Association for the Advancement of Science  

    DOI: 10.1126/sciadv.aau0872

  38. Geochemical interpretation of magnesium and oxygen isotope systematics in granites with the REE tetrad effect Reviewed International coauthorship International journal

    Lee, S.G., Ahn, I., Asahara, Y., Tanaka, T., Lee, S.R.

    Geosciences Journal   Vol. 22 ( 5 ) page: 697 - 710   2018.10

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Springer  

    DOI: 10.1007/s12303-018-0024-1

  39. Late Miocene-mid-Pliocene tectonically induced formation of the semi-closed Japan Sea, inferred from seawater Nd isotopes Reviewed International journal

    Yukiko Kozaka, Keiji Horikawa, Yoshihiro Asahara, Hiroshi Amakawa, Yusuke Okazaki

    Geology   Vol. 46 ( 10 ) page: 903 - 906   2018.9

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:The Geological Society of America  

    DOI: 10.1130/G45033.1

  40. Zircon U-Pb dating, geochemistry and evolution of the Late Eocene Saveh magmatic complex, central Iran: Partial melts of sub-continental lithospheric mantle and magmatic differentiation Reviewed International coauthorship International journal

    Nouri, F., Azizi, H., Stern, R.J., Asahara, Y., Khodaparast, S., Madanipour, S., Yamamoto, K.

    Lithos   Vol. 314-315   page: 274 - 292   2018.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier  

    DOI: 10.1016/j.lithos.2018.06.013

  41. Petrogenesis and geochronology of Mishao peraluminous I-type granites, Shalair valley area, NE Iraq Reviewed International coauthorship International journal

    Abdulzahra, I.K., Hadi, A., Asahara, Y., Azizi, H., Yamamoto, K.

    Chemie der Erde   Vol. 78   page: 215 - 227   2018.5

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier  

    DOI: 10.1016/j.chemer.2018.01.003

  42. The Late Jurassic Panjeh submarine volcano in the northern Sanandaj-Sirjan Zone, northwest Iran: Mantle plume or active margin? Reviewed International coauthorship International journal

    Azizi, H., Lucci, F., Stern, R.J., Hasannejad, S., Asahara, Y.

    Lithos   Vol. 308-309   page: 364 - 380   2018.5

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier  

    DOI: 10.1016/j.lithos.2018.03.019

  43. A- and I-type metagranites from the North Shahrekord Metamorphic Complex, Iran: Evidence for Early Paleozoic post-collisional magmatism Reviewed International coauthorship International journal

    Badr, A., Davoudian, A.R., Shabanian, N., Azizi, H., Asahara, Y., Neubauer, F., Dong, Y., Yamamoto, K.

    Lithos   Vol. 300   page: 86 - 104   2018.2

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    The North Shahrekord Metamorphic Complex (NSMC) of the central Sanandaj-Sirjan Zone (SaSZ) consists of metagranitoid bodies, which were metamorphosed within high pressure-low temperature conditions. Whole rock chemistry shows relatively high amounts of SiO2 (65–77 wt%) and Al2O3 (12–15 wt%), low amounts of Nb, P, Sr, Ti, a high ratio of Ga/Al (4–9) and a negative Eu anomaly. The chemical compositions of metagranites are reasonably similar to A- and I-type granites. U–Pb zircon ages of three samples of metagranites indicate that crystallization of the granites occurred at 521.6 ± 9.1 to 513.5 ± 8.5 Ma, Middle Cambrian. The initial 87Sr/86Sr and 143Nd/144Nd ratios of samples vary from 0.7057–0.7239 and 0.511801–0.511890, respectively. High initial 87Sr/86Sr ratios and low εNd(t) values (− 3.39 to − 1.07) associated with high ratios of 206Pb/204Pb(t) = 17.8557–18.8045, 207Pb/204Pb(t) = 15.6721–15.7220, and 208Pb/204Pb(t) = 37.7490–38.4468 infer a significant contribution of continental crust in generating the source magma of the metagranite bodies. The results reveal that the metagranites were mainly produced through mixing of basaltic melts with components similar to metasedimentary sources. The new results show that crystallization of the metagranites occurred in Early Paleozoic times and much earlier than break-up and drifting of the SaSZ from the Arabian plate, suggesting that the metagranites were mainly produced in the western Iran after the closure of the Proto-Tethys Ocean. This model is consistent with the previously suggested models for formation of an Early Paleozoic granitoid belt along the northern rim of Gondwana.

    DOI: 10.1016/j.lithos.2017.12.008

    Web of Science

    Scopus

  44. Study of the zircon morphology and internal structures as a tool for constraining magma source: example from granitoid bodies in the northern Sanandaj Sirjan zone (SW Saqqez) Reviewed International coauthorship International journal

    Daveshvar, N, Maanijou, M, Azizi, H, Asahara, Y

    Geopersia   Vol. 8 ( 2 ) page: 245 - 259   2018

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:University of Tehran  

    DOI: 10.22059/GEOPE.2018.239656.648342

    Web of Science

  45. Geochemistry and petrogensis of the Eocene back arc mafic rocks in the Zagros suture zone, northern Noorabad, western Iran Reviewed International coauthorship International journal

    Nouri, F., Asahara, Y., Azizi, H., Yamamoto, K., Tsuboi, M.

    Chemie der Erde   Vol. 77   page: 517 - 533   2017.9

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier B.V.  

    DOI: 10.1016/j.chemer.2017.06.002

  46. A distinctive chemical composition of the tektites from Thailand and Vietnam, and its geochemical significance Reviewed International coauthorship

    Lee, S.G., Tanaka, T., Asahara, Y., Minami, M.

    The Journal of the Petrological Society of Korea   Vol. 26 ( 3 ) page: 281 - 295   2017.9

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    Language:Korean   Publishing type:Research paper (scientific journal)   Publisher:The Petrological Society of Korea  

    DOI: 10.7854/JPSK.2017.26.3.281

  47. A-type granitoid in Hasansalaran complex, northwestern Iran: Evidence for extensional tectonic regime in northern Gondwana in the Late Paleozoic Reviewed International coauthorship International journal

    Azizi, H, Kazemi, T, Asahara, Y

    Journal of Geodynamics   Vol. 108   page: 56 - 72   2017.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier B.V.  

    DOI: 10.1016/j.jog.2017.05.003

    Web of Science

  48. Zircon U-Pb ages and Sr-Nd isotope ratios for the Sirstan granitoid body, NE Iraq: Evidence of magmatic activity in the Middle Cretaceous Period Reviewed International coauthorship International journal

    Abdulzahra, I.K., Hadi, A., Azizi, H., Asahara, Y., Yamamoto, K.

    Comptes Rendus Geoscience   Vol. 349   page: 53 - 62   2017.4

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    DOI: 10.1016/j.crte.2017.02.004

  49. Geochemistry of metabasites from the North Shahrekord metamorphic complex, Sanandaj-Sirjan Zone: Geodynamic implications for the Pan-African basement in Iran Reviewed International coauthorship International journal

    Malek-Mahmoudi, F., Ali Reza Davoudian, A.R., Shabanian, N., Azizi, H., Asahara, Y., Neubauer, F., Dong, Y.

    Precambrian Research   Vol. 293   page: 56 - 72   2017.3

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    DOI: 10.1016/j.precamres.2017.03.003

  50. Rb-Sr and Sm-Nd isotope geochemistry and petrogenesis of the Misho Mountains mafic dikes (NW Iran) Reviewed International coauthorship International journal

    Ahankoub, M, Asahara, Y

    Journal of Economic Geology   Vol. 8 ( 2 ) page: 399 - 413   2017.1

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    Language:Persian   Publishing type:Research paper (scientific journal)   Publisher:Ferdowsi University of Mashhad, Iran  

    DOI: 10.22067/econg.v8i2.32585

  51. Strongly peraluminous leucogranite (Ebrahim-Attar granite) as evidence for extensional tectonic regime in the Cretaceous, Sanandaj Sirjan zone, northwest Iran Reviewed International coauthorship International journal

    Azizi, H., Mohammadi, K., Asahara, Y., Tsuboi, M., Daneshvar, N., Mehrabi, B.

    Chemie der Erde   Vol. 76   page: 529 - 541   2016.12

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    DOI: 10.1016/j.chemer.2016.08.006

  52. Petrogenesis and geodynamic evolution of the Kajan Neogene subvolcanic rocks, Nain, Central Iran Reviewed International coauthorship International journal

    Golkaram, S., Rashidnejad-Omran, N., Azizi, H., Asahara, Y., Buchs, D.M., McDonald, I., Santos, J.F.

    Chemie der Erde   Vol. 76   page: 567 - 578   2016.12

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    DOI: 10.1016/j.chemer.2016.08.007

  53. Zircon U-Pb ages and geochemistry of Devonian A-type granites in the Iraqi Zagros suture zone (Damamna area): New evidence for magmatic activity related to the Hercynian orogeny Reviewed International coauthorship International journal

    Abdulzahra, I.K., Hadi, A., Asahara, Y., Azizi, H., Yamamoto, K.

    Lithos   Vol. 264   page: 360 - 374   2016.11

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    DOI: 10.1016/j.lithos.2016.09.006

  54. Brucite as an important phase of the shallow mantle wedge: Evidence from the Shiraga unit of the Sanbagawa subduction zone, SW Japan Reviewed International journal

    Kawahara, H., Endo, S., Wallis, S.R., Nagaya, T., Mori, H., Asahara, Y.

    Lithos   Vol. 254-255   page: 53 - 66   2016.6

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    DOI: 10.1016/j.lithos.2016.02.022

  55. Age and petrogenesis of Na-rich felsic rocks in western Iran: evidence for closure of the southern branch of the Neo-Tethys in the Late Cretaceous Reviewed International coauthorship International journal

    Nouri, F., Azizi, H., Golonka, J., Asahara, Y., Orihashi, Y., Yamamoto, K., Tsuboi, M., Anma, R.

    Tectonophysics   Vol. 671   page: 151 - 172   2016.3

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    DOI: 10.1016/j.tecto.2015.12.014

  56. U-Pb zircon ages and geochemistry of Kangareh and Taghiabad mafic bodies in northern Sanandaj-Sirjan Zone, Iran: Evidence for intra-oceanic arc and back-arc tectonic regime in Late Jurassic Reviewed International coauthorship

    Azizi, H., Najari, M., Asahara, Y., Catlos, E.J., Shimizu, M., Yamamoto, K.

    Tectonophysics   Vol. 660   page: 47 - 64   2015.10

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    DOI: 10.1016/j.tecto.2015.08.008

  57. Early post-mortem formation of carbonate concretions around tusk-shells over week-month timescales Reviewed International coauthorship International journal

    Yoshida, H., Ujihara, A., Minami, M., Asahara, Y., Katsuta, N., Yamamoto, K., Sirono, S., Maruyama, I., Nishimoto, S. and Metcalfe, R.

    Scientific Reports   Vol. 5   page: 14123   2015.9

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Nature Publishing Group  

    DOI: 10.1038/srep14123

  58. Integrated isotopic ages and correlation of the basement plutonic rocks of the borehole (Kukizaki core) at southern Tsukuba City, Japan Reviewed

    Takagi, H., Takahashi, M., Hayashi, H., Kasahara, K., Horie, K., Asahara, Y., Iwano, H., Yamamoto, S. and Sekiguchi, S.

    The Journal of the Geological Society of Japan   Vol. 121 ( 9 ) page: 325 - 337   2015.9

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    DOI: 10.5575/geosoc.2015.0021

  59. A Paleoarchean coastal hydrothermal field inhabited by diverse microbial communities: the Strelley Pool Formation, Pilbara Craton, Western Australia Reviewed International coauthorship International journal

    Sugitani, K., Mimura, K., Takeuchi, M., Yamaguchi, T., Suzuki, K., Senda, R., Asahara, Y. and Van Kranendonk, M.J.

    Geobiology   Vol. 13 ( 6 ) page: 522 - 545   2015.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:John Wiley & Sons Ltd  

    DOI: 10.1111/gbi.12150

  60. Evolution processes of Ordovician-Devonian arc system in the South-Kitakami massif and its relevance to the Ordovician ophiolite pulse Reviewed International journal

    Ozawa, K., Maekawa, H., Shibata, K., Asahara, Y., Yoshikawa, M.

    Island Arc   Vol. 24 ( 2 ) page: 73 - 118   2015.7

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:John Wiley & Sons Australia, Ltd.  

    DOI: 10.1111/iar.12100

  61. Zircon U-Pb ages and petrogenesis of a tonalite-trondhjemite-granodiorite (TTG) complex in the northern Sanandaj-Sirjan Zone, northwest Iran: Evidence for Late Jurassic arc-continent collision Reviewed International coauthorship International journal

    Azizi, H., Zanjefili-Beiranvand, M., Asahara, Y.

    Lithos   Vol. 216-217   page: 178 - 195   2015.2

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier B.V.  

    DOI: 10.1016/j.lithos.2014.11.012

  62. Distribution and transport processes of lithogenic material from the Amur River revealed by the Sr and Nd isotope ratios of sediments from the Sea of Okhotsk Reviewed International journal

    Yasuda, T., Asahara, Y., Ichikawa, R., Nakatsuka, M., Minami, H., Nagao, S.

    Progress in Oceanography   Vol. 126   page: 155 - 167   2014.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier B.V.  

    DOI: 10.1016/j.pocean.2014.04.015

  63. Reply to the comment by Granier on "Early Aptian paleoenvironmental evolution of the Bab Basin at the southern Neo-Tethys margin: Response to global carbon-cycle perturbations across Ocean Anoxic Event 1a" Reviewed International journal

    Kazuyuki Yamamoto, Masatoshi Ishibashi, Hideko Takayanagi, Yoshihiro Asahara, Tokiyuki Sato, Hiroshi Nishi, Yasufumi Iryu

    Geochemistry, Geophysics, Geosystems   Vol. 15 ( 5 ) page: 2901 - 2904   2014.5

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Geophysical Union  

    DOI: 10.1002/2014GC005390

  64. Diatoms spread a high eNd-signature in the North Pacific Ocean Reviewed International journal

    Tasuku Akagi, Saki Yasuda, Yoshihiro Asahara, Mariko Emoto, Kozo Takahashi

    Geochemical Journal   Vol. 48 ( 2 ) page: 121 - 131   2014.4

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:The Geochemical Society of Japan  

    DOI: 10.2343/geochemj.2.0292

  65. The role of heterogenetic mantle in the genesis of adakites in the northeast of Sanandaj, northwestern Iran Reviewed International coauthorship International journal

    Hossein Azizi, Yoshihiro Asahara, Motohiro Tsuboi, Kento Takemura, Saman Razyani

    Chemie der Erde - Geochemistry   Vol. 74 ( 1 ) page: 87 - 97   2014.3

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier B.V.  

