Updated on 2021/10/19

写真a

 
HIDAKA Hiroshi
 
Organization
Graduate School of Environmental Studies Department of Earth and Environmental Sciences Geochemistry and Cosmochemistry Professor
Graduate School
Graduate School of Environmental Studies
Undergraduate School
School of Science Department of Earth and Planetary Science
Title
Professor
Contact information
メールアドレス
External link

Degree 1

  1. Doctor (Science) ( 1992.2   The University of Tokyo ) 

Research Interests 15

  1. 天然原子炉

  2. 核分裂

  3. rare earth elements

  4. meteorite

  5. mass spectromtery

  6. isotope

  7. meteorite

  8. extinct nuclide

  9. spallation

  10. lunar regolth

  11. rare earth elements

  12. cosmic rays

  13. cosmochemistry

  14. isotope

  15. neutron capture

Research Areas 4

  1. Natural Science / Space and planetary sciences  / Cosmochemistry

  2. Nanotechnology/Materials / Analytical chemistry  / mass spectrometry

  3. Natural Science / Experimental studies related to particle-, nuclear-, cosmic ray and astro-physics  / cosmic rays

  4. Natural Science / Solid earth sciences  / chronology

Current Research Project and SDGs 5

  1. 同位体分析手法の開発

  2. evolution of planetary materials in the solar system

  3. Determination of the abundance of Cs-135 in the early solar system and its application for cosmochronology

  4. Progress on REE isotopic studies for cosmochemistry

  5. interaction of cosmic rays with planetary materials

Research History 7

  1. Nagoya University   School of Environmental Studies   Professor

    2016.3

  2. Hiroshima University   Graduate School of Science   Professor

    2002.1 - 2016.2

  3. Hiroshima University   Faculty of Science   Associate professor

    1995.12 - 2001.12

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    Country:Japan

  4. Tokyo Metropolitan University   Faculty of Science   Assistant

    1992.4 - 1995.11

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    Country:Japan

  5. The University of Tokyo   Faculty of Science   Assistant

    1989.12 - 1992.3

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    Country:Japan

  6. Kumamoto University   Faculty of Engineering   Assistant

    1988.4 - 1989.11

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    Country:Japan

  7. 株式会社東芝   総合研究所   研究員

    1986.4 - 1988.3

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    Country:Japan

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Education 2

  1. The University of Tokyo   Graduate School, Division of Science   Department of Chemistry

    1984.4 - 1986.3

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    Country: Japan

  2. The University of Tokyo   Faculty of Science   Department of Chemistry

    1980.4 - 1984.3

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    Country: Japan

Professional Memberships 10

  1. Geochemical Society of Japan

    2012.1 - 2015.12

  2. Geochemical Society of Japan

    2006.1 - 2009.12

  3. The Geochemical Society

    2005.10

  4. 日本放射化学会

    1999.10

  5. 日本質量分析学会

    1996.4

  6. Meteoritical Society

    1995.1

  7. Geochemical Society of Japan

    1988.4

  8. 日本化学会

    1988.4 - 2016.12

  9. 日本分析化学会

    1988.4 - 2016.12

  10. 日本イオン交換学会

    1988.4 - 1992.12

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Committee Memberships 15

  1. The Meteoritical Society   The Leonard Medal Committee chair  

    2021.1 - 2021.12   

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    Committee type:Academic society

  2. 日本地球化学会   理事  

    2019.10   

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    Committee type:Academic society

  3. 日本原子力研究開発機構   博士研究員研究業績評価委員会委員  

    2019.9   

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    Committee type:Other

  4. 国立極地研究所   二次イオン質量分析研究委員会 委員長  

    2018.4   

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    Committee type:Other

    国立極地研究所の全国共同利用施設の委員

  5. 国立極地研究所   南極隕石研究委員会委員  

    2018.1   

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    Committee type:Other

    国立極地研究所に保管されている南極隕石試料の研究使用のための運営に携わる

  6. The Meteoritical Society   The Leonard Medal Committee member  

    2018.1   

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    Committee type:Academic society

  7. 日本地球化学会   年会実行委員  

    2016   

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    Committee type:Academic society

  8. Scientific Reports   Editorial Board Member  

    2014.1   

  9. 日本化学会   学術賞・進歩賞選考委員会委員  

    2013 - 2014   

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    Committee type:Academic society

  10. 日本地球化学会   年会実行委員  

    2009   

  11. 日本地球化学会   英文誌Geochemical Journal編集委員  

    2004.1 - 2007.12   

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    Committee type:Academic society

  12. 日本地球化学会   和文誌地球化学編集委員  

    2000.1 - 2006.12   

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    Committee type:Academic society

  13. 国際純正応用化学連合   原子量委員会委員  

    1997.9 - 2007.9   

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    Committee type:Academic society

  14. 日本質量分析学会   年会実行委員  

    1995   

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    Committee type:Academic society

    日本質量分析学会

  15. 日本イオン交換学会   年会実行委員  

    1989   

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    Committee type:Academic society

    日本イオン交換学会

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Awards 3

  1. The Geochemical Society of Japan Award

    2018.9   Geochemical Society of Japan  

    HIDAKA Hiroshi

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    Award type:International academic award (Japan or overseas)  Country:Japan

  2. 学会賞

    2008.9   日本放射化学会  

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    Award type:International academic award (Japan or overseas)  Country:Japan

  3. 奨励賞

    1993.9   日本地球化学会  

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    Award type:International academic award (Japan or overseas)  Country:Japan

 

Papers 110

  1. Space weathering of iron sulfides in the lunar surface environment Reviewed International coauthorship

    T. Matsumoto, T. Noguchi, Y. Tobimatsu, D. Harries, F. Langenhorst, A. Miyake, and H. Hidaka

    Geochimica et Cosmochimica Acta   Vol. 299   page: 69 - 84   2021.2

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.gca.2021.02.013

  2. Estimation of Thermal and Epithermal Neutron Fluences at the Lunar Surface from Isotopic Compositions of Rare Earth Elements Reviewed

    Hiroshi Hidaka, Yuki Mizutani, Shigekazu Yoneda

    The Astrophysical Journal   Vol. 904 ( 2 ) page: 183 - 183   2020.12

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    Authorship:Lead author, Last author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:American Astronomical Society  

    DOI: 10.3847/1538-4357/abbffe

    Web of Science

    Other Link: https://iopscience.iop.org/article/10.3847/1538-4357/abbffe

  3. A Review of In Situ Isotopic Studies of the Oklo and Bangombé Natural Fission Reactors Using Microbeam Analytical Techniques Invited Reviewed

    Hiroshi Hidaka

    Minerals   Vol. 10 ( 12 ) page: 1060 - 1060   2020.11

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

    Isotopic analyses of elements in the natural reactor materials have often been performed to understand the distribution behaviors of the fission products and to evaluate the function of nuclear reactions since the first discovery of a natural reactor in 1972. Several types of unique microminerals, including significant amounts of fission products, have been found in and around the Oklo and the Bangombé natural reactors. In the past two decades, microbeam techniques using ion and laser probe facilities have been effectively applied for the in situ isotopic analyses of individual microminerals to investigate the migration behaviors of fissiogenic radioisotopes produced in the reactors. This paper presents a review of interpretations of the isotopic results of microminerals found in and around the natural reactors.