    DOI: 10.1016/j.chemer.2013.09.008

  66. Quaternary high-Nb basalts: existence of young oceanic crust under the Sanandaj-Sirjan Zone, NW Iran Reviewed International coauthorship International journal

    Hossein Azizi, Yoshihiro Asahara, Motohiro Tsuboi

    International Geology Review   Vol. 56 ( 2 ) page: 167 - 186   2014.1

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Taylor & Francis  

    DOI: 10.1080/00206814.2013.821268

  67. Episyenite formation in the Toki granite Reviewed International journal

    Nishimoto, S., Yoshida, H., Asahara, Y., Tsuruta, T., Ishibashi, M., Katsuta, N.

    Contributions to Mineralogy and Petrology   Vol. 167   page: 960   2014.1

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Springer Nature  

    DOI: 10.1007/s00410-013-0960-8

  68. Geochemistry and geodynamics for the Mawat mafic complex in the Zagros Suture zone, northeast Iraq Reviewed International coauthorship International journal

    Azizi, H., Hadi, A., Asahara, Y., Mohammad, Y.O.

    Central European Journal of Geosciences   Vol. 5 ( 4 ) page: 523 - 537   2013.12

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Springer Nature  

    DOI: 10.2478/s13533-012-0151-6

  69. Early Aptian paleoenvironmental evolution of the Bab Basin at the southern Neo-Tethys margin: Response to global carbon-cycle perturbations across Ocean Anoxic Event 1a Reviewed International journal

    Kazuyuki Yamamoto, Masatoshi Ishibashi, Hideko Takayanagi, Yoshihiro Asahara, Tokiyuki Sato, Hiroshi Nishi, Yasufumi Iryu

    Geochemistry, Geophysics, Geosystems   Vol. 14 ( 4 ) page: 1104 - 1130   2013.4

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Geophysical Union  

    DOI: 10.1002/ggge.20083

  70. Juvenile granite in the Sanandaj-Sirjan Zone, NW Iran: Late Jurassic-Early Cretaceous arc-continent collision Reviewed International coauthorship International journal

    Hossein Azizi, Yoshihiro Asahara

    International Geology Review   Vol. 55 ( 12 ) page: 1523 - 1540   2013.4

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Taylor & Francis  

    DOI: 10.1080/00206814.2013.782959

  71. Geochemical significance of the Rb-Sr, La-Ce and Sm-Nd isotope systems in A-type rocks with REE tetrad patterns and negative Eu and Ce anomalies: The Cretaceous Muamsa and Weolaksan granites, South Korea Reviewed International coauthorship International journal

    Seung-Gu Lee, Yoshihiro Asahara, Tsuyoshi Tanaka, Seung-Ryeol Lee, Taejong Lee

    Chemie der Erde   Vol. 73 ( 1 ) page: 75 - 88   2013.3

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    DOI: 10.1016/j.chemer.2012.11.008

  72. Ln-resin and HIBA method for La-Ce and Sm-Nd isotope measurement Reviewed International coauthorship

    Seung-Gu Lee, Hyomin Lee, Yoshihiro Asahara, Mi-Jeong Lee, MiKyeong Choo, Seung-Ryeol Lee

    Journal of the Geological Society of Korea   Vol. 21 ( 4 ) page: 431 - 439   2012.12

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    Language:Korean   Publishing type:Research paper (scientific journal)   Publisher:The Petrological Society of Korea  

    DOI: 10.7854/JPSK.2012.21.4.431

  73. Petrochemical and Sr-Nd isotope investigations of A-type granites in the east of Misho, NW Iran Reviewed International coauthorship International journal

    M. Ahankoub, A. Jahangiri, Y. Asahara, M. Moayyed

    Arabian Journal of Geosciences   Vol. 6   page: 4833 - 4849   2012.10

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Springer Nature  

    DOI: 10.1007/s12517-012-0680-9

  74. Contribution of detrital materials from the Yukon River to the continental shelf sediments of the Bering Sea based on the ESR intensity and crystallinity of quartz Reviewed International journal

    Kana Nagashima, Yoshihiro Asahara, Fumi Takeuchi, Naomi Harada, Shin Toyoda, Ryuji Tada

    Deep Sea Research II   Vol. 61-64   page: 145 - 154   2012.2

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    DOI: 10.1016/j.dsr2.2011.12.001

  75. Provenance of terrigenous detritus of the surface sediments in the Bering and Chukchi Seas as derived from Sr and Nd isotopes: implications for recent climate change in the Arctic regions Reviewed International journal

    Yoshihiro Asahara, Fumi Takeuchi, Kana Nagashima, Naomi Harada, Koshi Yamamoto, Kazumasa Oguri, Osamu Tadai

    Deep Sea Research II   Vol. 61-64   page: 155 - 171   2012.2

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier  

    DOI: 10.1016/j.dsr2.2011.12.004

  76. Another sea area separated from the Panthalassic Ocean in the Norian, the Late Triassic: the lowest Sr isotopic composition of the Ishimaki limestone in central Japan Reviewed International journal

    Kazuhiro Suzuki, Yoshihiro Asahara, Koichi Mimura, Tsuyoshi Tanaka

    Chemie der Erde   Vol. 72 ( 1 ) page: 77 - 84   2012.1

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier B.V.  

    DOI: 10.1016/j.chemer.2011.06.004

  77. Geochronological and geochemical constraints on the petrogenesis of high-K granite from the Suffi abad area, Sanandaj-Sirjan Zone, NW Iran Reviewed International coauthorship International journal

    Hossein Azizi, Yoshihiro Asahara, Behzad Mehrabi, Sun Lin Chung

    Chemie der Erde   Vol. 71 ( 4 ) page: 363 - 376   2011.12

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    DOI: 10.1016/j.chemer.2011.06.005

  78. Limits on conservative behaviour of Nd isotopes in seawater assessed from analysis of fish teeth from Pacific core tops Reviewed International coauthorship International journal

    Keiji Horikawa, Ellen E. Martin, Yoshihiro Asahara, Takuya Sagawa

    Earth and Planetary Science Letters   Vol. 310 ( 1-2 ) page: 119 - 130   2011.10

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    DOI: 10.1016/j.epsl.2011.07.018

  79. Discrimination of the age and tectonic setting for magmatic rocks along the Zagros thrust zone, northwest Iran, using the zircon U-Pb age and Sr-Nd isotopes Reviewed International coauthorship International journal

    Hossein Azizi, Tsuyoshi Tanaka, Yoshihiro Asahara, Sun Lin Chung, Mohammad Hussein Zarrinkoub

    Journal of Geodynamics   Vol. 52 ( 3-4 ) page: 304 - 320   2011.10

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    DOI: 10.1016/j.jog.2011.03.001

  80. Isotopic dating of the Khoy metamorphic complex (KMC), northwestern Iran: a significant revision of the formation age and magma source Reviewed International coauthorship International journal

    Hossein Azizi, Sun-Lin Chung, Tsuyoshi Tanaka, Yoshihiro Asahara

    Precambrian Research   Vol. 185 ( 3-4 ) page: 87 - 94   2011.3

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    DOI: 10.1016/j.precamres.2010.12.004

  81. Evaluation of Carbonation Process in Concrete with an Analysis of Carbon Isotopes Reviewed

    Cement Science and Concrete Technology   Vol. 64   page: 139 - 146   2010.12

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    DOI: 10.14250/cement.64.139

  82. La-Ce and Sm-Nd isotopic systematics of Early Proterozoic leucogranite with tetrad REE pattern Reviewed International coauthorship International journal

    Seung-Gu Lee, Yoshihiro Asahara, Tsuyoshi Tanaka, Nam Hoon Kim, Kun Han Kim, Keewook Yi, Akimasa Masuda, Yong Sun Song

    Chemical Geology   Vol. 276 ( 3-4 ) page: 360 - 373   2010.9

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    DOI: 10.1016/j.chemgeo.2010.07.003

  83. Intermediate Water formation in the Bering Sea during glacial periods: Evidence from neodymium isotope ratios Reviewed International journal

    Keiji Horikawa, Yoshihiro Asahara, Koshi Yamamoto, Yusuke Okazaki

    Geology   Vol. 38 ( 5 ) page: 435 - 438   2010.5

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:The Geological Society of America  

    DOI: 10.1130/G30225.1

  84. Rare earth element abundance, and Nd and oxygen isotope of HED meteorites International coauthorship

    Seung-Gu Lee, Yoshihiro Asahara, Insoo An, Kun-Han Kim, Tsuyoshi Tanaka, Seung-Ryeol Lee, Jong Ik Lee

    Journal of the Geological Society of Korea   Vol. 45 ( 6 ) page: 607 - 614   2009.12

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  85. Initial 87Sr/86Sr ratio heterogeneity in Kamihara Tonalite, Ryoke belt, southwest Japan: Evidence from strontium isotopic analysis of apatite Reviewed International journal

    Tsuboi, M., Asahara, Y.

    Journal of Mineralogical and Petrological Sciences   Vol. 104   page: 226 - 233   2009.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Japan Association of Mineralogical Sciences  

    DOI: 10.2465/jmps.080910

  86. Age and early metamorphic history of the Sambagawa belt: Lu-Hf and P-T constraints from the Western Iratsu eclogite Reviewed International coauthorship International journal

    Endo, S., Wallis, S., Hirata, T., Anczkiewicz, R., Platt, J., Thirlwall, M., Asahara, Y.

    Journal of Metamorphic Geology   Vol. 27 ( 5 ) page: 371 - 384   2009.6

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:John Wiley & Sons  

    DOI: 10.1111/j.1525-1314.2009.00821.x

  87. K-Ar ages of metamorphic clasts from the Miocene Aoiwa Conglomerate, Hiki Hills, Central Japan: Implications for exhumation history of source rocks Reviewed

    Arai, H., Takagi, H., Iwasaki, I., Asahara, Y., Takahashi, M.

    The Journal of the Geological Society of Japan   Vol. 115 ( 5 ) page: 223 - 241   2009.5

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:日本地質学会  

    DOI: 10.5575/geosoc.115.223

  88. Geochemical and isotopic constraints on the age and origin of the Nidar Ophiolitic Complex, Ladakh, India: Implicationsfor the Neo-Tethyan subduction along the Indus suture zone Reviewed International coauthorship International journal

    Ahmad, T., Tanaka, T., Sachan, H.K., Asahara, Y., Islam, R., and Khanna, P.P.

    Tectonophysics   Vol. 451 ( 1-4 ) page: 206 - 224   2008.4

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier B.V.  

    DOI: 10.1016/j.tecto.2007.11.049

  89. Geochemical mapping in Aichi prefecture, Japan: Its significance as a useful dataset for geological mapping Reviewed International journal

    Yamamoto, K., Tanaka, T., Minami, M., Mimura, K., Asahara, Y., Yoshida, H., Yogo, S., Takeuchi, M., Inayoshi, M.

    Applied Geochemistry   Vol. 22 ( 2 ) page: 306 - 319   2007.2

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier B.V.  

    DOI: 10.1016/j.apgeochem.2006.09.011

  90. Application of Sr isotopes to geochemical mapping and provenance analysis: the case of Aichi Prefecture, central Japan Reviewed International journal

    Asahara, Y., Ishiguro, H., Tanaka, T., Yamamoto, K., Mimura, K., Minami, M., Yoshida, H.

    Applied Geochemistry   Vol. 21 ( 3 ) page: 419 - 436   2006.3

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    DOI: 10.1016/j.apgeochem.2005.12.003

  91. Systematic variations in C, O, and Sr isotopes and elemental concentrations in Neoproterozoic carbonates in Namibia: implications for a glacial to interglacial transition Reviewed International journal

    Yoshioka, H., Asahara, Y., Tojo, B., Kawakami, S.

    Precambrian Research   Vol. 124 ( 1 ) page: 69 - 85   2003.6

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier B.V.  

    DOI: 10.1016/S0301-9268(03)00079-2

  92. Rare earth element and strontium isotopic study of seamount-type limestones in Mesozoic accretionary complex of Southern Chichibu Terrane, central Japan: Implication for incorporation process of seawater REE into limestones Reviewed International journal

    Tanaka, K., Miura, N., Asahara, Y., Kawabe, I.

    Geochemical Journal   Vol. 37 ( 2 ) page: 163 - 183   2003.4

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:The Geochemical Society of Japan  

    DOI: 10.2343/geochemj.37.163

  93. Chemical weathering of rocks in the view of Sr isotopic ratio : Study of groundwater at Kamaishi mine Reviewed

    Takagi, M., Tanaka, T., Asahara, Y., Aoki, K., Amano, K.

    Chikyukagaku (Geochemistry)   Vol. 35 ( 2 ) page: 61 - 72   2001.6

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Geochemical Society of Japan  

    DOI: 10.14934/chikyukagaku.35.61

  94. JNdi-1: a neodymium isotopic reference in consistency with LaJolla neodymium Reviewed International journal

    Tanaka, T., Togashi, S., Kamioka, H., Amakawa, H., Kagami, H., Hamamoto, T., Yuhara, M., Orihashi, Y., Yoneda, S., Shimizu, H., Kunimaru, T., Takahashi, K., Yanagi, T., Nakano, T., Fujimaki, H., Shinjo, R., Asahara, Y., Tanimizu, M. and Dragusanu, C.

    Chemical Geology   Vol. 168 ( 3-4 ) page: 279 - 281   2000.8

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier B.V.  

    DOI: 10.1016/S0009-2541(00)00198-4

  95. Stratigraphy and geologic age of the Neogene Shimajiri Group in Kumejima Island, Ryukyu Islands, southwestern Japan Reviewed

    Yodai Nakamura, Koji Kameo, Yoshihiro Asahara, Tomowo Ozawa

    The Journal of the Geological Society of Japan   Vol. 105 ( 11 ) page: 757 - 770   1999.11

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Geological Society of Japan  

    DOI: 10.5575/geosoc.105.757

    Other Link: https://www.jstage.jst.go.jp/article/geosoc1893/105/11/105_11_757/_pdf/-char/ja

  96. 87Sr/86Sr variation in north Pacific sediments : a record of the Milankovitch cycle in the past 3 million years Reviewed International journal

    Yoshihiro Asahara

    Earth and Planetary Science Letters   Vol. 171 ( 3 ) page: 453 - 464   1999.9

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:Elsevier B.V.  

    DOI: 10.1016/S0012-821X(99)00158-2

  97. Provenance of the Pacific sediments and process of source material transport as derived from Rb-Sr isotopic systematics Reviewed International journal

    Yoshihiro Asahara, Tsuyoshi Tanaka, Hikari Kamioka, Akira Nishimura and Toshitsugu Yamazaki

    Chemical Geology   Vol. 158 ( 3-4 ) page: 271 - 291   1999.6

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    DOI: 10.1016/S0009-2541(99)00056-X

  98. Geochemical map of the Ryoke grantic area in the northeastern part of Toyota City, Aichi Prefecture Reviewed

    The Journal of the Geological Society of Japan   Vol. 104 ( 10 ) page: 688 - 704   1998.10

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    DOI: 10.5575/geosoc.104.688

  99. A variety of 143Nd/144Nd ratio among six high purity neodymium oxide reagents Reviewed

    Tanaka, T., Tanimizu, M., Asahara, Y., Yonezawa, C., Togashi, S., Kamioka, H.