    DOI: 10.3390/min10121060

    Web of Science

  4. Diversity and origin of strontium and barium isotopic anomalies in CM chondrites Reviewed

    Keisuke Sakuma, Hiroshi Hidaka, Shigekazu Yoneda

    Geochemical Journal   Vol. 54 ( 6 ) page: 393 - 410   2020.11

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  5. Chemical separation and determination of the isotopic compositions of dysprosium, erbium and ytterbium in geochemical materials by thermal ionization mass spectrometry Reviewed

    Yuki Mizutani, Hiroshi Hidaka, Shigekazu Yoneda

    Geochemical Journal   Vol. 54 ( 6 ) page: 381 - 391   2020.11

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  6. Development of U-Pb dating of uraninite using a secondary ion mass spectrometer: Selection of reference material and establishment of calibration method Reviewed

    Horie Kenji, Hidaka Hiroshi

    ISLAND ARC   Vol. 28 ( 5 )   2019.9

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

    DOI: 10.1111/iar.12319

    Web of Science

  7. The Archean Victoria Fjord terrane of northern most Greenland and geodynamic interpretation of Precambrian crust in and surrounding the Arctic Ocean. Reviewed International coauthorship

    A. Nutman, V. Bennett, H. Hidaka, N. Henriksen, S. Ali

    Journal of Geodynamics   Vol. 129   page: 3 - 23   2019.9

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

  8. Cosmochemical and geochemical studies on the isotopic variations of elements induced by nuclear reactions in nature Invited Reviewed

      Vol. 53   page: 1 - 14   2019.6

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    Authorship:Lead author, Last author, Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)  

  9. 176Lu-176Hf and 87Rb-87Sr Systematics and Rare Earth Element Abundances of Nine Diogenite Meteorites: Evidence for Their Crystallization from Partial Melts of the Vestan Mantle. Reviewed

    Takaharu Saitoh, Hiroshi Hidaka, Seung-Gu Lee

    The Astrophysical Journal   Vol. 877 ( 73 ) page: 1 - 10   2019.4

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

  10. Zircon U-Pb (SHRIMP) ages of the Jahazpur granite and Mangalwar gneiss from the Deoli-Jahazpur sector, Rajasthan, NW India: A preliminary reappraisal of stratigraphic correlation and implications to crustal growth Invited Reviewed

    Dey, B, Das, K, Dasgupta, N, Bose, S, Hidaka, H, Ghatak, H

    “Geological Evolution of the Precambrian Indian Shield” SES Series by Springer,     page: 39 - 56   2019

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

    DOI: 10.1007/978-3-319-89698-4_3

  11. The Spongtang Massif in Ladakh, NW Himalaya: An Early Cretaceous record of spontaneous, intra-oceanic subduction initiation in the Neotethys Reviewed International coauthorship

    Buckman Solomon, Aitchison Jonathan C., Nutman Allen P., Bennett Vickie C., Saktura Wanchese M., Walsh Jessica M. J., Kachovich Sarah, Hidaka Hiroshi

    GONDWANA RESEARCH   Vol. 63   page: 226-249   2018.11

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.gr.2018.07.003

    Web of Science

  12. U-Pb zircon and U-Th-total Pb monazite ages from the Phulbani domain of the Eastern Ghats Belt, India: Time constraints on high-grade metamorphism and magmatism in the lower crust Reviewed

    Ganguly Proloy, Das Kaushik, Bose Sankar, Ghosh Gautam, Hayasaka Yasutaka, Hidaka Hiroshi

    PRECAMBRIAN RESEARCH   Vol. 316   page: 1 - 23   2018.10

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

    DOI: 10.1016/j.precamres.2018.07.024

    Web of Science

  13. Timing and duration of regional metamorphism in the Kagasawa and Unazuki areas, Hida metamorphic complex, southwest Japan Invited Reviewed

    Kenji Horie, Yukiyasu Tsutsumi, Mami Takehara, Hiroshi Hidaka

    Chemical Geology   Vol. 484   page: 148 - 167   2018.5

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

    U–Pb zircon geochronology of two granite intrusions containing bluish‑tint K-feldspars and two biotite-hornblende gneisses in the Kagasawa area, situated at the center part of the Hida metamorphic complex, southwest Japan, reveals the early Triassic low P/T metamorphism in the Hida metamorphic complex (251–247 Ma). The granite intrusions into the Hida gneiss occurred at two different stages (235.4 ± 1.6 Ma and 183.6 ± 1.8 Ma) and thermally affected the Hida gneiss. In the Unazuki area, situated at the northeast margin of the Hida metamorphic complex, a quartzo-feldspathic schist and a biotite granite containing a quartzo-feldspathic schist as xenolith yielded U–Pb zircon ages of 258.0 ± 2.3 Ma and 253.0 ± 1.9 Ma, respectively, which indicates that the medium P/T metamorphism in the Unazuki area occurred in late Permian. The similarity between the geochemical compositions in whole rocks and zircons of the quartzo-feldspathic schist and the granite suggests that felsic volcanics were deposited on basement rocks at 258 Ma and, after affecting the medium P/T metamorphism, residual felsic magma was exhumed while taking the Unazuki schists as a xenolith at 253 Ma. Although the time interval between protolith formation and post-peak regional metamorphism in the Unazuki area (0.8–9.2 Ma) is similar to that in the Kagasawa area (1–8.6 Ma), the different timing of the regional metamorphism indicates that the protolith of the Unazuki metasediments was deposited not on the proximal Hida metamorphic complex but on ancient rocks containing Eoarchean-Paleoproterozoic components of the North China Craton.

    DOI: 10.1016/j.chemgeo.2017.12.016

    Web of Science

    Scopus

  14. The discovery of silicon oxide nanoparticles in space-weathered of Apollo 15 lunar soil grains Reviewed

    Lixin Gu, Bin Zhang, Sen Hu, Takaaki Noguchi, Hiroshi Hidaka, Yangting Lin

    Icarus   Vol. 303   page: 47 - 52   2018.3

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Academic Press Inc.  

    Space weathering is an important process on the Moon and other airless celestial bodies. The most common space weathering effects are amorphization of the top surface of soil grains and formation of nanophase iron particles (npFe) within the partially amorphous rims. Hence, space weathering significantly affects optical properties of the surface of the Moon and other airless celestial bodies. Transmission electron microscope (TEM) analysis of Apollo 15 soil grains displays npFe (≤5 nm in size) embedded in the space-weathered rim (∼60 nm in thickness) of a pyroxene grain, consistent with previous studies. In contrast, submicron-sized fragments that adhere to the pyroxene grain show distinct space weathering features. Silicon oxide nanoparticles (npSiOx) were observed with npFe in a submicron-sized Mg–Fe silicate fragment. This is the first discovery of npSiOx as a product of space weathering. The npSiOx and the coexisting npFe are ∼10–25 nm in size, significantly larger than the typical npFe in the space weathered rim of the pyroxene grain. The coexisting npSiOx and npFe were probably formed directly in micrometeorite shock-induced melt, instead of in a solar-wind generated vapor deposit or irradiated rim. This new observation will shed light on space weathering processes on the Moon and airless celestial bodies.

    DOI: 10.1016/j.icarus.2017.12.028

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    Scopus

  15. Zircon U-Pb geochronology and geochemistry of the Cerro Colorado porphyry copper deposit, northern Chile Reviewed

    Debbie P. W. Tsang, Simon R. Wallis, Koshi Yamamoto, Makoto Takeuchi, Hiroshi Hidaka, Kenji Horie, Brian C. Tattitch

    ORE GEOLOGY REVIEWS   Vol. 93   page: 114 - 140   2018.2

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER SCIENCE BV  

    Porphyry Copper Deposits (PCDs) dominantly form in convergent plate margins genetically related to volcanic arcs. However, their temporal relationships with active volcanism are less clear. Active volcanic activity is often considered to impede the formation of PCDs and some workers have concluded that PCD formation must take place at times of volcanic quiescence or at a waning stage of volcanism. However, several studies have documented evidence suggesting syn-eruption PCD formation. A combination of radiometric dating, geochemistry studies and observations of rock cores from the Cerro Colorado PCD, a BHP Billiton property located in N. Chile, provides evidence compatible with syn-volcanic PCD formation within a volcanic edifice.Textural observations at both hand specimen and microscopic scales combined with new LA-ICPMS and SHRIMP dating of zircons suggest the intrusive history of the Cerro Colorado area can be separated into two main units: a porphyritic tonalite ca. 53.5 Ma and a porphyritic quartz monzonite ca. 50 Ma. There is also evidence for crystallisation at ca. 60 Ma, but a corresponding distinct lithology was not identified. A quartz porphyry unit previously identified as the youngest intrusive body is reinterpreted as an altered equivalent of the monzonite. The youngest intrusive units are represented by porphyritic granodiorite with an age 51-50 Ma. These units only show minor metal mineralisation suggesting that the main phase of mineralisation in the Cerro Colorado mine occurred over a few million years, bracketed by the two main pulses of igneous intrusion, which are consistent with documented Ar-Ar ages. Re-Os ages reported by previous studies suggest an earlier phase of mineralisation at ca. 56-54 Ma. U-Pb dating of zircon from a volcanic-related breccia that cuts the host rocks of the Cerro Colorado Mine reveals a phase of volcanic activity at ca. 57 Ma, after formation of the regional Cretaceous Cerro Empexa Formation. This age range overlaps the ages derived for the intrusive porphyry units suggesting a close temporal relationship between volcanism and the ore-forming subvolcanic intrusions in Cerro Colorado. A link between active volcanism and mineralisation is reinforced by the ultrafine-grained matrix and the presence of strong brecciation associated with the monzonite-quartz porphyry stock suggesting decompression and volatile release have taken place during emplacement.

    DOI: 10.1016/j.oregeorev.2017.12.019

    Web of Science

  16. Isotopic and Chemical Evidence for Primitive Aqueous Alteration in the Tagish Lake Meteorite Reviewed

    Keisuke Sakuma, Hiroshi Hidaka, Shigekazu Yoneda

    Astrophysical Journal   Vol. 853 ( 1 )   2018.1

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Institute of Physics Publishing  

    Aqueous alteration is one of the primitive activities that occurred on meteorite parent bodies in the early solar system. The Tagish Lake meteorite is known to show an intense parent body aqueous alteration signature. In this study, quantitative analyses of the alkaline elements and isotopic analyses of Sr and Ba from acid leachates of TL (C2-ungrouped) were performed to investigate effects of aqueous alteration. The main purpose of this study is to search for isotopic evidence of extinct 135Cs from the Ba isotopic analyses in the chemical separates from the Tagish Lake meteorite. Barium isotopic data from the leachates show variable 135Ba isotopic anomalies (ϵ = -2.6 ∼ +3.6) which correlatewith 137Ba and 138Ba suggesting a heterogeneous distribution of s- and r-rich nucleosynthetic components in the early solar system. The 87Rb-87Sr and 135Cs-135Ba decay systems on TL in this study do not provide any chronological information. The disturbance of the TL chronometers is likely a reflection of the selective dissolution of Cs and Rb given the relatively higher mobility of Cs and Rb compared to Ba and Sr, respectively, during fluid mineral interactions.

    DOI: 10.3847/1538-4357/aaa1e3

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    Scopus

  17. Age-integrated tectonic evolution across the orogen-craton boundary: Age zonation and shallow- to deep crustal participation during Late Cambrian cratonisation of Eastern Ghats Belts, India Reviewed

    Amitava Chatterjee, Kaushik Das, Sankar Bose, Hiroshi Hidaka

    LITHOS   Vol. 290   page: 269 - 293   2017.10

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER SCIENCE BV  

    The Eastern Ghats Belt (EGB) is an orogenic belt which is known to evolve through Proterozoic time before cratonisation with Proto-India and holds an important key to the reconstruction of erstwhile supercontinents. To track the comprehensive evolution of the EGB with respect to Proto-India prior to and during its cratonisation, we carried out a detailed petrological and high-resolution geochronological investigation (zircon U-Pb SHRIMP and monazite U-Th-total Pb EPMA) on systematically sampled rocks from a transect across the western boundary of the EGB. Our results reveal that along a narrow zone near the thrust-bound margin between the EGB and Proto-India, the entire crustal segment, i.e. from deep-crustal granulites to mid-crustal cratonic amphibolites to shallow-crustal quartz breccia, was involved actively in the thrust-related tectonics during cratonisation of the EGB at similar to 550-500 Ma. This youngest imprint of the similar to 550-500 Ma event erased all the earlier age histories from the zircon and monazite grains of the marginal granulites. On the other hand, the older age-imprints are better preserved in the interior of the orogeny (similar to 30 km east of thrust-boundary between the EGB and the BC and further eastward) with little or no age-imprints of the final tectonic pulse. Combining all the new and earlier geochronological data with P-T calculations and textural characterisation, we propose a comprehensive and geochronologically well-constrained tectonic evolution of the EGB, which encompasses its earliest deep-crustal metamorphic to latest shallow-crustal sedimentation histories. The outcome of this study also reveals, for the first time, that the entire crustal section participated actively during the cratonisation. The new geochronological data coupled with field evidence and textural evidence from the shallow-crustal rock finally suggest that the thrusting vis-a-vis cratonisation was continued, at least, up to Late Cambrian, thus post-dating the Pan-African orogeny. (C) 2017 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.lithos.2017.07.020

    Web of Science

  18. Trace element composition and U-Pb age of zircons from Estherville: Constraints on the timing of the metal-silicate mixing event on the mesosiderite parent body Reviewed

    Makiko K. Haba, Akira Yamaguchi, Hiroyuki Kagi, Keisuke Nagao, Hiroshi Hidaka

    GEOCHIMICA ET COSMOCHIMICA ACTA   Vol. 215   page: 76 - 91   2017.10

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:PERGAMON-ELSEVIER SCIENCE LTD  

    Mesosiderites are a group of stony-iron meteorites, which are thought to be the result of mixing of silicates with Fe-Ni metal. In this study, we combined textural observations with geochemical and chronological studies of two zircon grains found in the Estherville mesosiderite. One of the zircons (Zrc1) occurs with pyroxene, plagioclase, troilite, and silica, and the other (Zrc2) is located at a boundary between Fe-Ni metal and a silicate part mainly composed of pyroxene and plagioclase. The textural observations demonstrate that Zrc1 is relatively homogenous, whereas Zrc2 is composed of at least two chemically distinct domains. Trace element analyses of Zrc2 resolve large concentration gradients within this single grain with variations that are an order of magnitude for rare earth elements (REE) and two orders of magnitude for U and Th. The lowest trace element concentration in Zrc2 is more than an order of magnitude lower than those of lunar and eucritic zircons. However, it is similar to those of Zrc1 and a zircon from the Vaca Muerta mesosiderite. The calculated REE composition of the melt in equilibrium with Zrc2 shows that Zrc2 and perhaps also Zrc1 did not crystallize from a melt that was produced by fractional crystallization of the primary magmatic mineral assemblages. The zircons with low REE, U, and Th concentrations can be interpreted to have formed in a residual melt after incorporation of large amounts of REE, U, and Th into secondary phosphate minerals, which formed during the metal-silicate mixing event. The large concentration gradients observed in Zrc2 suggest significant heterogeneities in the melt from which the zircon crystallized. Alternatively, either mixing or diffusion between a relict zircon and a newly formed zircon could explain the observed concentration gradients. However, the REE patterns of Zrc2 cannot be explained by mixing or diffusion between the two distinct generations of zircons. These considerations suggest that Zrc1 and Zrc2 formed during a high-temperature reheating event, which is probably related to the metalsilicate mixing event. The weighted average Pb-207-Pb-206 age obtained by SIMS from both zircons is 4521 +/- 26 Ma (2 sigma). This age is younger than that of a primary magmatic zircon from Vaca Muerta (4563 +/- 15 Ma) and probably corresponds to the timing of the metal-silicate mixing event or a later impact event. (C) 2017 Elsevier Ltd. All rights reserved.

    DOI: 10.1016/j.gca.2017.07.028

    Web of Science

  19. Isotopic Evidence for Multi-stage Cosmic-ray Exposure Histories of Lunar Meteorites: Long Residence on the Moon and Short Transition to the Earth Reviewed

    Hiroshi Hidaka, Keisuke Sakuma, Kunihiko Nishiizumi, Shigekazu Yoneda

    ASTRONOMICAL JOURNAL   Vol. 153 ( 6 )   2017.6

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:IOP PUBLISHING LTD  

    It is known that most lunar meteorites have complicated cosmic-ray exposure experiences on the Moon and in space. In this study, cosmic-ray irradiation histories of six lunar meteorites, Dhofar 489, Northwest Africa 032 (NWA 032), NWA 479, NWA 482, NWA 2995, and NWA 5000, were characterized from neutron-captured isotopic shifts of Sm and Gd, and from the abundances of long-lived cosmogenic radionuclides like Be-10, Al-26, Cl-36, and Ca-41. Sm and Gd isotopic data of all of six meteorites show significant isotopic shifts of Sm-149-Sm-150 and Gd-157-Gd-158 caused by accumulation of neutron capture reactions due to cosmic-ray irradiation, corresponding to the neutron fluences of (1.3-9.6). x. 10(16) n cm(-2). In particular, very large Sm and Gd isotopic shifts of NWA 482 are over those of a lunar regolith 70002, having the largest isotopic shifts among the Apollo regolith samples, corresponding to cosmic-ray exposure duration over 800 million years in the lunar surface (2 pi irradiation). Meanwhile, the concentrations of cosmogenic radionuclides for individual six meteorites show the short irradiation time less than one million years as their bodies in space (4 pi irradiation). Our data also support the results of previous studies, revealing that most of lunar meteorites have long exposure ages at shallow depths on the Moon and short transit times from the Moon to the Earth.