    Journal of the Mass Spectrometry Society of Japan   Vol. 44 ( 1 ) page: 79 - 83   1996.2

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:The Mass Spectrometry Society of Japan  

    DOI: 10.5702/massspec.44.79

    Other Link: https://www.jstage.jst.go.jp/article/massspec/44/1/44_1_79/_article/-char/ja

  100. Distributions of elements in stream sediments in and around Seto City, Aichi Prefecture : An attempt to a geoenvironmental assessment by geochemical mapping Reviewed

    Chikyukagaku (Geochemistry)   Vol. 29 ( 2 ) page: 113 - 125   1995.12

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    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:The Geochemical Society of Japan  

    DOI: 10.14934/chikyukagaku.29.113

    Other Link: https://www.jstage.jst.go.jp/article/chikyukagaku/29/2/29_KJ00007318814/_article/-char/ja/

  101. Asian continental nature 87Sr/86Sr ratios in north central Pacific sediments Reviewed International journal

    Asahara, Y., Tanaka, T., Kamioka, K., Nishimura, A.

    Earth and Planetary Science Letters   Vol. 133 ( 1-2 ) page: 105 - 116   1995.6

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    DOI: 10.1016/0012-821X(95)00048-H

  102. Origin of blueschist-facies clasts in the Mariana forearc, Western Pacific Reviewed International journal

    Yamamoto, K., Asahara, Y., Maekawa, H., Sugitani, K.

    Geochemical Journal   Vol. 29 ( 4 ) page: 259 - 275   1995.4

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    DOI: 10.2343/geochemj.29.259

  103. Analysis of rare earth elements in rock samples by ion chromatography using a-HIBA as an eluent Reviewed

    Yoshihiro Asahara, Tsuyoshi Tanaka, Hiroshi Yamamoto

    Journal of Mineralogy, Petrology and Economic Geology   Vol. 90 ( 4 ) page: 103 - 108   1995.4

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    Authorship:Lead author   Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Japan Association of Mineralogical Sciences  

    DOI: 10.2465/ganko.90.103

    Other Link: https://www.jstage.jst.go.jp/article/ganko/90/4/90_4_103/_article/-char/ja/

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Books 3

  1. Orbital-Scale Paleoceanographic Response to the Indian Monsoon in the Laxmi Basin of the Eastern Arabian Sea. . In: Zhang Z., Khélifi N., Mezghani A., Heggy E. (eds) Patterns and Mechanisms of Climate, Paleoclimate and Paleoenvironmental Changes from Low-Latitude Regions. Advances in Science, Technology & Innovation (IEREK Interdisciplinary Series for Sustainable Development). International journal

    Khim, B.K., Kim, J.E., Horikawa, K., Ikehara, M., Asahara, Y., Lee, J.M.( Role: Contributor)

    Springer  2019.1  ( ISBN:978-3-030-01599-2

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    Total pages:188   Language:English Book type:Scholarly book

  2. 地球環境学マニュアル2 −はかる・みせる・読みとく− 3.7章「地球化学図の作り方」

    浅原良浩( Role: Contributor)

    朝倉書店  2014.1  ( ISBN:4254180462

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    Language:Japanese Book type:Textbook, survey, introduction

  3. 環境学研究ソースブックー伊勢湾流域圏の視点から1-6章「地球化学図」

    田中剛、山本鋼志、南雅代、三村耕一、浅原良浩、吉田英一、稲吉正実( Role: Joint author)

    藤原書店  2005.12  ( ISBN:4-89434-492-0

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MISC 27

  1. 球状コンクリーションのSr同位体比による地質年代決定とその意義 Invited

    吉田英一,浅原良浩

    Isotope News   Vol. 765   page: 6 - 9   2019.10

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (other)   Publisher:公益社団法人日本アイソトープ協会  

    Other Link: https://www.jrias.or.jp/books/pdf/201910_RIYOGIJUTSU_YOSHIDA_HOKA.pdf

  2. 西アジアの古環境復元に向けて –イラン北西部のザグロス山脈に分布する石灰質化学沈殿岩の現地調査報告–

    淺原良浩, 南雅代, ラズーリ ハディ, アジジ ホセイン

    科研費新学術領域研究(研究領域提案型)都市文明の本質:古代西アジアにおける都市の発生と変容の学際研究1 研究成果報告2018年度     page: 143 - 148   2019.3

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    Authorship:Lead author   Language:Japanese  

    Other Link: http://rcwasia.hass.tsukuba.ac.jp/city/assets/img/Annual_volume_2018.pdf

  3. 清武・田野に分布する宮崎層群コンクリーション

    赤崎広志, 落合文登, 吉田英一, 浅原良浩

    宮崎の自然と環境   Vol. 3   page: 60 - 64   2018.12

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  4. Coral reef development of Minami-daito Island, Japan

    Shimazu, T., Yagi, M., Asahara, Y. and Matsuda, H.

    Chikyu monthly   Vol. 37 ( 12 ) page: 514 - 520   2018.12

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  5. The Hikami Granite revisited: Redetermination of Rb-Sr ages of the Ono type International coauthorship

    Asahara, Y., Shibata, K., Suzuki, K., Abdulzahra, I.K.

    The Nagoya University Bulletin of Chronological Research   Vol. 2   page: 57 - 60   2018.3

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  6. Age comparison between Matuyama-Brunhes geomagnetic polarity reversal and tektite fall International coauthorship

    Asahara, Y., Lee, S.-G., Minami, M., Choi, J., Nagao, K., Tanaka, T.

    The Nagoya University Bulletin of Chronological Research   Vol. 1   page: 72 - 77   2017.3

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  7. CHIME monazite ages of the Hikami Granite and the Ono Formation in the South Kitakami Terrane

    Suzuki, K., Shibata, K., Asahara, Y., Abdulzahra, I.K.

    Summaries of Researches Using AMS at Nagoya University (XXVII), Center for Chronological Research, Nagoya University   Vol. 27   page: 46-51   2016.3

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  8. ザグロス造山帯の火成作用と大陸地殻進化 –放射壊変系同位体を利用した火成活動時期とマグマ源の推定– Invited

    淺原良浩

    科学研究費補助金「新学術領域研究(研究領域提案型)」現代文明の基層としての古代西アジア文明 –文明の衝突論を克服するために– ニュースレター   ( 3 ) page: 20-22   2014.2

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  9. History of atmospheric lead deposition to a peat bog in Rishiri Island, Hokkaido, Japan

    Makiko Kono, Masaharu Tanimizu, Yoshihiro Asahara, Masayo Minami, Takanori Hosono, Toshio Nakamura

    Summaries of Researches Using AMS at Nagoya University (XXIII), Center for Chronological Research, Nagoya University   Vol. 23   page: 138-148   2012.3

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  10. Evaluation of carbonation process in concrete with analysis of carbon and oxygen isotopes

    Yoshihiro Asahara, Masayo Minami, Ippei Maruyama, Hidekazu Yoshida

    Summaries of Researches Using AMS at Nagoya University (XXII), Center for Chronological Research, Nagoya University   Vol. 22   page: 140-151   2011.3

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  11. Age determination of carbonation of concrete using radiocarbon

    Yoshihiro Asahara, Masayo Minami, Ippei Maruyama, Hidekazu Yoshida, Tsuyoshi Tanaka

    Summaries of Researches Using AMS at Nagoya University (XXI), Center for Chronological Research, Nagoya University   Vol. 21   page: 53-60   2010.3

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  12. 地圏環境における元素分布・循環の研究(IV) -同位体希釈放射化分析による白金族元素とレニウムの高確度定量-

    武田匡樹, 田中剛, 南雅代, 浅原良浩, 鈴木和博, 林和樹, 田中浩史

    平成21年度原子力機構施設利用総合共同研究成果報告集(東京大学大学院工学系研究科原子力専攻)     page: 57-71   2010

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  13. 地圏環境における元素分布・循環の研究(III) -ヒ素とクロム-

    伊藤知子, 田中剛, 南雅代, 山本鋼志, 浅原良浩, 三村耕一, 竹内誠, 柴田信之介, 小島久

    平成18年度原子力機構施設利用総合共同研究成果報告集(東京大学大学院工学系研究科原子力専攻)     page: 4.1.2   2007

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  14. Database of geochemical mapping of the northeastern areas of Aichi Prefecture, central Japan - XRF major element data of stream sediments collected in 1994 to 2004 - Reviewed

    Minami, M., Tanaka, T., Yamamoto, K., Mimura, K., Asahara, Y., Takeuchi, M., Yoshida, H., Yogo, S.

    The Journal of Earth and Planetary Sciences Nagoya University   Vol. 52   page: 25 - 67   2005.12

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    Language:English   Publishing type:Rapid communication, short report, research note, etc. (bulletin of university, research institution)   Publisher:Dept. of Earth and Planetary Sciences, Nagoya University  

    DOI: 10.18999/joueps.52.25

    Other Link: https://nagoya.repo.nii.ac.jp/records/6033#.YH1oDi_APUI

  15. Basic physical properties of sediment cores collected in the Chilean marginal area and Magellan Strait during leg.3 of cruise MR03-K04 International coauthorship

    Harada, N., Ahagon, N., Lange, C.B., Asahara, Y., Pantoja, S., Marchant, M., Mishima, T. Kanke, H., Tapia, R.I., Sepulueda, J., Santis, A.J.A., Katsuki, K., Matsuura, Y., Sato, Y., Maeda, R., Ueno, T., Tokunaga, W., Kimura, R., Nagahama, N.

    JAMSTEC Report of Research and Development   Vol. 2   page: 13 - 27   2005.4

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    Language:English   Publishing type:Rapid communication, short report, research note, etc. (bulletin of university, research institution)   Publisher:Japan Agency for Marine-Earth Science and Technology  

    DOI: 10.5918/jamstecr.2.13

  16. Rare earth element and Sr isotopic study of the Middle Permian limestone-dolostone sequence in Kuzuu area, central Japan: Seawater tetrad effect and Sr isotopic signatures of seamount-type carbonate rocks Reviewed

    Miura, N., Asahara, Y., Kawabe, I.

    The Journal of Earth and Planetary Sciences Nagoya University   Vol. 51   page: 11 - 35   2004.12

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    DOI: 10.18999/joueps.51.11

    Other Link: https://nagoya.repo.nii.ac.jp/records/6023#.YH1pjy_APUI

  17. 地圏環境における元素分布・循環の研究 -多試料多元素分析による愛知県東部の地圏化学環境評価の試み-

    田中剛、南雅代、山本鋼志、浅原良浩、三村耕一、仙田量子、 柴田信之介、武邊勝道、田中万也、林隆正、小島久

    平成15年度原研施設利用共同研究成果報告書(東京大学原子力研究総合センター)     page: 32-40   2004.4

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  18. An attempt to geoenvironmental assessment by geochemical mapping

    Tsuyoshi Tanaka, Koshi Yamamoto and Yoshihiro Asahara

      Vol. 24   page: 43-45   2001.8

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  19. Geochemical mapping:A fruitful field training

    Tsuyoshi Tanaka, Iwao Kawabe, Koshi Yamamoto, Koichi Mimura, Yoshihiro Asahara and Masayo Minami

    Chishitsu News   Vol. 558 ( 2 ) page: 41-47   2001.4

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  20. Multielement analysis in stream sediments by INAA for geoenvironmental assessment - chemical fractionation in oceanic sediment during porcellanitization -

    Takebe, K., Yamamoto, K., Tanaka, T., Asahara, Y., Mimura, K., Tanimizu, M., Kondo, M. and Shibata, S.

    Annual Report of the Inter-University Program for the Joint Use of Rikkyo University Reactor     page: 32-40   1999.3

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  21. Geoenvironmental Assessment with Geochemical Map Reviewed

    Bull. Nagoya Univ. Furukawa Museum   Vol. 14   page: 125-133   1998.12

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  22. Geochemical mapping of the northern area of Toyoda City, Aichi Prefecture, Central Japan : Distinct chemical characteristics of stream sediments between granitic and sedimentary rock areas Reviewed

    Tanaka, T., Kawabe, I., Yamamoto, K., Iwamori, H., Hirahara, Y., Mimura, K., Asahara, Y., Minami, M., Ito, T., Dragusanu, C., Miura, N., Aoki, H., Ohta, A., Togami, K., Toriumi, T., Matsumura, Y., Sakakibara, T., Tanimizu, M., Mizutani, Y., Miyanaga, N., Murayama, M., Takayanagi, Y.

    The Journal of Earth and Planetary Sciences Nagoya University   Vol. 43   page: 27 - 47   1996.12

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    Language:English   Publishing type:Rapid communication, short report, research note, etc. (bulletin of university, research institution)   Publisher:Dept. of Earth and Planetary Sciences, Nagoya University  

    DOI: 10.18999/joueps.43.27

    Other Link: https://nagoya.repo.nii.ac.jp/records/1419#.YH1rui_APUI

  23. Cyclical variations of 87Sr/86Sr ratio in the north central Pacific sediment during the Quaternary

    Asahara, Y., Tanaka, T., Kamioka, H., Nishimura, A.

    Todai International Symposium on Cosmochronology and Isotope Geoscience     page: 78 - 81   1996.1

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    Authorship:Lead author   Language:English   Publishing type:Research paper, summary (international conference)  

  24. Geochemical survey of the Sanage-yama area in Aichi Prefecture for enviromental assessment Reviewed

    Tanaka, T., Kawabe, I., Hirahara, Y., Iwamori, H., Mimura, K., Sugisaki, R., Asahara, Y., Ito, T., Yarai, H., Yonezawa, C., Kanda, S., Shimizu, O., Hayashi, M., Miura, N., Mutoh, K., Ohta, A., Sugimura, K., Togami, K., Toriumi, T., Matsumura, Y.

    The Journal of Earth and Planetary Sciences Nagoya University   Vol. 41   page: 1 - 31   1994.12

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    Language:English   Publishing type:Rapid communication, short report, research note, etc. (bulletin of university, research institution)   Publisher:Dept. of Earth and Planetary Sciences, Nagoya University  

    DOI: 10.18999/joueps.41.1

    Other Link: https://nagoya.repo.nii.ac.jp/records/1407#.YH1sUC_APUI

  25. Continental nature of 87Sr/86Sr ratios in the north central Pacific sediments

    Asahara, Y., Tanaka, T., Kamioka, H. and Nishimura, A.

    U. S. Geological Survey Circular   Vol. 1107   page: 14   1994.6

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  26. Desert is a potential sink of CO2: isotopic evidence

    Tanaka, T., Inayama, E. and Asahara, Y.

    U.S. Geological Survey Circular   Vol. 1107   page: 315   1994.6

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  27. Desert is a potential sink of CO2

    Summaries of Researches Using AMS at Nagoya University (V), Dating and Materials Research Center, Nagoya University   Vol. 5   page: 184-188   1994.3

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Presentations 185

  1. Radiocarbon ages and geochemical record for a travertine hill in NW Iran International coauthorship

    Zhang, Y.B., Asahara, Y., Minami, M., Kaneko, M., Amin-Rasouli, H., Azizi, H.