    DOI: 10.3847/1538-3881/aa7139

    Web of Science

  20. Zircon U-Pb SHRIMP and monazite EPMA U-Th-total Pb geochronology of granulites of the western boundary, Eastern Ghats Belt, India: A new possibility for Neoproterozoic exhumation history Reviewed

    A. Chatterjee, K. Das, S. Bose, P. Ganguly, H. Hidaka

    Geological Society Special Publication   Vol. 457 ( 1 ) page: 105 - 140   2017

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

    We present detailed and high-precision geochronological data on granulites occurring along the western boundary of the Eastern Ghats Belt, India. Age data on systematically sampled rocks coupled with geochemical observation have a potential to unravel the overprinted tectonothermal events operated during Precambrian time. Zircon U-Pb SHRIMP and monazite electron probe microanalysis (EPMA) U-Th-total Pb analyses, chemical zoning, microtextural investigation, and pressure-temperature calculations were carried out on samples of four different rock types. Inherited zircons from migmatitic quartzofeldspathic gneiss and mafic granulite yielded ages of approximately 2900-2350 Ma, representing an older crustal component. The age of granulite metamorphism recorded from charnockite and pelitic granulite ranges between approximately 950 and 930 Ma (from zircon and monazite). A possible decompression event from this area that occurred during Rodinia break-up is recorded from the Y-rich zones of monazite closely associated with porphyroblastic garnet in pelitic granulite and dates from approximately 800 to 750 Ma. Zircon grains of charnockite also yield a similar age. The youngest age of approximately 525-510 Ma documented from the monazite grains of migmatitic quartzofeldspathic gneiss and pelitic granulite, along with a spot age from zircon of migmatitic quartzofeldspathic gneiss, testifies to the final assembly of East Antarctica with cratonic India as a part of East Gondwana.

    DOI: 10.1144/SP457.1

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    Scopus

  21. Neoarchean tectonothermal imprints in the Rengali Province, eastern India and their implication on the growth of Singhbhum Craton: evidence from zircon U-Pb SHRIMP data Reviewed

    S. Bose, K. Das, K. Kimura, H. Hidaka, A. Dasgupta, G. Ghosh, J. . Mukhopadhyay

    JOURNAL OF METAMORPHIC GEOLOGY   Vol. 34 ( 8 ) page: 743 - 764   2016.10

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    A detailed zircon U-Pb (SHRIMP) geochronological study of the amphibolite to granulite-grade rocks of the Rengali Province of eastern India records the growth history of the southern margin of the Singhbhum Craton. Pelitic and mafic granulites from the gneissic belt exhibit contrasting styles of metamorphism. Zircon of the pelitic granulites from the eastern segment yields c. 3528-3064 Ma detrital ages. Charnockitic gneiss from the eastern segment has protolith age of 3058 +/- 15 Ma while that from the central segment has protolith age of 2861 +/- 30 Ma. The latter rock records high-grade metamorphism at 2818 +/- 15 Ma. Hornblende gneiss from the central sector has a protolith age of 2828 +/- 9 Ma. Deformed leucogranite in the central and undeformed granitoid in the eastern segment were emplaced at 2807 +/- 13 and 2809 +/- 13 Ma respectively. The protolith of felsic gneiss from the central sector was emplaced at 2776 +/- 24 Ma. Most of the zircon samples contain overgrowths of c. 2500 Ma, inferred to be the age of reworking of the gneissic belt. Our data suggest that the Rengali Province evolved as an orogenic belt in the Neoarchean time (c. 2800-2500 Ma) during southward growth of the Singhbhum Craton. These tectonothermal imprints at the margin of the Singhbhum Craton are possibly related to its inclusion within the supercontinent Ur.

    DOI: 10.1111/jmg.12201

    Web of Science

  22. Detrital zircon geochronology (U-Pb SHRIMP and LA-ICPMS) from the Ampani Basin, Central India: Implication for provenance and Mesoproterozoic tectonics at East Indian cratonic margin Reviewed

    Subhojit Saha, Kaushik Das, Hiroshi Hidaka, Kosuke Kimura, Partha Pratim Chakraborty, Yasutaka Hayasaka

    PRECAMBRIAN RESEARCH   Vol. 281   page: 363 - 383   2016.8

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    The present study aims at tracking sediment provenance for a Mesoproterozoic craton-margin basin in eastern India, i.e. the Ampani Basin. Occurring on the eastern flank of the Archean Bastar Craton, the basin occupies a very strategic geographic position coinciding with the boundary between Archean craton and a Proterozoic orogenic belt with spatially varied tectonothermal history. The studied basin succession includes unmetamorphosed siliciclastic sediments deposited under three different environmental set-up viz. fluvial, shoreface and shelf. The basin sediment package defines a fining-upward succession with fluvial products at its base, shoreface deposits in the middle and shelf sandstone-siltstone-shale sediments at the top. In this study sandstone-siltstone and shale units encompassing the entire basin succession are analyzed geochemically and with U-Pb detrital zircon geochronology in order to characterize the sediment source/s. The basin was fed mainly by the Paleoarchean to late Paleoproterozoic granitoid source with minor contribution from mafic source particularly at the closing part of its depositional history. Except for relative enrichment, REE and trace element patterns of the three arenaceous units, viz. fluvial, shoreface, shelf sandstone are quite similar. U-Pb analysis of detrital zircon grains from the three units indicate that in the initial phase of basin deposition, sediments were sourced from Paleo- to Neoarchean and Palaeoproterozoic (with an age spread from ca. 3700 to 2400 Ma) provenance. From the middle shoreface part upwards, the Paleo- to Neoarchean sources fade away and a new Mesoproterozoic source (Co. 2000 -1700 Ma) was added with the continued Paleoproterozoic source/s. The youngest zircon populations of the three analyzed units yield an upper age limit of sedimentation at 2079 +/- 44 Ma (lower being close to 1446 +/- 21 Ma, as evident from the age of tuffaceous rocks on the middle shoreface part of the basin). The change in detrital zircon age spectra from the middle part of the stratigraphy might be due to some basin-adjacent tectonic activities. (C) 2016 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.precamres.2016.06.011

    Web of Science

  23. REDISTRIBUTION OF ALKALINE ELEMENTS IN ASSOCIATION WITH AQUEOUS ACTIVITY IN THE EARLY SOLAR SYSTEM Reviewed

    Hiroshi Hidaka, Takuya Higuchi, Shigekazu Yoneda

    ASTROPHYSICAL JOURNAL   Vol. 815 ( 1 )   2015.12

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    It is known that the Sayama meteorite (CM2) shows an extensive signature for aqueous alteration on the meteorite parent body, and that most of the primary minerals in the chondrules are replaced with phyllosilicates as the result of the aqueous alteration. In this paper, it is confirmed from the observation of two-dimensional Raman spectra that a part of olivine in a chondrule collected from the Sayama chondrite is serperntinized. Ion microprobe analysis of the chondrule showed that alkaline elements such as Rb and Cs are heterogeneously redistributed in the chondrule. The result of higher Rb and Cs contents in serpentinized phases in the chondrule rather than in other parts suggested the selective adsorption of alkaline elements into the serpentine in association with early aqueous activity on the meteorite parent body. Furthermore Ba isotopic analysis provided variations of Ba-135/Ba-138 and Ba-137/Ba-138 in the chondrule. This result was consistent with our previous isotopic data suggesting isotopic evidence for the existence of the presently extinct nuclide Cs-135 in the Sayama meteorite, but the abundance of Cs-135 in the solar system remains unclear because of large analytical uncertainties.

    DOI: 10.1088/0004-637X/815/1/76

    Web of Science

  24. The Watonga Formation and Tacking Point Gabbro, Port Macquarie, Australia: Insights into crustal growth mechanisms on the eastern margin of Gondwana Reviewed

    Solomon Buckman, Allen P. Nutman, Jonathan C. Aitchison, Joseph Parker, Sarah Bembrick, Tom Line, Hiroshi Hidaka, Tomoyuki Kamiichi

    GONDWANA RESEARCH   Vol. 28 ( 1 ) page: 133 - 151   2015.8

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    A diverse assemblage of accretionary complex, island-arc, ophiolitic and high-pressure, low-temperature metamorphic rocks occurs within the serpentinite melange at Port Macquarie on the eastern extremity of the New England Orogen of eastern Australia. New field observations, U-Pb zircon dating, petrography and geochemistry presented here establish a more robust chronology and interpretation of these rocks. Previously, all basalt, chert and volcaniclastic sandstones at Port Macquarie were grouped into the Watonga Formation. Ordovician to middle Devonian radiolarians and conodonts from 'Watonga' chert-basalt associations shows that they are older than, and unrelated to, 'Watonga' volcaniclastic rocks like those at Green Mound which contain volcanic/detrital zircons as young as 335 Ma that were derived from a Carboniferous arc. Volcanic detritus with pillow lava forming a block within the serpentinite melange yielded 452 +/- 10 Ma igneous zircons, indicating an Ordovician age. The Tacking Point Gabbro has an age of 390 +/- 7 Ma (Devonian) and geochemical affinities with intra-oceanic arc igneous suites. It was intruded into deformed cherts of the Watonga Formation giving a spatial link between an Ordovician-Devonian? Accretionary complex and adjacent Devonian island-arc. The MORE-like basalt-chert association of the Watonga Formation and the Devonian Tacking Point gabbro represents a mid-Paleozoic assemblage allochthonous to Gondwana, which possibly correlates with the Djungati and Gamilaroi terranes respectively located further west in the New England Orogen. Zircon dating shows that post-serpentinite mafic-felsic dykes were emplaced into the Port Macquarie serpentinite at 247 +/- 20 Ma and further disrupted. Therefore, tectonism affecting the serpentinite continued into the Early Triassic, with final movement during the Hunter-Bowen Orogeny. Our results from Port Macquarie are compatible with a tectonic model for the New England Orogen that involves episodic island-arc collisional events (Gamilaroi and Gympie terranes) interspersed with periods of continental margin "Andean-type" magmatism and accretion along eastern Gondwana. Crown Copyright (C) 2014 Published by Elsevier B.V. on behalf of International Association for Gondwana Research. All rights reserved.

    DOI: 10.1016/j.gr.2014.02.013

    Web of Science

  25. Isotopic excesses of proton-rich nuclei related to space weathering observed in a gas-rich meteorite Kapoeta Reviewed

    H. Hidaka and S. Yoneda

    The Astrophysical Journal     2014

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  26. Major and trace elements of zircons from basaltic eucrites: Implications for the formation of zircons on the eucrites parent body Reviewed

    M. Haba, A. Yamaguchi, K. Horie and H. Hidaka

    Earth and Planetary Science Letters   Vol. 387   page: 10 - 21   2014

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  27. Geochronological constrains on Meso- and Neoarchean regional metamorphism and magmatism in the Dharwar craton, southern India Reviewed International coauthorship

    M. Jayananda, Y. Tsutsumi, T. Miyazaki, R.V. Gireesh, K-U. Kapfo, Tushipokla, H. Hidaka and T. Kano

    Journal of Asian Earth Sciences   Vol. 78   page: 18 - 38   2013

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  28. Middle Carboniferous-Early Triassic eclogite-blueschist blocks within a serpentinite mélange at Port Macquarie, eastern Australia: Implications for the evolution of Gondwana’s eastern margin Reviewed International coauthorship

    A. Nutman, S. Buckman, H. Hidaka, T. Kamiichi, E. Belousova, J. Aitchison

    Gondwana Research   Vol. 24   page: 1038 - 1050   2013

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  29. Evolution of a Cambrian active continental margin: the Delamerian-Lachlan connection in southeastern Australia from a zircon perspective Invited Reviewed International coauthorship

    C.L. Fergusson, A. Nutman, T. Kamiichi and H. Hidaka

    Gondwana Research   Vol. 24   page: 1051 - 1066   2013

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  30. The Itsaq gneiss complex of Greenland: Episodic 3900-3660 Ma juvenile crust formation and recycling in the 3660-3600 Ma juvenile crust formation and recycling in the 3660-3600 Ma Isukasian orogeny Reviewed International coauthorship

    A. Nutman, V. Bennett, C.R.L. Friend, H. Hidaka, K. Yi, S.-R. Lee, T. Kamiichi

    American Journal of Science   Vol. 313   page: 877 - 911   2013

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  31. Potential Mesozoic reference zircon from the Unazuki plutonic complex: geochronological and geochemical characterization Reviewed

    K. Horie, M. Takehara, Y. Suda and H. Hidaka

    Island Arc   Vol. 22   page: 292 - 305   2013

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  32. Radioactive Cs capture in the early solar system Invited Reviewed

    H. Hidaka and S. Yoneda

    Scientific Reports     2013

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    DOI: 10.1038/srep01130

  33. Heterogeneous isotopic anomalies of Sm and Gd in the Norton County meteorite: Evidence for irradiation from the active early Sun Reviewed

    H. Hidaka, T. Kondo and S. Yoneda

    The Astrophysical Journal   Vol. 746 ( 132 ) page: 1 - 8   2012

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  34. Diverse nucleosynthetic components in barium isotopes of primitive meteorites: Incomplete mixing of s- and r-process isotopes and extinct 135Cs in the early solar system Reviewed

    H. Hidaka and S. Yoneda

    Geochimica et Cosmochimica Acta   Vol. 75   page: 3687 - 3697   2011

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  35. Neutron capture records of mesosiderites and an iron meteorite Reviewed

    H. Hidaka and S. Yoneda

    Geochimica et Cosmochimica Acta   Vol. 75   page: 5706 - 5715   2011

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  36. Formation and geochemical significance of micro-metallic aggregates including fissiogenic platinum group elements in the Oklo natural reactor, Gabon Reviewed International coauthorship

    M. Kikuchi, H. Hidaka and F. Gauthier-Lafaye

    Geochimica et Cosmochimica Acta   Vol. 74   page: 4709 - 4722   2010

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  37. A neutron capture study of the Jilin chondrite Reviewed International coauthorship

    H. Hidaka, S. Yoneda and K. Nishiizumi

    Meteoritics and Planetary Sciences   Vol. 45   page: 1973 - 1981   2010

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  38. Eoarchean-Paleoproterozoic zircon inheritance in Japanese Permo-Triassic granites (Unazuki area, Hida Metamorphic Complex): Unearthing more old crust and identifying source terrranes Invited Reviewed International coauthorship

    K. Horie, M. Yamashita, Y. Hayasaka, Y. Katoh, Y. Tsutsumi, H. Hidaka, H. Kim, M. Cho

    Precambrian Research   Vol. 183   page: 145 - 157   2010

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  39. The complex age of orthogneiss protoliths exemplified by the Eoarchaen Itsaq Gneiss Complex (Greenland): SHRIMP and old rocks Invited Reviewed

    K. Horie, A.P. Nutman, C.R.L. Friend and H. Hidaka

    Precambrian Research   Vol. 183   page: 25 - 43   2010

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  40. SHRIMP in situ isotopic analyses of REE, Pb and U in micro-minerals bearing fission products in the Oklo and Bangombé natural reactors: A review of a natural analogue study for the migration of fission products Invited Reviewed

    H. Hidaka and M. Kikuchi

    Precambrian Research   Vol. 183   page: 158 - 165   2010

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  41. Detrital heavy minerals, white-mica and zircon geochronology in the Ordovician South Mayo Trough, western Ireland: signatures of the Grampian Progeny Reviewed International coauthorship