    The 32nd Symposium on Chronological Studies at the Division for Chronological Research, Institute for Space-Earth Environmental Research Nagoya University in 2020  2021.3.5 

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    Event date: 2021.3

    Language:English   Presentation type:Oral presentation (general)  

    Venue:virtual meeting (Nagoya University)   Country:Japan  

  2. イラン北西部のトラバーチン湧水中のヒ素の起源解析 International coauthorship

    金子将己, 淺原良浩, 南雅代, 栗田直幸, Hossein Azizi, Hadi Amin-Rasouli, 張玉博

    2020年度名古屋大学宇宙地球環境研究所年代測定研究シンポジウム 

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    Event date: 2021.3

    Language:English   Presentation type:Oral presentation (general)  

    Venue:オンライン(名古屋大学)   Country:Japan  

  3. Paleoenvironmental reconstruction of northwest Iran based on 14C age and chemical compositions of travertines International coauthorship

    Zhang, Y.B., Asahara, Y., Minami, M., Kaneko, M., Amin-Rasouli, H., Azizi, H.

    Annual Meeting of the Geochemical Society of Japan 

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    Event date: 2020.11

    Language:English   Presentation type:Poster presentation  

    Venue:virtual meeting   Country:Japan  

    CiNii Article

  4. 鉛同位体比を用いた大阪湾堆積物中の鉛の起源解明

    伊藤健太, 淺原良浩, 山本鋼志

    日本地球化学会第67回年会 

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    Event date: 2020.11

    Language:Japanese   Presentation type:Poster presentation  

    Venue:オンライン   Country:Japan  

    CiNii Article

  5. Sr,Nd同位体比と微量元素組成を指標とした西部北太平洋亜寒帯の沈降粒子中の陸源砕屑物の供給源解析

    宇佐見直也,淺原良浩,長島佳菜,藤木徹一

    日本地球化学会第67回年会 

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    Language:Japanese   Presentation type:Poster presentation  

    Venue:オンライン   Country:Japan  

    CiNii Article

  6. イラン北西部のトラバーチン湧水の同位体地球化学的評価 International coauthorship

    金子将己, 淺原良浩, 南雅代, 栗田直幸, Hossein Azizi, Hadi Amin-Rasouli, 張玉博

    日本地球化学会第67回年会 

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    Event date: 2020.11

    Language:English   Presentation type:Poster presentation  

    Venue:オンライン   Country:Japan  

    CiNii Article

  7. Sr同位体比による炭酸塩コンクリーションの年代決定 International coauthorship

    淺原良浩, 吉田英一, 山本鋼志, 勝田長貴, 南雅代, Metcalfe, Richard

    日本地球化学会第67回年会 

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    Event date: 2020.11

    Language:Japanese   Presentation type:Poster presentation  

    Venue:オンライン   Country:Japan  

    CiNii Article

  8. Highly metasomatised mantle as the main sources of Paleogene volcanism in the Saveh area, central Iran International coauthorship

    Nouri, F., Azizi, H., Asahara, Y., Stern, R.

    Annual Meeting of the Geochemical Society of Japan 

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    Event date: 2020.11

    Language:English   Presentation type:Poster presentation  

    Venue:virtual meeting   Country:Japan  

    CiNii Article

  9. Genesis of the phlogopite pegmatite in the Ghareh Bagh area, northwest Iran, using the apatite chemistry International coauthorship

    Daneshvar, N., Azizi, H., Asahara, Y., Tsuboi, M., Hosseini, M.

    Annual Meeting of the Geochemical Society of Japan 

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    Event date: 2020.11

    Language:English   Presentation type:Poster presentation  

    Venue:virtual meeting   Country:Japan  

    CiNii Article

  10. Geochemistry and geodynamic of the Early Cretaceous granitoid, northern Sanadaj-Sirjan Zone, NW Iran International coauthorship

    Gholipour, S., Azizi, H., Masoudi, F., Asahara, Y., Tsuboi, M.

    Annual Meeting of the Geochemical Society of Japan 

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    Event date: 2020.11

    Language:English   Presentation type:Poster presentation  

    Venue:virtual meeting   Country:Japan  

    CiNii Article

  11. ICP-MSを用いたカンラン石中の微量元素の定量分析

    小坂由紀子, 加藤丈典, 道林克禎, 纐纈佑衣, 淺原良浩

    日本地球化学会第67回年会 

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    Event date: 2020.11

    Language:Japanese   Presentation type:Poster presentation  

    Venue:オンライン   Country:Japan  

    CiNii Article

  12. Carbon and oxygen isotopes and 14C age of travertine and spring water in NW Iran International coauthorship International conference

    Zhang, Y.B., Asahara, Y., Kaneko, M., Minami, M., Amin-Rasouli, H., Azizi, H.

    JpGU-AGU Joint Meeting 2020 

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    Event date: 2020.7

    Language:English   Presentation type:Poster presentation  

    Venue:virtual meeting   Country:Japan  

  13. Geochemical and isotopic constraints on origin of the Cenozoic granitoid bodies in the Zagros orogen, NW Iran International coauthorship

    Rezaei, F., Asahara, Y., Yamamoto, K., Azizi, H.

    Workshop on Isotope-Ratio Mass Spectrometry 

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    Event date: 2019.11

    Language:English   Presentation type:Poster presentation  

    Venue:Noboribetsu, Hokkaido   Country:Japan  

  14. Evolution process of tectonics and carbonate build-up & shoal in the RMK inversion zone, East Java, Indonesia

    Yagi, M., Shimazu, T., Ichimaru, Y., Matsumaru, K., Asahara, Y.

    Annual Meeting of the Geological Society of Japan 

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    Event date: 2019.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  15. Sr and Nd isotopic variations of settling particles in western subarctic Pacific.

    Usami Naoya, Asahara Yoshihiro, Nagashima Kana, Fujiki Tetsuichi

    2019 Annual Meeting of the Geochemical Society of Japan 

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    Event date: 2019.9

    Language:Japanese   Presentation type:Poster presentation  

    <p></p>

    DOI: 10.14862/geochemproc.66.0_75

    CiNii Article

  16. 14C ages and chemical compositions of travertines in northwest Iran: An attempt on paleoenvironmental reconstruction in west Asia International coauthorship

    Yubo Zhang, Asahara Yoshihiro, Minani Masayo, Rasouli Hadi, Azizi Hossein

    Annual Meeting of the Geochemical Society of Japan 

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    Event date: 2019.9

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

    <p></p>

    DOI: 10.14862/geochemproc.66.0_99

    CiNii Article

  17. イラン・ザンジャン州の磁鉄鉱-燐灰石鉱床の鉱石および母岩の化学組成とSr-Nd-Fe 同位体組成

    淺原良浩

    科研費新学術領域研究(研究領域提案型)「都市文明の本質:西アジアにおける都市の発生と変容の学際研究」B01-計画研究04 第2回研究会「古代西アジアをめぐる水と土と都市の相生・相克と 都市鉱山の起源」 

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    Event date: 2019.8

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  18. Generalized condition of spherical carbonate concretion formation and its application

    Yoshida, H., Asahara, Y., Oji, M.

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    Event date: 2019.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:Shizuoka University   Country:Japan  

  19. Age determination of spherical carbonate concretions by Sr isotope stratigraphy

    Asahara, Y., Yoshida, H., Yamamoto, K., Katsuta, N., Minami, M,, Metcalfe, R.

    Japan Geoscience Union Meeting 2019 

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    Event date: 2019.5

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  20. Zircon U-Pb dating and geochemical study on Cenozoic granitoids in the northern Sanandaj-Sijan Zone, Zagros Orogen, NW Iran

    Rezaei, F., Azizi, H., Asahara, Y., Yamamoto, K.

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    Event date: 2019.1 - 2019.2

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  21. Land-sea interaction and Indian monsoon in the Mahanadi Basin of the Bay of Bengal (IODP Site U1445) during the last 200 ka International conference

    Jongmin Lee, Boo-Keun Khim, Sunghan Kim, Minoru Ikehara, Keiji Horikawa, Yoshihiro Asahara, Hyen Goo Cho, Hyojin Koo

    AGU Fall Meeting 

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    Event date: 2018.12

    Language:English   Presentation type:Poster presentation  

    Venue:Washington D.C., USA   Country:United States  

  22. 伊豆半島の石灰岩岩相と年代に係る新知見

    八木正彦, 松丸国照, 淺原良浩

    日本地質学会第125回学術大会(つくば特別大会) 

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    Event date: 2018.12

    Language:Japanese   Presentation type:Poster presentation  

    Venue:産業技術総合研究所つくば本部(つくば市)   Country:Japan  

  23. Chemical characterization of B-Tm tephra (Millennium Eruption, Changbaishan volcano) of the lacustrine sediment core using XRF, ICP-MS, and LA-ICP-MS International conference

    Nara, F.W., Yokoyama, T., Yamasaki, S., Minami, M., Asahara, Y., Watanabe, T., Yamada, K., Tsuchiya, N., Yasuda, Y.

    3rd Korea-Japan Joint Workshop on Isotope-Ratio Mass Spectrometry 

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    Event date: 2018.11

    Language:English   Presentation type:Poster presentation  

    Venue:Young Hotel (Daejeon, Korea)   Country:Korea, Republic of  

  24. Strontium and neodymium isotopic constraints on the origin of IOA deposit in Zanjan, Iran International conference

    Asahara, Y., Mano, K., Tsuboi, M., Azizi, H., Shin, K.C., Lee, S.G.

    3rd Korea-Japan Joint Workshop on Isotope-Ratio Mass Spectrometry 

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    Event date: 2018.11

    Language:English   Presentation type:Poster presentation  

    Venue:Young Hotel (Daejeon, Korea)   Country:Korea, Republic of  

  25. Atmospheric CO2 drop induced by flood basalt weathering in the mid-Miocene: Nd isotope records from ODP site 1120

    2018 Annual Meeting of the Geochemical Society of Japan 

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    Event date: 2018.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

    DOI: 10.14862/geochemproc.65.0_19

    CiNii Article

  26. Chemical and Sr-Nd-Fe isotopic compositions of ore minerals and host rocks of the IOA deposit in Zanjan, Iran

    2018 Annual Meeting of the Geochemical Society of Japan 

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    Event date: 2018.9

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

    DOI: 10.14862/geochemproc.65.0_117

    CiNii Article

  27. Geochemical constraints on Cenozoic granitoid magmatism in the northern Sanandaj-Sijan Zone, Zagros Orogen, NW Iran

    Rezaei, F., Azizi, H., Asahara, Y., Yamamoto, K.

    2018 Annual Meeting of the Geochemical Society of Japan 

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    Event date: 2018.9

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  28. Formation process for spherical carbonate and iron concretions

    Yoshida, H., Yamamoto, K., Hasegawa, H., Katsuta, N., Sirono, S., Maruyama, I., Minami, M., Asahara, Y., Yamaguchi, Y., Nishimoto, S., Ichinnorov, N., Metcalfe, R.

    Japan Geoscience Union Meeting 2018 

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    Event date: 2018.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  29. Sr-Nd-Fe isotopic constraints on the origin of Kiruna-type deposit in Zanjan, NW Iran

    Asahara, Y., Mano, K., Tsuboi, M., Azizi, H., Shin, K.-C, Lee, S.G.

    Japan Geoscience Union Meeting 2018 

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    Event date: 2018.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  30. Geochemical and Sr-Nd isotopic constraints on origin of the Marivan granitoid body, northwest Iran

    Rezaei, F., Azizi, H., Asahara, Y., Yamamoto, K.

    Japan Geoscience Union Meeting 2018 

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    Event date: 2018.5

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  31. Mid-Miocene Nd isotope record from ODP 1120: Flood basalt weathering induced pCO2 drop?

    Horikawa, K., Khim, B.K., Asahara, Y.

    Japan Geoscience Union Meeting 2018 

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    Event date: 2018.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  32. 地球の鉄コンクリーションの形成メカニズムから読み解く火星の表層環境史

    長谷川精, 吉田英一, 勝田長貴, 城野信一, 丸山一平, 南雅代, 淺原良浩, 西本昌司, 山口靖, Ichinnorov, Niiden, Metcalfe, Richard

    日本地球惑星科学連合2018年大会 

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    Event date: 2018.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:幕張メッセ (千葉)   Country:Japan  

  33. 伊豆半島の石灰岩の岩相と年代

    八木正彦, 松丸国照, 淺原良浩

    日本堆積学会 炭酸塩コロキウム2018 in 天草 

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    Event date: 2018.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:天草市 熊本大学研修センター   Country:Japan  

  34. キルナ型鉱床の成因に関するSr-Nd-Fe同位体組成からの制約

    眞野航大, 淺原良浩, 壷井基裕, Azizi, H., 申 基澈, Lee, S.G.

    2017年度名古屋大学宇宙地球環境研究所年代測定研究シンポジウム 

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    Event date: 2018.2

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学   Country:Japan  

  35. イラン・ザンジャン地域のキルナ型鉱床のSr-Nd-Fe同位体分析

    眞野航大, 淺原良浩, 壷井基裕, AZIZI, H., 申基澈

    第7回 同位体環境学シンポジウム 

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    Event date: 2017.12

    Language:Japanese   Presentation type:Poster presentation  

    Venue:総合地球環境学研究所 講演室   Country:Japan  

  36. An isotopic study of mafic microgranular enclaves in the Katsuragi adakitic tonalite, southwestern Japan International conference

    Naoki Tezuka, Motohiro Tsuboi, Yoshihiro Asahara

    AGU Fall Meeting 

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    Event date: 2017.12

    Language:English   Presentation type:Poster presentation  

    Country:United States  

  37. Sediment provenance in the Laxmi Basin of the Arabian Sea during the last 800 kyrs International conference

    Boo-Keun Khim, Keiji Horikawa, Yoshihiro Asahara, Ji-Eun Kim, Minoru Ikehara, Jongmin Lee

    AGU Fall Meeting 

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    Event date: 2017.12

    Language:English   Presentation type:Poster presentation  

    Country:United States  

  38. Japan Sea opening-closing history over the last 10 Myr inferred from Nd isotopes: Relationship to tectonics of Hokkaido and Northeast Japan arc

    Kozaka, Y., Horikawa, K., Asahara, Y.

    Annual Meeting of the Geological Society of Japan 

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    Event date: 2017.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

    DOI: 10.14863/geosocabst.2017.0_048

    CiNii Article

  39. Petrological and geochemical characteristics of a Kiruna-type deposit in NW Iran

    Mano, K., Asahara, Y., Tsuboi, M., Azizi, H., Shin, K.

    64th Annual Meeting of the Geochemical Society of Japan 

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    Event date: 2017.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    DOI: 10.14862/geochemproc.64.0_24

    CiNii Article

  40. A donation of textbook on geosciences to University of Kurdistan, Iran.

    Tanaka, T., Asahara, Y., Minami, M.