    M. Mange, B. Idleman, Q.-Z. Yin, H. Hidaka and J. Dewey

    Journal of Geological Society, London   Vol. 167   page: 1147 - 1160   2010

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  42. Crystallization of REE minerals and redistribution of U, Th, and REE at contact boundary between granite and gabbro during hydrothermal alteration Reviewed International coauthorship

    K. Horie, Y. Tsutsumi, M. Cho, Y. Morishita and H. Hidaka

    Physics and Chemistry of the Earth   Vol. 35   page: 284 - 291   2010

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  43. Isotopic evidence of non-thermalized neutron irradiation in solar-gas-rich meteorites: Possibility of the interaction with solar neutrons and activity from the early Sun Reviewed

    H. Hidaka and S. Yoneda

    Earth and Planetary Science Letters   Vol. 285   page: 173 - 178   2009

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  44. SHRIMP U-Pb dating of detrital zircons from the Sanbagawa Belt, Kanto Mountains, Japan: need to revise the framework of the belt Reviewed

    Y. Tsutsumi, A. Miyashita, K. Terada and H. Hidaka

    Journal of Mineralogical and Petrological Sciences   Vol. 104   page: 12 - 24   2009

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  45. In-situ U-Pb analyses of highly altered zircon from sediments over laying the Bangombé natural fission reactor Invited Reviewed

    M. Kikuchi and H. Hidaka

    Geoscience Journal   Vol. 13   page: 257 - 264   2009

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  46. A U-Pb geochronological study of migmatic gneiss in the Busan gneiss complex, Gyeonggi massif, Korea Invited Reviewed International coauthorship

    K. Horie, Y. Tsutsumi, H. Kim, M. Cho, H. Hidaka, K. Terada

    Geoscience Journal   Vol. 13   page: 205 - 215   2009

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  47. Cosmic-ray exposure histories of Martian meteorites studied from neutron capture reactions of Sm and Gd isotopes Reviewed International coauthorship

    H. Hidaka, S. Yoneda and K. Nishiizumi

    Earth and Planetary Science Letters   Vol. 288   page: 564 - 571   2009

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  48. The oldest (ca. 2.51 Ga) rock in South Korea: U-Pb zircon age of a tonalitic migmatite, Daeijak Island, western Gyeonggi massif Reviewed International coauthorship

    M. Cho, H. Kim, Y. Lee, K. Horie and H. Hidaka

    Geoscience Journal   Vol. 12   page: 1 - 6   2008

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  49. Geochemical behavior of radionuclides in highly altered zircon above the Bangombé natural fission reactor, Gabon Invited Reviewed

    M. Kikuchi, H. Hidaka and K. Horie

    Physics and Chemistry of the Earth   Vol. 33   page: 978 - 982   2008

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  50. Elemental distribution in apatite, titanite and zircon during hydrothermal alteration: Durability of immobilization mineral phases for actinides Invited Reviewed International coauthorship

    K. Horie, H. Hidaka and F. Gauthier-Lafaye

    Physics and Chemistry of the Earth   Vol. 33   page: 962 - 968   2008

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  51. Ba isotopic signature for early differentiation between Cs and Ba in natural fission reactors Reviewed International coauthorship

    H. Hidaka and F. Gauthier-Lafaye

    Geochimica et Cosmochimica Acta   Vol. 72   page: 4123 - 4135   2008

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

  52. The Itsaq Gneiss Complex of southern west Greenland and the construction of eoarchaean crust at convergent plate boundaries Invited Reviewed International coauthorship

    A. Nutman, C.R.L. Friend, K. Horie and H. Hidaka

    Earth’s Oldest Rocks Developments in Precambrian Geology   Vol. 15   page: 187 - 218   2007

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    Language:English   Publishing type:Part of collection (book)  

  53. Zircon ‘microvein’ in peralkaline granitic gneiss, western Ethiopia: Origin, SHRIMP U-Pb geochronology and trace element investigations Reviewed International coauthorship

    T. Kebede, K. Horie, H. Hidaka and K. Terada

    Chemical Geology   Vol. 242   page: 76 - 102   2007

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  54. The role of mass spectrometry in the Oklo-Bangombé natural reactors Reviewed International coauthorship

    J.R. DeLaeter and H. Hidaka

    Mass Spectrometry Reviews   Vol. 26   page: 683 - 712   2007

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  55. Sm and Gd isotopic shifts of the Apollo 16 and 17 drill stem samples and their implication for regolith history Reviewed

    H. Hidaka and S. Yoneda

    Geochimica et Cosmochimica Acta   Vol. 71   page: 1074 - 1086   2007

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  56. Noble gas and oxygen isotope studies of aubrites: a clue to origin and histories Reviewed International coauthorship

    Y. Miura, H. Hidaka, K. Nishiizumi and M. Kusakabe

    Geochimica et Cosmochimica Acta   Vol. 71   page: 251 - 270   2007

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  57. Early Archean to middle Jurassic evolution of the Korean Peninsula and its correlation with Chinese cratons: SHRIMP U-Pb zircon age constraints Reviewed International coauthorship

    H. Jeon, M. Cho, H. Kim, K. Horie and H. Hidaka

    Journal of Geology   Vol. 115   page: 525 - 539   2007

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  58. Geochemical characteristics of an ancient nuclear reactor “Oklo” Invited Reviewed

    H. Hidaka

    Journal of Nuclear and Radiochemical Sciences   Vol. 8   page: 65 - 69   2007

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  59. ~3850 Ma tonalites in the Nuuk region, Greenland: Geochemistry and their reworking within an Eoarchaean gneiss complex Reviewed International coauthorship

    A.P. Nutman, V. Bennett, Friend, K. Horie and H. Hidaka

    Contributions to Mineralogy and Petrology   Vol. 154   page: 385 - 408   2007

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  60. Redistribution of REE, Pb and U by supergene weathering studied from in-situ isotopic analyses of the Bangombé natural reactor, Gabon Reviewed International coauthorship

    M. Kikuchi, H. Hidaka, K. Horie and F. Gauthier-Lafaye

    Geochimica et Cosmochimica Acta   Vol. 71   page: 4716 - 4726   2007

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  61. Transport and selective uptake of radium into natural clay minerals Reviewed International coauthorship

    H. Hidaka, K. Horie and F. Gauthier-Lafaye

    Earth and Planetary Science Letters   Vol. 264   page: 167 - 176   2007

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  62. Natural immobilization processes aid the understanding of long-term evolution of deep geological radioactive waste repositories Invited Reviewed International coauthorship

    W.R. Alexander, R. Giere, H. Hidaka and H. Yoshida

    Geochemistry-Exploration Environment Analysis   Vol. 6   page: 3 - 4   2006

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  63. Element distribution in zircon: Alteration and radiation-damage effects Reviewed International coauthorship

    K. Horie, H. Hidaka and F. Gauthier-Lafaye

    Physics and Chemistry of the Earth   Vol. 31   page: 587 - 592   2006

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  64. Regolith history of the aubritic meteorite parent body revealed by neutron capture effects on Sm and Gd isotopes Reviewed International coauthorship

    H. Hidaka, S. Yoneda, and K. Marti

    Geochimica et Cosmochimica Acta   Vol. 70   page: 3449 - 3456   2006

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  65. Eu isotope measurements on single SiC grains from the Murchison meteorite; A new probe of s-process conditions in parent Asymptotic Giant Branch stars Reviewed International coauthorship

    K. Terada, K. Itoh, H. Hidaka, T. Yoshida, W. Aoki and I.S. Williams

    New Astronomy Reviews   Vol. 50   page: 582 - 586   2006

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  66. 4.2 Ga zircon xenocryst in an Acasta Gneiss from northwestern Canada; Evidence for early continental crust Reviewed International coauthorship

    T. Iizuka, K. Horie, T. Komiya, S. Maruyama, T. Hirata, H. Hidaka and B.F. Windley

    Geology   Vol. 34   page: 245 - 248   2006

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  67. 743 +/- 17 Ma granite clast from Jurassic conglomerate, Kamiaso, Mino Terrane, Japan: The case for South China Craton provenance (Korean Gyeonggi Block?) Reviewed International coauthorship

    A.P. Nutman, Y. Sano, K. Terada and H. Hidaka

    Journal of Asian Earth Sciences   Vol. 26   page: 99 - 104   2006

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  68. SHRIMP U-Pb dating of detrital zircons in paragneiss from Oki-Dogo Island, western Japan Reviewed

    Y. Tsutsumi, K. Yokoyama, K. Horie, K. Terada and H. Hidaka

    Journal of Mineralogical and Petrological Sciences   Vol. 101   page: 289 - 298   2006

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  69. Isotopic compositions of the elements, 2001 Reviewed International coauthorship

    J.K. Bohlke, J.R. DeLaeter, P. DeBievre, H. Hidaka, H.S. Peiser, K.J.R. Rosman, P.D.P. Taylor

    Journal of Physical and chemical reference data   Vol. 34   page: 57 - 67   2005

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  70. Geochemical fixation of rare earth elements into secondary minerals from sandstones beneath a natural fission reactor at Bangombé, Gabon Reviewed International coauthorship

    H. Hidaka, J. Jeneczek, F.N. Skomurski, R.C. Ewing and F. Gauthier-Lafaye

    Geochimica et Cosmochimica Acta   Vol. 69   page: 685 - 694   2005

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  71. Technetium in cosmo- and geochemical fields Invited Reviewed

    H. Hidaka

    Journal of Nuclear and Radiochemical Sciences   Vol. 6   page: 249 - 252   2005

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  72. Geochemical evidence of double beta decay of 100Mo Reviewed International coauthorship

    H. Hidaka, C.V. Ly, and K. Suzuki

    Physical Review C   Vol. 70 ( 025501 ) page: 1 - 4   2004

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  73. Isotopic evidence for trapped fissiogenic REE and nucleogenic Pu in apatite and Pb evolution at the Oklo natural reactor Reviewed International coauthorship

    K. Horie, H. Hidaka and F. Gauthier-Lafaye

    Geochimica et Cosmochimica Acta   Vol. 68   page: 115 - 125   2004

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  74. Redistribution of U, Pb and REE in association with alteration of uranium minerals from the Koongarra deposit, Northern Territory Reviewed

    K. Horie and H. Hidaka

    Radiochimica Acta   Vol. 92   page: 805 - 808   2004

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  75. Determination of ruthenium contents in terrestrial minerals by isotope dilution mass spectrometry after preconcentration via distillation Reviewed International coauthorship

    C.V. Ly and H. Hidaka

    Geochemical Journal   Vol. 38   page: 485 - 490   2004

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    Authorship:Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  76. Mobilization and mechanisms of retardation in the Oklo natural reactor zone 2 (Gabon): Inferences from U, REE, Zr, Mo and Se isotopes Reviewed International coauthorship

    R. Bros, H. Hidaka, G. Kamei and T. Ohnuki

    Applied Geochemistry   Vol. 18   page: 1807 - 1824   2003

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

  77. Atomic weight of the elements review 2000 Reviewed International coauthorship

    J.R. DeLaeter, J.K. Böhlke, P. DeBièvre, H. Hidaka, H.S. Peiser, K.J.R. Rosman and P.D.P. Taylor

    Pure and Applied Chemistry   Vol. 75   page: 683 - 799   2003

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

  78. Nucleosynthetic component of early solar system inferred from Ba isotopic compositions in carbonaceous chondrites Reviewed

    H. Hidaka, Y. Ohta and S. Yoneda

    Earth and Planetary Science Letters   Vol. 214   page: 455 - 466   2003

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  79. U-Pb geochronology and REE geochemistry of zircons from Palaeoproterozoic paragneiss clasts in the Mesozoic conglomerate, central Japan: evidence for an Archean provenance Reviewed

    H. Hidaka, H. Shimizu and M. Adachi

    Chemical Geology   Vol. 187   page: 279 - 293   2002

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  80. Isotopic search for live 135Cs in the early solar system and possibility of 135Cs-135Ba chronometer Reviewed International coauthorship

    H. Hidaka, Y. Ohta, S. Yoneda and J.R. DeLaeter

    Earth and Planetary Science Letters   Vol. 193   page: 459 - 466   2001

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  81. Alteration of monazite and zircon and lead migration as geochemical traces of fluid paleocirculations around the Oklo-Okelobondo and Bangombé natural nuclear reaction zones (Franceville basin, Gabon) Reviewed International coauthorship

    M. Mathieu, L. Zetterstrom, M. Cuney, F. Gauthier-Lafaye and H. Hidaka

    Chemical Geology   Vol. 171   page: 147 - 171   2001

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)  

  82. Neutron capture effects on Sm and Gd isotopes in uraninites Reviewed International coauthorship

    H. Hidaka and F. Gauthier-Lafaye

    Geochimica et Cosmochimica Acta   Vol. 65   page: 941 - 949   2001

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  83. Ion microprobe U-Pb zircon geochronology of the Hida gneiss: Finding of the oldest minerals in Japan Reviewed

    Y. Sano, H. Hidaka, K. Terada, H. Shimizu and M. Suzuki

    Geochemical Journal   Vol. 34   page: 135 - 153   2000

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

  84. Neutron capture effects on Sm, Eu and Gd in Apollo 15 deep drill core samples Reviewed

    H. Hidaka, M. Ebihara and S. Yoneda

    Meteoritics and Planetary Sciences   Vol. 35   page: 581 - 589   2000

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  85. Redistribution of fissiogenic and non-fissiogenic REE, Th and U in and around natural fission reactors at Oklo and Bangombé, Gabon Reviewed International coauthorship

    H. Hidaka and F. Gauthier-Lafaye

    Geochimica et Cosmochimica Acta   Vol. 64   page: 2093 - 2108   2000

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  86. Nuclear interaction at Oklo 2 billion years ago Reviewed International coauthorship

    Y. Fujii, T. Fukahori, H. Hidaka, A. Iwamoto, P. Moller, M. Nakagawa, T. Ohnuki and Y. Ohura

    Nuclear Physics B   Vol. 573   page: 377 - 401   2000

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

  87. Isotopic study of neutron capture effects on Sm and Gd in chondrites Reviewed

    H. Hidaka, M. Ebihara and S. Yoneda

    Earth and Planetary Science Letters   Vol. 180   page: 29 - 37   2000

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  88. Ion-microprobe analysis of rare earth elements in oceanic basalt glass Reviewed

    Y. Sano, K. Terada, H. Hidaka, Y. Nishio, H. Amakawa and Y. Nozaki

    Analytical Sciences   Vol. 15   page: 743 - 748   1999

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

  89. Isotopic study of natural fission reactors at Oklo and Bangombé, Gabon Invited Reviewed

    H. Hidaka

    Journal of Radioanalytical and Nuclear Chemistry   Vol. 239   page: 53 - 58   1999

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  90. Tc/Ru fractionation in the Oklo and Bangombé natural fission reactors, Gabon Reviewed International coauthorship

    H. Hidaka, P. Holliger and F. Gauthier-Lafaye

    Chemical Geology   Vol. 155   page: 323 - 333   1999

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  91. High fluences of neutrons determined from Sm and Gd isotopic compositions in aubrites Reviewed

    H. Hidaka, M. Ebihara and S. Yoneda

    Earth and Planetary Science Letters   Vol. 173   page: 41 - 51   1999

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  92. Ion microprobe U-Pb dating of apatite Reviewed

    Y. Sano, T. Ohyama, K.Terada and H. Hidaka

    Chemical Geology   Vol. 153   page: 249 - 258   1999

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)  

  93. Palaeo-proterozoic thermal events recorded in the ~4.0 Ga Acasta gneiss, Canada: Evidence from SHRIMP U-Pb dating of apatite and zircon Reviewed International coauthorship

    Y. Sano, K. Terada, H. Hidaka, K. Yokoyama and A. Nutman

    Geochimica et Cosmochimica Acta   Vol. 63   page: 899 - 905   1999

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

  94. Isotopic analyses by using a Sensitive High Resolution Ion Micro-Probe (SHRIMP) for natural analogue study of Oklo and Bangombé natural fission reactors Invited Reviewed