    64th Annual Meeting of the Geochemical Society of Japan 

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    Event date: 2017.9

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

    DOI: 10.14862/geochemproc.64.0_124

    CiNii Article

  41. Sr and Nd isotope ratios of the settling terrigenous matters in the Canada Basin of the Arctic Ocean: Similarity and difference between the particles from the surface and deeper layers

    Asahara, Y., Takeuchi, S., Harada, N., Onodera, J., Nagashima, K.

    64th Annual Meeting of the Geochemical Society of Japan 

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    Event date: 2017.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

    DOI: 10.14862/geochemproc.64.0_93

    CiNii Article

  42. Preliminary analysis of Kiruna-type deposit formation with the use of Sr isotope and REE patterns

    Mano, K., Asahara, Y., Tsuboi, M., Azizi, H.

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    Event date: 2017.6

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  43. Chemostratigraphy of the Upper Jurassic-Lower Cretaceous carbonates in the southern Arabian Gulf region

    Yano, M., Takayanagi, H., Ishida, K., Yamamoto, K., Asahara, Y., Sato, T., Iryu, Y.

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    Event date: 2017.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  44. アラビア湾南岸に分布する下部白亜系炭酸塩岩の堆積環境および年代

    高柳栄子, 矢野元康, 石田圭四郎, 淺原良浩, 山本鋼志, 佐藤時幸, 井龍康文

    石油技術協会 平成29年度春季講演会 

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    Event date: 2017.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:国立オリンピック記念青少年総合センター   Country:Japan  

  45. 北極海チュクチ海陸棚域からカナダ海盆に運び出される粒子態鉄 ー鉄とネオジム同位体による起源解析ー

    淺原良浩, 竹内晟也, 安田友紀, 原田尚美, 小野寺丈尚太郎, 長島佳菜, 申基澈

    第6回 同位体環境学シンポジウム 

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    Event date: 2016.12

    Language:Japanese   Presentation type:Poster presentation  

    Venue:総合地球環境学研究所 講演室   Country:Japan  

  46. Rb-Sr, Sm-Nd whole rock and mineral isochrons for Ebrahim Attar granite (NW Iran) International conference

    Mohammadi, K., Azizi, H., Asahara, Y., Tsuboi, M., Daneshvar, N., Mehrabi, B.

    2016 Iran-Japan Joint International Workshop on Isotope Geology 

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    Event date: 2016.10

    Language:English   Presentation type:Poster presentation  

    Venue:University of Kurdistan (Sanandaj, Iran)   Country:Iran, Islamic Republic of  

  47. New ages for Panjeh complex, southwest Ghorveh (NW Iran) International conference

    Hassannejhad, S., Azizi, Hossein, Asahara, Y.

    2016 Iran-Japan Joint International Workshop on Isotope Geology 

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    Event date: 2016.10

    Language:English   Presentation type:Poster presentation  

    Venue:University of Kurdistan (Sanandaj, Iran)   Country:Iran, Islamic Republic of  

  48. Petrogenesis of magnetite-apatite deposit in Zanjan, NW Iran, using Sr and Nd isotopes and REE pattern International conference

    Mano, K., Asahara, Y., Tsuboi, M., Azizi, H.

    2016 Iran-Japan Joint International Workshop on Isotope Geology 

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    Event date: 2016.10

    Language:English   Presentation type:Poster presentation  

    Venue:University of Kurdistan (Sanandaj, Iran)   Country:Iran, Islamic Republic of  

  49. Zircon U-Pb dating for Paleozoic granite in southeast Saqqez (NW Iran) International conference

    Kazemi, T., Azizi, Hossein, Asahara, Y.

    2016 Iran-Japan Joint International Workshop on Isotope Geology 

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    Event date: 2016.10

    Language:English   Presentation type:Poster presentation  

    Venue:University of Kurdistan (Sanandaj, Iran)   Country:Iran, Islamic Republic of  

  50. Raidogenic and stable isotopes as tracers: Application to paleocenography and environmental analysis, using marine sediments in Pacific, Okhotsk Sea, Bering Sea and Arctic Sea Invited International conference

    Asahara, Y.

    2016 Iran-Japan Joint International Workshop on Isotope Geology 

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    Event date: 2016.10

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:University of Kurdistan (Sanandaj, Iran)   Country:Iran, Islamic Republic of  

  51. Principles and applications of radiogenic isotopes International conference

    Asahara, Y.

    2016 Iran-Japan Joint International Workshop on Isotope Geology 

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    Event date: 2016.10

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:University of Kurdistan (Sanandaj, Iran)   Country:Iran, Islamic Republic of  

  52. Collaborative education on "Geochemical Experiment" and "Geological Survey" for undergraduate students in Earth Science department, Nagoya University, Japan Invited International conference

    Asahara, Y., Mimura, K., Minami, M., Yamamoto, K.

    2016 Iran-Japan Joint International Workshop on Isotope Geology 

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    Event date: 2016.10

    Language:English   Presentation type:Poster presentation  

    Venue:University of Kurdistan (Sanandaj, Iran)   Country:Iran, Islamic Republic of  

  53. Geochemical Mapping of Sr isotopic ratio in the northeastern part of Aichi Prefecture, central Japan International conference

    Asahara, Y., Ishiguro, H., Tanaka, T., Yamamoto, K., Mimura, K., Minami, M., Yoshida, H.

    2016 Iran-Japan Joint International Workshop on Isotope Geology 

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    Event date: 2016.10

    Language:English   Presentation type:Poster presentation  

    Venue:University of Kurdistan (Sanandaj, Iran)   Country:Iran, Islamic Republic of  

  54. Sr、Nd同位体比および希土類元素組成を利用した磁鉄鉱−リン灰石鉱床の成因解析

    眞野航大・淺原良浩・壷井基裕・Azizi, Hossein

    2016年度日本地球化学会第63回年会 

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    Event date: 2016.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:大阪市立大学   Country:Japan  

  55. 北極海カナダ海盆西部域に流入する陸源砕屑粒子のSr-Nd同位体比と化学組成の年変化

    竹内晟也・淺原良浩・原田尚美・小野寺丈尚太郎・長島佳菜

    2016年度日本地球化学会第63回年会 

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    Event date: 2016.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:大阪市立大学   Country:Japan  

  56. Magnesium and oxygen isotope composition of the Muamsa and Weolaksan granites, Okcheon belt, Korea

    Seung-Gu Lee, Insu Ahn, Yoshihiro Asahara, Tsuyoshi Tanaka, Seung Ryeol Lee

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    Event date: 2016.9

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  57. 過去100万年間のネオジム同位体比変化から推察される日本海盆・大和海盆の形成史

    小坂由紀子・堀川恵司・淺原良浩・張勁

    2016年度日本地球化学会第63回年会 

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    Event date: 2016.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:大阪市立大学   Country:Japan  

  58. アラビア湾南岸地域におけるバレミアン階炭酸塩岩の化学層序

    水島大輔・高柳栄子・石田圭史郎・淺原良浩・山本鋼志・佐藤時幸・井龍康文

    日本地質学会第123年学術大会 

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    Event date: 2016.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:日本大学文理学部キャンパス   Country:Japan  

  59. 大阪府南部金剛山地に分布する葛城トーナル岩中の暗色包有物の成因

    手塚直希・壷井基裕・淺原良浩

    日本地質学会第123年学術大会 

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    Event date: 2016.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:日本大学文理学部キャンパス   Country:Japan  

  60. Historical development of 138Ce/142Ce analysis and applications of La-Ce isotope systematics International conference

    Tanimizu, M., Asahara, Y., Tanaka, T.

    Goldschimdt Conference 2016 

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    Event date: 2016.6 - 2016.7

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  61. Collaborative education on "Geochemical Experiment" and "Geological Survey" for undergraduate students in Earth Science department Invited International conference

    Asahara, Y., Mimura, K., Minami, M., Yamamoto, K.

    Goldschimdt Conference 2016 

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    Event date: 2016.6 - 2016.7

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  62. A combined chemical and Sr-Nd isotopic study on terrigenous supply to the western Arctic Ocean International conference

    Takeuchi, S., Asahara, Y., Harada, N., Onodera, J., Nagashima, K.

    Goldschimdt Conference 2016 

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    Event date: 2016.6 - 2016.7

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  63. Coastal hydrothermal field was hot spot for biotic diversity on the Paleoarchean Earth International conference

    Sugitani, K., Mimura, K., Takeuchi, M., Yamaguchi, T., Suzuki, K., Senda, R., Asahara, Y., Wallis, S., Van Kranendonk, M.J.

    Goldschimdt Conference 2016 

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    Event date: 2016.6 - 2016.7

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  64. アラビア湾南岸に分布するバレミアン階炭酸塩岩の炭素同位体層序

    水島 大輔, 高柳 栄子, 石田 圭史郎, 浅原 良浩・山本 鋼志, 佐藤 時幸, 井龍 康文

    平成28年度 石油技術協会 春季講演会 

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    Event date: 2016.6

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:秋田ビューホテル(秋田市)   Country:Japan  

  65. Brucite as an important phase in the mantle wedge: evidence from the Sanbagawa belt, SW Japan

    Wallis, S., Endo, S., Kawahara, H., Nagaya, T., Mori, H., Asahara, Y.

    Japan Geoscience Union Meeting 2016 

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    Event date: 2016.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  66. Provenance analysis of aluminosilicate detritus in marine environment by Sr-Nd isotopes: terrigenous input from the Amur River to the Sea of Okhotsk and the western subarctic Pacific

    Asahara, Y., Yasuda, T., Ichikawa, R., Nakatsuka, T., Minami, H., Nagao, S., Nishioka, J.

    Japan Geoscience Union Meeting 2016 

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    Event date: 2016.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  67. Paleo- and modern environmental analysis based on chemical and Sr-Nd isotopic compositions of aluminosilicate detritus in the Arctic and Sub-Arctic Seas International conference

    Asahara, Y., Yasuda, T., Takeuchi, S., Takeuchi, F.

    The 2016 ESSAS (Ecosystem Studies of Sub-Arctic and Arctic Seas) Annual Science Meeting 

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    Event date: 2016.3

    Language:English   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  68. 同位体分析による海洋の鉄の起源推定

    淺原良浩, 竹内晟也, 安田友紀, 原田尚美, 小野寺丈尚太郎, 長島佳菜, 申基澈

    第5回 同位体環境学シンポジウム 

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    Event date: 2015.12

    Language:Japanese   Presentation type:Poster presentation  

    Venue:総合地球環境学研究所 講演室   Country:Japan  

  69. 只見川古期花崗岩類の放射年代学

    若杉勇輝、谷岡裕太、壷井基裕、浅原良浩

    2015年度日本質量分析学会同位体比部会 

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    Event date: 2015.11

    Language:Japanese   Presentation type:Poster presentation  

    Venue:滋賀県大津市   Country:Japan  

  70. 南部北上帯、氷上花崗岩と大野層の年代

    鈴木和博、柴田賢、浅原良浩、アブドゥルザーラ イマド カディム

    2015年度日本質量分析学会同位体比部会 

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    Event date: 2015.11

    Language:Japanese   Presentation type:Poster presentation  

    Venue:滋賀県大津市   Country:Japan  

  71. DSDP296コアのSr同位体層序

    堀川恵司, 後藤葵, 浅原良浩, 岡崎裕典

    2015年度地球環境史学会年会 

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    Event date: 2015.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京大学本郷キャンパス   Country:Japan  

  72. Sr、Nd同位体比と微量元素組成を用いた北極海カナダ海盆西部域の沈降粒子中の珪酸塩砕屑粒子の起源解析

    竹内晟也・淺原良浩・原田尚美・長島佳菜・小野寺丈尚太郎

    2015年度日本地球化学会第62回年会 

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    Event date: 2015.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:横浜国立大学   Country:Japan  

  73. 鉄安定同位体比を用いた海洋沈降粒子中の鉄の起源解析

    淺原良浩・竹内晟也・安田友紀・原田尚美・小野寺丈尚太郎・長島佳菜・申基澈

    2015年度日本地球化学会第62回年会 

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    Event date: 2015.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:横浜国立大学   Country:Japan  

  74. Petrogenesis of I- and A-type granitoid plutons in the Shalair Valley area of the Zagros Suture Zone, NE Iraq

    Kadhim, I., Hadi, A., Asahara, Y., Yamamoto, K.

    62nd Annual Meeting of the Geochemical Society of Japan 

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    Event date: 2015.9

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  75. Hikami Granite revisited

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    Event date: 2015.9

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  76. 三波川沈み込み帯浅部マントルウェッジ中のブルース石の重要性を示す岩石学的・野外地質学的証拠

    河原弘和, 遠藤俊祐, ウォリス サイモン, 永冶方敬, 森宏, 山本鋼志, 淺原良浩

    日本地質学会第122年学術大会 

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    Event date: 2015.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:信州大学 長野(工学)キャンパス   Country:Japan  

  77. 沖縄県南大東島大東層における上部中新統〜鮮新統炭酸塩岩の堆積様式とドロマイト化作用

    島津崇, 橋本直明, 水永泰介, 松田博貴, 淺原良浩, 八木正彦

    日本地質学会第122年学術大会 

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    Event date: 2015.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:信州大学 長野(工学)キャンパス   Country:Japan  

  78. Carbonate depositional system and distribution of dolomite of a carbonate buildup - an example from the Upper Miocene to Pleistocene Daito Formation (Minami-daito-jima, southwestern Japan) International conference

    Shimazu, T, Matsuda, H., Asahara, Y., Yagi, M.

    15th Bathurst Meeting 

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    Event date: 2015.7

    Language:English   Presentation type:Poster presentation  

    Country:United Kingdom  

  79. Reconsideration of serpentinite in the shallow wedge mantle -Importance of brucite-

    Kawahara, H., Endo, S., Wallis, S., Nagaya, T., Mori, H., Yamamoto, K., Asahara, Y.

    Japan Geoscience Union Meeting 2015 

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    Event date: 2015.5

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  80. 北極海の沈降粒子中の鉄の安定同位体比とSr、Ndの放射壊変起源同位体比

    淺原良浩・竹内晟也・安田友紀・原田尚美・長島佳菜・小野寺丈尚太郎・申基澈

    日本海洋学会2015年度春季大会 

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    Event date: 2015.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京海洋大学品川キャンパス   Country:Japan  

  81. Sr、Nd同位体と希土類元素組成を用いた北極海カナダ海盆西部域の珪酸塩砕屑粒子の起源および季節変動の解析

    竹内晟也・淺原良浩・原田尚美・長島佳菜・小野寺丈尚太郎

    日本海洋学会2015年度春季大会 

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    Event date: 2015.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京海洋大学品川キャンパス   Country:Japan  

  82. 鉄同位体を利用した古海洋環境復元の試み

    田中啓, 安田友紀, 鈴木和博, 久保貴志, 申基澈, 高柳栄子, 井龍康文, 淺原良浩

    第4回 同位体環境学シンポジウム 

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    Event date: 2014.12

    Language:Japanese   Presentation type:Poster presentation  

    Venue:総合地球環境学研究所 講演室   Country:Japan  

  83. 北極海カナダ海盆西部域の沈降粒子の鉄同位体分析

    竹内晟也, 安田友紀, 原田尚美, 長島佳菜, 小野寺丈尚太郎, 申基澈, 淺原良浩

    第4回 同位体環境学シンポジウム 

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    Event date: 2014.12

    Language:Japanese   Presentation type:Poster presentation  

    Venue:総合地球環境学研究所 講演室   Country:Japan  

  84. 西南日本内帯 東部因美迸入岩類の花崗岩類のSr, Nd同位体組成

    佐藤桂, 亀井淳志, 南雅代, 淺原良浩, 加藤丈典

    日本鉱物科学会 2014年年会 

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    Event date: 2014.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:熊本大学   Country:Japan  

  85. Sr、Nd同位体比と化学組成から読み解くオホーツク海北西陸棚域におけるアムール川起源砕屑物の分布と輸送過程

    安田友紀, 淺原良浩, 市川諒, 中塚武, 西岡純, 南秀樹, 長尾誠也

    2014年度 日本地球化学会第61回年会 

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    Event date: 2014.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:富山大学   Country:Japan  

  86. 前期太古代の浅海域〜陸域(?)における熱水活動と生物多様性

    杉谷健一郎, 三村耕一, 山口能央, 竹内誠, 浅原良浩, 仙田量子, 鈴木勝彦

    2014年度 日本地球化学会第61回年会 

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    Event date: 2014.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:富山大学   Country:Japan  

  87. Magmatic evidence for the Arabian plate and Biston-Avoraman block (west Iran) collision during the late Cretaceous: Sr-Nd isotopes and U-Pb ages from the acidic rocks in the Harsin area

    Nouri, F., Azizi, H., Orihashi, Y., Asahara, Y., Yamamoto, K.

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    Event date: 2014.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  88. Sr、Nd同位体比とREE組成を用いた北極海チュクチ海域の沈降粒子中の珪酸塩の起源および季節変動の解析

    竹内晟也, 淺原良浩, 原田尚美, 長島佳菜, 小野寺丈尚太郎

    2014年度 日本地球化学会第61回年会 

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    Event date: 2014.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:富山大学   Country:Japan  

  89. 魚歯化石のネオジム同位体比を用いた日本海底層水の起源解析

    小坂由紀子, 堀川恵司, 淺原良浩, 張勁

    2014年度 日本地球化学会第61回年会 

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    Event date: 2014.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:富山大学   Country:Japan  

  90. アラビア湾南岸地域におけるアプチアン階石油根源岩の形成要因と海洋無酸素事変(OAE1a)との関連性

    山本和幸, 石橋正敏, 高柳栄子, 浅原良浩, 佐藤時幸, 西弘嗣, 井龍康文

    日本地質学会第121年学術大会 

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    Event date: 2014.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:鹿児島大学   Country:Japan  

  91. 福島県南西部只見川古期花崗岩類のU-PbおよびK-Ar年代

    若杉勇輝, 谷岡裕大, 壷井基裕, 淺原良浩

    日本地質学会第121年学術大会 

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    Event date: 2014.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:鹿児島大学   Country:Japan  

  92. Petrographic and geochemical studies of granitoids from the Inbi intrusives, Inner Zone of Southwest Japan

    SATO, Kei, KAMEI, Atsushi, MINAMI, Masayo, ASAHARA, Yoshihiro, KATO, Takenori

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    Event date: 2014.4 - 2014.5

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  93. 鉄を通して繋がるアムール川〜オホーツク海〜西部北太平洋亜寒帯域(WSP):Fe・Nd同位体を用いた検証

    安田友紀, 浅原良浩, 市川諒, 中塚武, 西岡純, 南秀樹, 長尾誠也, 谷水雅治, 申基澈, 河野麻希子

    第3回 同位体環境学シンポジウム 

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    Event date: 2013.12

    Language:Japanese   Presentation type:Poster presentation  

    Venue:総合地球環境学研究所 講演室   Country:Japan  

  94. Long-distance transport of particulate iron from the Amur River to the western subarctic Pacific reinforced by the combination of Fe and Nd isotopes International conference

    Tomoki Yasuda, Yoshihiro Asahara, Ryo Ichikawa, Takeshi Nakatsuka, Jun Nishioka, Hideki Minami, Seiya Nagao, Masaharu Tanimizu, Kicheol Shin, Makiko Kono

    AGU Fall Meeting 

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    Event date: 2013.12

    Language:English   Presentation type:Poster presentation  

    Country:United States  

  95. Cause of large negative Eu anomaly in the highly evolved A-type granites with REE tetrad pattern International conference

    Lee, S.G., Asahara, Y., Tanaka, T., Lee, M., Lee, S.R.

    AGU, Fall Meeting 2013 

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    Event date: 2013.12

    Language:English   Presentation type:Poster presentation  

    Country:United States  

  96. オホーツク海北西陸棚域から運び出されるアムール川起源の粒子態鉄〜Fe・Nd同位体による輸送過程の検証〜

    安田友紀, 浅原良浩, 市川諒, 中塚武, 西岡純, 南秀樹, 長尾誠也, 谷水雅治, 申基澈, 河野麻希子

    2013年度 日本地球化学会第60回年会 

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    Event date: 2013.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:筑波大学   Country:Japan  

  97. ケイ藻のデジタルアクションV 太平洋の高いeNdはケイ藻に由来する

    赤木右, 安田早希, 浅原良浩, 江本真理子, 高橋孝三

    2013年度 日本地球化学会第60回年会 

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    Event date: 2013.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:筑波大学   Country:Japan  

  98. Paleoenviromental cyclicity and water masses changes during MIS 31 at Shackleton site (IODP U1385) International conference

    F.J. Jimenez-Espejo, P. Grunert, B. Martrat, D. Hodell, F. Martinez-Ruiz, J.A. Flores, Y. Asahara, F.J. Rodriguez-Tovar, T. van de Flierdt, J.O. Grimalt, M.F. Sanchez-Goni, J. Hernandez-Molina, D.A.V. Stow, C. Alvarez-Zarikian, and IODP Expedition 339 Scientists

    11th International Conference Paleoceanography 

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    Event date: 2013.9

    Language:English   Presentation type:Poster presentation  

    Country:Spain  

  99. Nd isotopic composition of the granites with REE tetrad pattern International conference

    Seung-Gu, Lee, Yoshihiro Asahara, Tsuyoshi Tanaka, Nicolas Dauphas, Seung-Ryeol Lee

    European Geosciences Union General Assembly 2013 

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    Event date: 2013.4

    Language:English   Presentation type:Poster presentation  

    Country:Austria  

  100. 実構造物中のコンクリートの中性化進行評価ー14C, delta13C, delta18O, EPMA分析から何が言えるかー

    南雅代, 浅原良浩, 丸山一平, 吉田英一

    第25回(2012年度)名古屋大学年代測定総合研究センターシンポジウム 

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    Event date: 2013.1

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学 野依記念学術交流館   Country:Japan  

  101. ザグロス造山帯の火成作用と大陸地殻進化論

    浅原良浩

    シンポジウム「西アジアの地質とテクトニクス」 

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    Event date: 2012.12

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:筑波大学総合研究棟 A棟111号室   Country:Japan  

  102. アラブ首長国連邦アブダビ沖の前期アプチアン炭酸塩岩コア試 料に記録された海洋無酸素事変(OAE1a)時におけるグローバ ル炭素循環と古海洋環境変遷

    山本和幸, 石橋正敏, 高柳栄子, 浅原良浩, 佐藤時幸, 西弘嗣, 井龍康文

    日本地質学会第119年学術大会 

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    Event date: 2012.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  103. 北海道利尻島泥炭コアの14C年代と210Pb年代の差異

    河野麻希子, 南雅代, 谷水雅治, 浅原良浩, 細野高啓, 中村俊夫

    2012年度 日本地球化学会第59回年会 

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    Event date: 2012.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:九州大学   Country:Japan  

  104. 鉄・ネオジム同位体から探るオホーツク海における鉄の供給源と輸送過程

    安田友紀, 市川諒, 浅原良浩, 中塚武, 南秀樹, 長尾誠也, 西岡純, 谷水雅治, 申基澈, 河野麻希子

    2012年度 日本地球化学会第59回年会 

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    Event date: 2012.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:九州大学   Country:Japan  

  105. ザクロス山脈Sanandaj-Sirjan Zone北部のフェルシック深成岩のRb-Sr、Sm-Nd同位体分析

    清水美早, 浅原良浩, 壷井基裕, AZIZI, Hossein

    2012年度 日本地球化学会第59回年会 

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    Event date: 2012.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:九州大学   Country:Japan  

  106. 北海道泥炭コア試料中に記録された人為起源放出鉛の時系列供給源解析

    河野麻希子, 谷水雅治, 浅原良浩, 南雅代, 中村俊夫, 細野高啓

    第21回環境化学討論会 

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    Event date: 2012.7

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:愛媛県県民文化会館(ひめぎんホール)   Country:Japan  

  107. Old apparent 14C ages of a peat core from Rishiri Island, northern Japan International conference

    Kono, M., Minami, M., Tanimizu, M., Asahara, Y., Hosono, T., Nakamura, T.

    21st International Radiocarbon Conference 

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    Event date: 2012.7

    Language:English   Presentation type:Poster presentation  

    Country:France  

  108. Contribution of detrital materials from the Yukon River to the continental shelf sediments of the Bering Sea

    Japan Geoscience Union Meeting 2012 

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    Event date: 2012.5

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  109. 北海道利尻島に大気輸送された鉛の起源の変遷

    河野麻希子, 谷水雅治, 浅原良浩, 南雅代, 細野高啓, 中村俊夫

    平成23年度高知大学海洋コア総合研究センター共同利用・共同研究成果発表会 

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    Event date: 2012.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:高知大学 海洋コア総合研究センター   Country:Japan  

  110. 北海道利尻島泥炭湿地に飛来する鉛の供給源の変遷

    河野麻希子, 谷水雅治, 浅原良浩, 南雅代, 細野高啓, 中村俊夫

    第24回(2011年度)名古屋大学年代測定総合研究センターシンポジウム 

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    Event date: 2012.1

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学 野依記念学術交流館   Country:Japan  

  111. Ce isotope abundance in chondritic and HED meteorites International conference

    Seung-Gu, Lee, Yoshihiro Asahara, Tsuyoshi Tanaka, Seung-Ryeol Lee

    American Geophysical Union, Fall Meeting 2011 

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    Event date: 2011.12

    Language:English   Presentation type:Poster presentation  

    Country:United States  

  112. Geochemistry, Sr-Nd isotopes and Ar-Ar age for adakite rocks in the northern Sanandaj-Sirjan Zone, NW Iran

    Hossein Azizi, Yoshihiro Asahara, Motohiro Tsuboi

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    Event date: 2011.11

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  113. オホーツク海陸棚堆積物の鉄の同位体分析

    淺原良浩, 市川諒, 谷水雅治, 河野麻希子, 申基澈, 南秀樹, 中塚武

    第1回同位体環境学シンポジウム 

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    Event date: 2011.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:総合地球環境学研究所   Country:Japan  

  114. 放射性炭素14Cによるコンクリートの中性化時期の推定

    浅原良浩, 南雅代, 丸山一平, 吉田英一

    日本地球化学会第58回年会 

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    Event date: 2011.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:北海道大学札幌キャンパス   Country:Japan  

  115. Rb-Sr and Sm-Nd isotopic dating of gabbroic and granitic bodies in the Misho area, NW Iran

    M. Ahankoub, A. Jahangiri, Y. Asahara, M. Moead

    58th Annual Meeting of the Geochemistry Society of Japan 

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    Event date: 2011.9

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  116. 過去5000年間に北海道利尻島に飛来した鉛の供給源解析

    河野麻希子, 淺原良浩, 谷水雅治, 南雅代, 中村俊夫, 細野高啓

    日本地球化学会第58回年会 

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    Event date: 2011.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:北海道大学札幌キャンパス   Country:Japan  

  117. 北海道利尻島に飛来する鉛の供給量・供給源の変遷

    河野麻希子, 淺原良浩, 谷水雅治, 南雅代, 中村俊夫, 細野高啓

    高知大学海洋コア総合研究センター全国共同利用研究成果発表会 

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    Event date: 2011.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:高知大学 海洋コア総合研究センター   Country:Japan  

  118. 炭素・酸素同位体分析による実構造物中のコンクリートの中性化進行評価の試み

    浅原良浩, 南雅代, 丸山一平, 吉田英一

    第23回(2010年度)名古屋大学年代測定総合研究センターシンポジウム 

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    Event date: 2011.1

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学 野依記念学術交流館   Country:Japan  

  119. 放射性炭素を用いたコンクリート中性化の定量的解析の可能性

    南雅代、淺原良浩、吉田英一、丸山一平、武邊勝道

    2010年度日本質量分析学会同位体比部会 

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    Event date: 2010.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  120. 大阪府北部剣尾花崗岩体におけるストロンチウム放射起源および安定同位体の挙動

    壷井基裕、木村祐美子、若木重行、淺原良浩

    日本地質学会第117年学術大会 

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    Event date: 2010.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:富山大学   Country:Japan  

  121. Elemental migration in concrete during carbonation process

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    Event date: 2010.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  122. The age and Sr isotopic composition of Kamijima limestone (Toba city) belonging to Chichibu Belt, central Japan

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    Event date: 2010.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  123. La-Ce and Sm-Nd isotope geochemistry of Early Proterozoic Imweon leucogranite, Korea International conference

    Seung-Gu Lee, Yoshihiro Asahara, Nam Hoon Kim, Kun Han Kim, Tsuyoshi Tanaka, Akimasa Masuda, Yong Sun Song

    Goldschmidt Conference 2010 

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    Event date: 2010.6

    Language:English   Presentation type:Poster presentation  

    Country:United States  

  124. 放射性炭素を用いたコンクリートの中性化速度の推定

    浅原良浩, 南雅代, 丸山一平, 吉田英一, 田中剛

    第22回(2009年度)名古屋大学年代測定総合研究センターシンポジウム 

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    Event date: 2010.1

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:名古屋大学 野依記念学術交流館   Country:Japan  

  125. Rb-Sr age dating from the granitic bodies in the east of Sanandaj (NW-Iran)

    Hossein Azizi, Tsuyoshi Tanaka, Yoshihiro Asahara

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    Event date: 2009.12

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  126. 放射性炭素を用いたコンクリート構造物の健全度診断法の開発

    浅原良浩, 南雅代, 丸山一平, 吉田英一, 田中剛

    2009年度日本質量分析学会同位体比部会 

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    Event date: 2009.12

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:箱根高原ホテル(神奈川県足柄下郡箱根町元箱根)   Country:Japan  

    社会基盤を支えるコンクリート構造物は、その長期耐久性が期待されている一方、劣化が大きな問題ともなっている。コンクリートの主な劣化要因のうち、中性化はすべてのコンクリート構造物に関わる現象である。中性化は、コンクリートのセメント水和物と大気の二酸化炭素が反応することにより進行することから、コンクリート中の炭素の挙動は組織あるいは物理強度の変化を直接反映すると考えられる。本研究では、コンクリート中性化の進行時期の推定法として放射性炭素14Cの適用を試みた。

  127. 古代人の移動解明に向けての基礎データ -九州・四国地域の87Sr/86Sr同位体比地球化学図-

    城森由佳, 南雅代, 後藤晶子, 浅原良浩

    2009年度日本質量分析学会同位体比部会 

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    Event date: 2009.12

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  128. Intermediate Water formation in the Bering Sea during glacial periods: Evidence from neodymium isotope ratios International conference

    Keiji Horikawa, Yoshihiro Asahara, Koshi Yamamoto, Yusuke Okazaki

    American Geophysical Union, Fall Meeting 2009 

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    Event date: 2009.12

    Language:English   Presentation type:Oral presentation (general)  

    Country:United States  

  129. Radiocarbon as a tool of the study for carbonation process in concrete International conference

    3rd East Asia Symposium on Accelerator Mass Spectrometry 

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    Event date: 2009.10

    Language:English   Presentation type:Oral presentation (general)  

    Country:China  

  130. Application of radiogenic 14C to quantitative evaluation of concrete degradation

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    Event date: 2009.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  131. La-Ce and Sm-Nd isotopic systematics of Early Proterozoic leucogranite with tetrad effect

    Seung-Gu Lee, Yoshihiro Asahara, Nam Hoon Kim, Kun Han Kim, Tsuyoshi Tanaka, Akimasa Masuda, Yong Sun Song

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    Event date: 2009.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  132. 花崗岩中の断層・割れ目破砕形態と充填鉱物の関係およびその長期安定生評価への応用

    西本昌司, 吉田英一, 浅原良浩, 天野健治, 鶴田忠彦

    日本地球化学会第56回年会 

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    Event date: 2009.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:広島大学東広島キャンパス   Country:Japan  

  133. 愛知県東部~岐阜県南部の地球化学図と元素の分布要因についての考察

    田中剛, 山本鋼志, 南雅代, 三村耕一, 浅原良浩, 吉田英一, 竹内誠

    日本地球化学会第56回年会 

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    Event date: 2009.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:広島大学東広島キャンパス   Country:Japan  

  134. 中部地方領家帯神原トーナライトにおけるSr同位体初生値の不均質と同化作用

    壷井基裕、淺原良浩

    日本地質学会第116年学術大会 

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    Event date: 2009.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  135. Radiogenic and stable isotope systematics of strontium within a single granitic pluton International conference

    Goldschmidt Conference 2009 

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    Event date: 2009.6

    Language:English   Presentation type:Poster presentation  

  136. Huge difference of 87Sr/86Sr ratios between adjacent, same-aged seamount type limestones in Japan International conference

    Goldschmidt Conference 2009 

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    Event date: 2009.6

    Language:English   Presentation type:Poster presentation  

  137. Changes in water mass structures in the Bering Sea: Evidence from neodymium isotopes of Fe-Mn oxyhydroxides

    Japan Geoscience Union Meeting 2009 

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    Event date: 2009.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  138. 同一地点で採集された河川堆積物の採集年・季節の違いによる化学組成の変動

    南雅代、田中剛、山本鋼志、三村耕一、浅原良浩、吉田英一

    日本地球惑星科学連合2009年大会 

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    Event date: 2009.5

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  139. 地球化学図による愛知県東部~岐阜県南部の元素資源と地圏化学環境評価

    田中剛、山本鋼志、南雅代、三村耕一、浅原良浩、吉田英一

    日本地球惑星科学連合2009年大会 

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    Event date: 2009.5

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  140. ベーリング海堆積物中の陸源砕屑物のSr,Nd同位体組成:過去100年間のアラスカ・シベリアの環境変動の記録

    淺原良浩、竹内ふみ、長島佳菜、原田尚美、小栗一将、多田井修、山本鋼志

    ブルーアース'09 

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    Event date: 2009.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  141. 氷期ベーリング海中層水の形成:鉄マンガン水酸化物のNd同位体比から

    堀川恵司, 浅原良浩, 山本鋼志, 岡崎裕典, 高橋孝三

    東京大学海洋研究所共同利用研究集会 2008年度古海洋学シンポジウム 

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    Event date: 2009.1

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  142. 太平洋深海底堆積物中の鉄マンガン水酸化物のNd同位体比の時代変化

    後藤久範、浅原良浩、山本鋼志

    2008年度日本質量分析学会同位体比部会 

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    Event date: 2008.11

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  143. ベーリング海堆積物のSr、Nd同位体から過去100年間の北極圏の陸域環境変動を探る

    浅原良浩、竹内ふみ、長島佳菜、原田尚美、小栗一将、多田井修、山本鋼志

    2008年度日本質量分析学会同位体比部会 

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    Event date: 2008.11

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  144. Distributions of Lu and Hf in garnet: implications for Lu-Hf geochronology

    The 115th Annual Meeting ( 2008' Akita ) 

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    Event date: 2008.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  145. Sr、Nd同位体を用いた北極圏の陸域古環境復元の試み

    浅原良浩、竹内ふみ、長島佳菜、原田尚美、小栗一将、多田井修、山本鋼志

    日本地球化学会第55回年会 

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    Event date: 2008.9

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  146. ベーリング海陸棚堆積物の粒度・ESR分析に基づく過去80年間の環境変動復元

    長島佳菜、浅原良浩、竹内ふみ、原田尚美、小栗一将、多田井修、豊田新、Rella Stephan、多田隆治

    日本地球化学会第55回年会 

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    Event date: 2008.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  147. 北太平洋深海底堆積物中の鉄マンガン水酸化物のNd同位体比の時代変化と深層水循環の復元

    後藤久範、浅原良浩、山本鋼志

    日本地球化学会第55回年会 

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    Event date: 2008.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  148. 有孔虫炭酸塩殻中のNd同位体比と希土類元素組成

    堀川恵司、浅原良浩、山本鋼志

    日本地球化学会第55回年会 

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    Event date: 2008.9

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  149. 愛知県下、北部秩父帯中の隣接する同時代の石灰岩体から得られた大きく異なるSr同位体組成

    鈴木和博、山北聡、浅原良浩、三村耕一、田中剛

    日本地球化学会第55回年会 

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    Event date: 2008.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  150. 九州北部・中部地域のSr同位体比分布

    後藤(桜井)晶子、南雅代、浅原良浩

    日本地球化学会第55回年会 

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    Event date: 2008.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  151. Environmental reconstruction in the Bering Strait region using Sr and Nd isotopes in the continental shelf sediments

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    Event date: 2008.5

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  152. Sr、Nd同位体トレーサを利用したベーリング海およびチャクチ海表層堆積物中の陸源砕屑物の起源解析

    淺原良浩、竹内ふみ

    ブルーアース'08 第11回みらいシンポジウム 

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    Event date: 2008.3

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  153. ベーリング海周辺海域における陸源砕屑物の分布および起源の推定

    長島佳菜、竹内ふみ、淺原良浩、原田尚美、小栗一将、多田井修、豊田新、多田隆治

    ブルーアース'08 第11回みらいシンポジウム 

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    Event date: 2008.3

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  154. ベーリング海、チュクチ海表層堆積物のSr、Nd同位体比の地域分布と過去100年間の時系列変化

    浅原良浩、竹内ふみ、長島佳菜、原田尚美、小栗一将、多田井修

    2008年度日本海洋学会春季大会 

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    Event date: 2008.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  155. ベーリング海峡周辺海域の表層堆積物のSrおよびNd同位体組成

    竹内ふみ、浅原良浩、長島佳菜

    日本地球化学会第54回年会 

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    Event date: 2007.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  156. 太平洋深海底堆積物中の鉄マンガン水酸化物のNd同位体組成と深層水循環

    後藤久範、浅原良浩、柴田信之介、山本鋼志

    日本地球化学会第54回年会 

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    Event date: 2007.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  157. 竹(ハチク)の諸器官にみられる固体元素の存在度と安定同位体比の変化

    田中剛、若木重行、谷水雅治、浅原良浩

    日本地球化学会第54回年会 

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    Event date: 2007.9

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  158. Elemental and isotopic fractionation in some organs of bamboo International conference

    Tanaka, T., Wakaki, S., Tanimizu, M., Asahara, Y.

    Goldschmidt Conference 2007 

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    Event date: 2007.8

    Language:English   Presentation type:Poster presentation  

    Country:Germany  

  159. モンゴル中部ハンガイ‐ヘンテイ帯、ゴルヒ層の玄武岩化学組成について

    束田和弘, 栗原敏之, 浅原良浩, 丹羽耕輔, 常盤哲也, 丹羽正和, 大藤 茂, 柏木健司, 引地原野, 小塚隆文, Minjin Chuluun, Sersmaa Gonchigdorj, Dorjsuren Byambadash, Bunjinlkham Boiji

    日本地質学会第113年学術大会 

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    Event date: 2006.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:高知大学   Country:Japan  

  160. 南大洋堆積物中の海水起源成分と陸源砕屑物のSr、Nd同位体組成

    竹内ふみ、浅原良浩

    日本地球化学会第53回年会 

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    Event date: 2006.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  161. Sr、Nd同位体トレーサを用いた南インド洋堆積物中の陸源砕屑粒子の供給源解析

    淺原良浩、竹内ふみ

    ブルーアース'06 第9回みらいシンポジウム 

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    Event date: 2006.2

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  162. ハフニウムの分離抽出法および表面電離型質量分析計による同位体比分析法の検討

    渡辺慶太郎、浅原良浩

    2005年度日本質量分析学会同位体比部会 

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    Event date: 2005.11

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  163. 南大洋堆積物のSr、Nd同位体比を用いた古環境復元ー逐次溶解法を用いた陸源砕屑粒子の分離の検討ー

    竹内ふみ、浅原良浩

    2005年度日本質量分析学会同位体比部会 

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    Event date: 2005.11

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  164. Sr, Nd同位体による南大洋堆積物中の砕屑粒子の供給源解析

    浅原良浩, 竹内ふみ

    日本地球化学会第52回年会 

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    Event date: 2005.9

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  165. Radiometric ages and Nd-Sr isotopic compositions of granitic rocks from the Ulleungdo volcanic island, South Korea

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    Event date: 2005.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  166. 放射壊変起源同位体トレーサによる南半球の古環境復元

    淺原良浩、渡辺慶太郎

    ブルーアース'04 第8回みらいシンポジウム 

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    Event date: 2005.1

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  167. Application of Sr isotope to geochemical mapping and provenance analysis: the case of Aichi Prefecture, central Japan International conference

    32nd International Geological Congress 

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    Event date: 2004.8

    Language:English   Presentation type:Poster presentation  

  168. 北太平洋堆積物の放射壊変起源同位体:アジア大陸起源の風成塵供給量の変遷

    浅原良浩

    第52回質量分析総合討論会 

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    Event date: 2004.6

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  169. 地圏環境評価指標としてのSr同位体

    浅原良浩、石黒寛子、田中剛、山本鋼志、南雅代、三村耕一、吉田英一、與語節生

    日本地球化学会第50回年会 

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    Event date: 2003.9

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  170. New attempt to geochemical mapping of Sr isotope in Aichi Prefecture, central part of Japan International conference

    The 13th Annual V.M. Goldschmidt Conference 

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    Event date: 2003.9

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  171. 愛知県北東部のSr同位体比の分布とその規定要因

    石黒寛子、浅原良浩

    日本地球化学会第49回年会 

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    Event date: 2002.9

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  172. Hf-Nd isotopic variations of authigenic and silicate components in north Pacific sediments International conference

    The 12th Annual V.M. Goldschmidt Conference 

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    Event date: 2002.8

    Language:English   Presentation type:Oral presentation (general)  

  173. 北太平洋表層堆積物のHf-Nd同位体組成の分布

    浅原良浩、Der-Chuen Lee、Martin Frank、Tina van de Friert、Alex N. Halliday、西村昭

    日本地球化学会第48回年会 

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    Event date: 2001.10

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  174. Regional and temporal variations of 87Sr/86Sr and 143Nd/144Nd ratios in the north Pacific sediments and their significance on paleoclimatic variation in the Asian continent International conference

    The 10th Annual V.M. Goldschmidt Conference (Goldschmidt 2000) 

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    Event date: 2000.9

    Language:English   Presentation type:Poster presentation  

  175. Rb-Sr同位体系による美濃帯鵜沼地域黒色頁岩の放射年代及びその起源

    高間智宏、浅原良浩、田中剛

    日本地球化学会第47回年会 

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    Event date: 2000.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  176. 愛知県中央部における河川堆積物中のSr同位体比と元素の分布

    浅原良浩、田中剛、川邊岩夫、山本鋼志、平原靖大、三村耕一、劉永忠、 伊藤貴盛、三浦典子、太田充恒、高橋浩、谷水雅治、仙田量子、高木真理、加地拓哉、近藤正史、倉田有里子、柴田信之介、高間智宏、武邊勝道、田中万也、森康則、山下瑠佳、小笠原岳大、木村理恵、山下史哲、李池敏

    日本地球化学会第46回年会 

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    Event date: 1999.9

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  177. 北太平洋堆積物のSr同位体比の地域分布と時代変化

    日本地球化学会第45回年会 

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    Event date: 1998.10

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  178. Paleoclimatic information of Sr isotopic variation in detrital sediment from the north Pacific Ocean International conference

    The 9th International Conference on Geochronology, Cosmochronology and Isotope Geology (ICOG-9) 

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    Event date: 1998.8

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  179. 深海底堆積物の精密なSr同位体比分析による古環境解析

    浅原良浩、田中剛、西村昭

    日本地球化学会第44回年会 

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    Event date: 1997.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  180. Provenance analysis of marine sediment by apparent isochron of Rb-Sr system

    1996 Annual Meeting of the Geochemical Society of Japan 

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    Event date: 1996.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  181. Cyclical variations of 87Sr/86Sr ratio in the north central Pacific sediment during the Quaternary

    Todai International Symposium on Cosmochronology and Isotope Geoscience 

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    Event date: 1996.1

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  182. Cyclical Variations of Sr Isotope Composition in Core Samples of the North Central Pacific Sediments

    1995 Annual Meeting of the Geochemical Society of Japan 

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    Event date: 1995.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  183. Variation of Sr Isotope Composition in Core Samples of North Central Pacific Sediments

    1994 Annual Meeting of the Geochemical Society of Japan 

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    Event date: 1994.10

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  184. Sr isotopes as an indicator of geologic provenance for deep-sea sediments from the western Pacific Ocean

    1993 Annual Meeting of the Geochemical Society of Japan 

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    Event date: 1993.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  185. Lateral variation of strontium isotopes in deep-sea sediments from the West-Pacific Ocean

    1993 Japan Earth and Planetary Science Joint Meeting 

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    Event date: 1993.3

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

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Research Project for Joint Research, Competitive Funding, etc. 6

  1. イラク北東部ザクロス造山帯に産する中生代・新生代火成岩の年代学的・地球化学的・岩石学的研究

    2019.6 - 2019.9

    大幸財団 2019年度第28回外国人来日研究助成 

    淺原 良浩

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    Grant type:Competitive

  2. U-Pb 年代測定のための新たな“若い”ジルコン標準試料の化学的均質性の評価

    2019.4 - 2020.3

    宇宙地球環境研究所 2019年度国際共同研究 

    淺原良浩

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    Grant type:Competitive

  3. U-Pb 年代測定のための新たな“若い”ジルコン標準試料の評価に関する予察的研究

    2018.4 - 2019.3

    宇宙地球環境研究所 平成30年度国際共同研究 

    淺原良浩

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    Grant type:Competitive

  4. イラン国内に分布するキルナ型磁鉄鉱–燐灰石(IOA)鉱床の年代測定と成因解析

    2017.4 - 2018.3

    宇宙地球環境研究所 平成29年度国際共同研究 

    淺原良浩

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    Grant type:Competitive

  5. イラン北西部ザクロス・アルボルス山脈に産する火成岩の岩石学的・地球化学的・年代学的研究

    2012.6 - 2012.9

    大幸財団 平成24年度第21回外国人来日研究助成 

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    Grant type:Competitive

  6. 放射性炭素14Cを指標とする名古屋大学校舎のコンクリートを用いた定量的劣化度評価の試み

    2008.7 - 2009.3

    名古屋大学総長裁量経費 

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    Grant type:Competitive

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KAKENHI (Grants-in-Aid for Scientific Research) 10

  1. 大陸縫合帯イランの鉱床成因解析−新しい同位体地化学探査技術の実用化− International coauthorship

    Grant number:17H01671  2017.4 - 2021.3

    科学研究費補助金  基盤研究(A)

    淺原良浩, 壷井基裕, 南雅代, 堀江憲路, 山本鋼志

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\37310000 ( Direct Cost: \28700000 、 Indirect Cost:\8610000 )

    本調査研究の目的は、Rb-Sr系、Sm-Nd系などの天然の放射壊変系同位体の分析を、熱水鉱床、堆積鉱床などの多様な鉱床に適用し、得られた同位体初生値と年代値に基づいて鉱床成因解析を行うことである。具体的には、大陸縫合帯であるイラン国内における火成活動と鉱床生成の関連性を明らかにするため、ザグロス山脈北西部およびアルボルズ山脈西部を対象に現地調査を行い、鉱石、鉱床母岩、貫入火成岩などの化学分析・同位体分析を実施し、新しい同位体地化学探査の実用化を目指している。3年目は、2019年4~5月(11日間)および10月(10日間)に現地調査を行った。調査地域は、ザグロス造山帯北西部の白亜紀花崗岩体(ゴルベ地域、ウルミエ湖周辺)と第三紀・第四紀の火山岩類(タカブ地域、サハンド地域)である。4月の調査は、代表者、分担者1名、協力者6名(日本側の大学院生1名、イラン側の研究者2名と大学院生3名)の計8名で、10月の調査は、代表者、 分担者1名、協力者4名(日本側の大学院生1名、イラン側の研究者3名)の計6名で実施した。採取した花崗岩、閃緑岩、安山岩の試料について薄片観察を行った後、名古屋大学で化学分析とRb-Sr、Sm-Nd系の同位体分析、LA-ICP-MSによるジルコン年代測定を行った。タカブ地域の火山岩類のSr-Nd同位体初生値、微量元素組成とジルコン年代について詳細に解析を行った結果、プレート衝突に伴う第三紀のマグマ活動が複数のステージに分類されることが明らかとなった。このマグマ活動(マグマ源)の違いはザグロス造山帯北西部の鉱床成因解析の重要な手掛かりとなるものであり、本調査研究3年目の重要な成果である。本研究成果に関する論文は執筆中であり、2020年夏頃までに国際誌に投稿する予定である。
    交付申請書に記載した2019年度(3年目)当初に予定していた研究実施計画の内容は十分達成している。予定していた春と秋の2回の現地調査、採取した試料の化学分析および同位体分析は当初予定どおり完了し、2018年度および2019年度の分析結果に基づく論文執筆は順調に進み、年度当初に予定していなかった研究も含めて、2019年度の研究は当初計画以上に進展している。その具体的な内容は次のとおりである。
    (1)イラン北西部における希土類元素(レアアース)の資源ポテンシャルに関する評価を実施した。これは、年度当初には予定していなかった研究である。本調査研究(H29~R02)およびH25~H28の基盤研究(B)で積み上げてきたイラン北西部に広がる花崗岩の希土類元素濃度データをコンパイルし、希土類元素の高濃度分布地域と火成活動、テクトニクスとの関係を明らかにするとともに、資源ポテンシャルの高い地域の抽出を試みた。これらの成果に関する論文は、受理されており、2020年度中に公表される予定である。
    (2)2019年度に公表された論文以外にも、印刷中(in press)の論文は7編、投稿中の論文は3編あり、順調に成果公表が進んでいる。
    2019年度の研究実施計画は、以上のとおり当初の計画以上に進展しており、最終年度(2020年度)で当初の研究目的を十分に達成できる見通しがある。
    2020年度(最終年度)の現地調査は10月に実施する予定であり、準備を進めている。研究代表者、分担者がイランでの現地調査を実施できない場合は、現地の研究協力者と連携して、現地協力者が現地調査、試料採取を進める。昨年度までに調査を実施した西アゼルバイジャン州のウルミエ湖周辺からクルジスタン州西部の再調査および追加試料採取を主に実施する。この追調査は、これまでの分析結果から当初予想していなかった新たな知見が得られる可能性が出てきたため、その可能性を確認することが目的である。また、これまで鉱床母岩としての火成岩の成因解析だけでなく、マグマ活動に関わる深部流体の解析も行うため、昨年度までに採取した火山周辺の地下水試料(温泉水)の化学分析、同位体分析にも新たに取り組む。
    10月には、イランの研究協力者との共同現地調査だけでなく研究総括を含めた研究打合せを予定しているが、実施できない場合に備えて、すでにメール等で緊密に連絡を取り合い、最終年度の研究が滞りなく推進できる体制を整えている。成果公表については当初予定以上に進んでおり、2020年度も3~4編の論文を投稿する予定である。

  2. 鉄とネオジム同位体を指標とした海洋生態系物質循環の解明

    Grant number:17H01857  2017.4 - 2020.3

    科学研究費補助金  基盤研究(B)

    淺原良浩, 長島佳菜, 藤木徹一

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\16120000 ( Direct Cost: \1240000 、 Indirect Cost:\3720000 )

    鉄は海洋の生態系をコントロールする重要な要因の1つであるが、海洋一次生産者である植物プランクトンが摂取している鉄の起源や化学形態に関する知見は少なく、そのため大陸などからの鉄の供給と生物生産の関係を定量的に評価することが困難である。本研究では、鉄(Fe)の安定同位体とネオジム(Nd)の放射壊変起源同位体を併用し、植物プランクトンが摂取する鉄の起源・形態を特定することが第一の目的である。さらに、この結果に基づき、北太平洋亜寒帯域や北極海に供給される鉄の起源・量の年変化・季節変化を同位体データおよび化学データから推定し、生物生産量・生物群集の変化のデータと対比しながら、これらの海域の生物生産と陸域からの鉄供給との関係を定量的に評価することが第二の目的である。
    沈降粒子中の鉄の起源を特定する指標としてのFe同位体とNd同位体の有用性の検証を進めるため、初年度(平成29年度)は分析技術の確立に重点を置き研究を進めた。具体的には、(i)逐次溶解法による沈降粒子試料からの各種構成成分の分離・抽出条件の最適化と、(ii)極微量ネオジムの同位体比測定法の確立を行った。2年目(平成30年度)は、これらの分析法を実試料に適用した。具体的には、北太平洋亜寒帯域の沈降粒子に逐次溶解法を適用し、各成分の主成分、微量成分の定量分析、Sr、Ndの同位体分析を進めた。その結果、沈降過程での珪酸塩砕屑粒子の組成変化を新たに確認する、などの成果が得られた。一方、逐次溶解法による分離・抽出条件に一部問題点も確認された。3年目(令和元年度)は、この分析上の問題点を解決した上で、沈降粒子の年変化・季節変化に本格的に取り組んだ。その結果、同位体組成および化学組成の季節変化を見出すとともに、その変動の主要因を特定することに成功した。これは、北太平洋亜寒帯域への供給物質の定量的評価の手掛かりとなる重要な成果である。
    平成30年度(2年目)終了時には進捗状況は「やや遅れている」状態であったが、令和元年度(3年目)当初の交付申請書に記載した研究実施計画はおおむね順調に進展している。3年目は、2年目に残されていた分析手法の問題点を解決した上で、北太平洋亜寒帯域の沈降粒子の年変化・季節変化の解析に取り組み、3年目の研究実施計画は順調に実施できた。具体的には、分析上の問題点を解決するため逐次溶解の条件設定を一部見直し、さらに、想定外に少なかった珪酸塩砕屑物成分の分析法の見直すことで、手法の改良を3年目の前半までに完了した。その後、沈降粒子(実試料)の年変化・季節変化の本格的な分析を再開し、年度末の3月までに、年変化 ・季節変化のデータの取得は順調に進んだ。その結果、季節変化を見出すとともに、その変動の主要因の特定に成功した。
    以上の通り、令和元年度の研究実施計画はおおむね順調に進んでおり、最終年度(令和2年度)で当初の研究目的を十分に達成できる見通しがある。
    最終年度(4年目)は、詳細な季節変化のデータを取得するため、引き続き北太平洋亜寒帯域の沈降粒子の分析を行う。ネオジム(Nd)および鉄(Fe)の同位体比測定は、代表者の研究室の表面電離磁場型質量分析計(TIMS)、韓国資源地質研究院(KIGAM)の多重検出器型ICP-MS(MC-ICP-MS)をそれぞれ用いて行う。MC-ICP-MSについては、名古屋大学とKIGAMとの同位体地球化学の研究プロジェクトの一環で利用する計画である。8月頃に代表者と分担者、研究協力者の4名が集まり、沈降粒子の年変化・季節変化の分析データを吟味し、データの取りまとめを進める。追加分析の結果に基づき、8月頃までには、化学組成、同位体組成、鉱物組成の1年間の時系列変化を対比し、起源物質の特定とその季節変化を明らかにする。Fe、Sr、Nd同位体組成から、アジア大陸からの風成塵、千島列島からの火山灰、オホーツク海からの流入物など、この海域への供給物質の季節変動を確認できる見込みである。
    これまでに得られた研究成果を国内会議等で発表するとともに、国際誌に論文を投稿する。

  3. 放射壊変系同位体を用いたイラン・ザグロス造山帯の希少金属鉱床の成因解析 International coauthorship

    Grant number:25303029  2013.4 - 2017.3

    科学研究費補助金  基盤研究(B)

    淺原良浩, 壷井基裕

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\16770000 ( Direct Cost: \12900000 、 Indirect Cost:\3870000 )

  4. Study on a huge collapse of the Antarctic Ice Sheet during past warmer periods: New insights from Pb isotope analysis

    Grant number:21H04924  2021.4 - 2025.3

    Grant-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

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    Authorship:Coinvestigator(s)  Grant type:Competitive

  5. Water and soil environmental changes and dawn of urban mine around the early cities in Ancient West Asia International coauthorship

    Grant number:18H05447  2018.6 - 2023.3

    Grant-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

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    Authorship:Coinvestigator(s)  Grant type:Competitive

  6. Fundamental study on reliable radiocarbon dating and diet reconstruction of cremated bones, and its extending to archeological field

    Grant number:18H00756  2018.4 - 2021.3

    Grant-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research(B)

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    Grant amount:\16900000 ( Direct Cost: \13000000 、 Indirect Cost:\3900000 )

  7. 重元素安定同位体分別メカニズムの解明と花崗岩成因解析への応用

    Grant number:24540527  2012.4 - 2015.3

    科学研究費補助金  基盤研究(C)

    壷井基裕, 淺原良浩

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    Grant amount:\5200000 ( Direct Cost: \4000000 、 Indirect Cost:\1200000 )

  8. 有機態金属元素の同位体に着目した新しい環境変動解析手法の開発

    Grant number:23510005  2011.4 - 2014.3

    科学研究費補助金  基盤研究(C)

    淺原良浩, 谷水雅治

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\5460000 ( Direct Cost: \4200000 、 Indirect Cost:\1260000 )

  9. 微量金属元素同位体を用いた北極圏の陸域および縁海の環境変動解析の試み

    Grant number:20510008  2008.4 - 2011.3

    科学研究費補助金  基盤研究(C)

    淺原良浩

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\4550000 ( Direct Cost: \3500000 、 Indirect Cost:\1050000 )

  10. 微量金属元素同位体を用いた河川および沿岸海洋の環境動態解析の試み

    Grant number:15710009  2003.4 - 2006.3

    科学研究費補助金  若手研究(B)

    淺原良浩

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\3200000 ( Direct Cost: \3200000 )

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Teaching Experience (On-campus) 10

  1. Geochemical Analysis I and Experiments

    2021

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    This course aims that students will understand principles and methods of basic geochemical analysis and will develop their thinking skill and judgement through discussing data obtained by the methods and writing experimental reports. At the end of this course, students are expected to acquire basic skills required for chemical analysis of cosmic material (meteorite) and environmental material as well as terrestrial material (rock, sediment).

  2. Geochemistry and Cosmochemistry

    2021

  3. フィールドセミナーI

    2021

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    【地球化学講座教員の担当項目】名古屋市内を流れる山崎川の水質調査を行う。4つのグループに分かれ、源流から河口域まで水試料を採取し、現場でpH、DO、CODなどの簡易測定を行う。その後、大学に持ち帰った水試料を、イオンクロマトグラフィーで溶存イオンの定量分析を行う。これらの結果を総合的に解析し、レポートとしてまとめる。

  4. Fundamentals of Earth Science I

    2020

  5. Geochemical Analysis II and Experiments

    2020

  6. Seminar on Geochemistry and Cosmochemistry 2A, 2B, 2C, 2D

    2020

  7. Seminar on Geochemistry and Cosmochemistry 1A, 1B, 1C, 1D

    2020

  8. Analytical Method of Environmental Samples 1

    2020

  9. Earth and Planetary Science Seminar I

    2020

  10. Analytical Method of Environmental Samples 2

    2020

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Teaching Experience (Off-campus) 3

  1. Special Lecture in Applied Chemistry for Environment IV

    2020.4 - 2020.9 Kwansei Gakuin University)

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    Level:Postgraduate 

  2. 地球環境変遷学

    2014.4 - 2015.3 Kobe University)

  3. 化学特殊講義XIX

    2013.4 - 2014.3 Kwansei Gakuin University)

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    Level:Postgraduate 

 

Social Contribution 1

  1. 「深海底の泥に記録された地球の歴史」

    Role(s):Lecturer

    豊橋市自然史博物館  名古屋大学出前授業  2020.11

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    Audience: Schoolchildren, Junior students, High school students, College students, Graduate students, Guardians, General

    Type:Visiting lecture

Media Coverage 1

  1. 「日本海 450万年前に原型 – 独自の生物 起源解明へ」 Newspaper, magazine

    読売新聞社  読売新聞 愛知県版  2019.2

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    Author:Other