    H. Hidaka

    Radiochimica Acta   Vol. 82   page: 327 - 330   1998

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  95. Geochemical and neutronic characteristics of the natural fossil fission reactors at Oklo and Bangombé (Gabon) Reviewed International coauthorship

    H. Hidaka and P. Holliger

    Geochimica et Cosmochimica Acta   Vol. 62   page: 89 - 108   1998

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  96. An ICP-MS analysis of geological standard rocks for Y, lanthanoids, Th and U Reviewed

    K. Shinotsuka, H. Hidaka , M. Ebihara and H. Nakahara

    Analytical Sciences   Vol. 12   page: 917 - 922   1996

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

  97. Detailed abundances of rare earth elements, thorium and uranium in chondritic meteorites: An ICP-MS study Reviewed

    K. Shinotsuka, H. Hidaka and M. Ebihara

    Meteoritics   Vol. 30   page: 694 - 699   1995

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

  98. Determination of the isotopic compositions of samarium and gadolinium by thermal ionization mass spectrometry Reviewed

    H. Hidaka, M. Ebihara and M. Shima

    Analytical Chemistry   Vol. 67   page: 1437 - 1441   1995

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  99. Chemical properties of Central African carbonado and its genetic implications Reviewed

    H. Kagi, K. Takahashi, H. Hidaka and A. Masuda

    Geochimica et Cosmochimica Acta   Vol. 58   page: 2629 - 2638   1994

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

  100. Isotopic evidence for the retention of 90Sr inferred from excess 90Zr at the Oklo natural fission reactors: Implication for geochemical behaviour of fissiogenic Rb, Sr, Cs and Ba Reviewed International coauthorship

    H. Hidaka, T. Sugiyama, M. Ebihara and P. Holliger

    Earth and Planetary Science Letters   Vol. 122   page: 173 - 182   1994

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  101. Migration of fission products into micro-minerals of the Oklo natural reactors Invited Reviewed International coauthorship

    H. Hidaka, K. Takahashi and P. Holliger

    Radiochimica Acta   Vol. 66/67   page: 463 - 468   1994

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  102. オクロ鉱床によるナチュラル・アナログ研究の現状と展望 Invited Reviewed

    日高 洋

    地球化学   Vol. 28   page: 143 - 154   1994

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Research paper (scientific journal)  

  103. Geochemical behaviour of 99Tc in the Oklo natural fission reactors Invited Reviewed International coauthorship

    H. Hidaka, K. Shinotsuka and P. Holliger

    Radiochimica Acta   Vol. 63   page: 19 - 22   1993

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  104. Isotopic search for spontaneous fission-produced Ru, Ag and Te in uraninite Reviewed

    H. Hidaka and A. Masuda

    Chemical Geology   Vol. 106   page: 187 - 195   1993

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  105. Evidence of fissiogenic Cs estimated from Ba isotopic deviations in an Oklo natural reactor zone Reviewed International coauthorship

    H. Hidaka, P. Holliger and A. Masuda

    Earth and Planetary Science Letters   Vol. 114   page: 391 - 396   1993

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  106. Lanthanide tetrad effect observed in the Oklo and ordinary uraninites and its implication for their forming processes Reviewed International coauthorship

    H. Hidaka, P. Holliger, H. Shimizu and A. Masuda

    Geochemical Journal   Vol. 26   page: 337 - 346   1992

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  107. Reconstruction of cumulative fission yield curve and geochemical behaviors of fissiogenic nuclides in the Oklo natural reactors Reviewed

    H. Hidaka, T. Konishi and A. Masuda

    Geochemical Journal   Vol. 26   page: 227 - 239   1992

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  108. Estimation of burnup in the Oklo natural nuclear from ruthenium isotopic composition Reviewed

    H. Hidaka, N. Kano and A. Masuda

    Journal of Radioanalytical and Nuclear Chemistry Letters   Vol. 155   page: 107 - 113   1991

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  109. Abundance of fissiogenic and pre-reactor natural rare-earth elements in a uranium ore sample from Oklo Reviewed

    H. Hidaka, A. Masuda, I. Fujii and H. Shimizu

    Geochemical Journal   Vol. 22   page: 47 - 54   1988

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

  110. Nuclide analyses of rare earth elements of the Oklo uranium ore samples: A new method to estimate the neutron fluence Reviewed

    H. Hidaka and A. Masuda

    Earth and Planetary Science Letters   Vol. 88   page: 330 - 336   1988

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

▼display all

Books 4

  1. 放射化学の事典 日本放射化学会編 Reviewed

    日高 洋( Role: Edit ,  宇宙・地球化学)

    朝倉書店  2015.9  ( ISBN:978-4-254-14098-9

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    Total pages:376   Language:Japanese Book type:Dictionary, encyclopedia

  2. 地球と宇宙の化学事典 日本地球化学会編 Reviewed

    日高 洋( Role: Contributor)

    朝倉書店  2012.9  ( ISBN:978-4-254-16057-4

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    Total pages:500   Language:Japanese Book type:Dictionary, encyclopedia

  3. 地球化学講座 8、地球化学実験法 Reviewed

    日高 洋( Role: Contributor ,  二次イオン質量分析(SIMS))

    培風館  2010.7  ( ISBN:978-4-563-04908-9

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    Total pages:332   Language:Japanese Book type:Textbook, survey, introduction

  4. 機器分析の事典 日本分析化学会編 Reviewed

    日高 洋( Role: Contributor)

    朝倉書店  2005.11  ( ISBN:978-4-254-14069-9

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    Total pages:360   Language:Japanese Book type:Dictionary, encyclopedia

MISC 56

  1. Samarium isotopic compositions of lunar meteorites Invited International coauthorship

    H. Hidaka, K. Nishiizumi, M. Caffee and S. Yoneda

    Meteoritics & Planetary Science   Vol. 54   page: A157 - A157   2019.6

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

  2. Isotopic variations of Sm, Gd, Dy Er and Yb induced from the neutron capture reactions on the Moon Invited

    H. Hidaka and S. Yoneda

    Meteoritics & Planetary Science   Vol. 53   page: A103 - A103   2018.7

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

  3. Systematic REE Isotopic Studies of Eucrites

    H. Hidaka, S. Yoneda

    METEORITICS & PLANETARY SCIENCE   Vol. 52   page: A141 - A141   2017.8

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    Language:English   Publishing type:Research paper, summary (international conference)   Publisher:WILEY  

    Web of Science

  4. 精密同位体分析のための標準物質 Invited Reviewed

    日高 洋

    ぶんせき   ( 11 ) page: 468 - 474   2016.11

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (other)  

  5. RB-SR AND CS-BA SYSTEMATICS OF EUCRITES

    H. Hidaka, S. Yoneda

    METEORITICS & PLANETARY SCIENCE   Vol. 51   page: A329 - A329   2016.8

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    Language:English   Publishing type:Research paper, summary (international conference)   Publisher:WILEY-BLACKWELL  

    Web of Science

  6. FORMATION MECHANISM OF ZIRCONS IN MESOSIDERITES.

    M. K. Haba, A. Yamaguchi, H. Hidaka

    METEORITICS & PLANETARY SCIENCE   Vol. 50   2015.8

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    Language:English   Publishing type:Research paper, summary (international conference)   Publisher:WILEY-BLACKWELL  

    Web of Science

  7. SYSTEMATIC ISOTOPIC VARIATIONS OF STRONTIUM, BARIUM AND REE OF SURFICIAL LUNAR SOILS

    H. Hidaka, S. Yoneda

    METEORITICS & PLANETARY SCIENCE   Vol. 50   2015.8

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    Language:English   Publishing type:Research paper, summary (international conference)   Publisher:WILEY-BLACKWELL  

    Web of Science

  8. Barium isotopic variations due to space weathering processes observed in lunar surficial soils Invited

    H. Hidaka and S. Yoneda

    Meteoritics & Planetary Science   Vol. 49   page: A166 - A166   2014.9

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

  9. Isotopic studies of radiogenic and neutron-captured REE of lunar meteorites Invited

    H. Hidaka and S. Yoneda

    Meteoritics & Planetary Science   Vol. 48   page: A161 - A161   2013.7

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

  10. イトカワの宇宙風化における太陽風照射の重要性について Invited Reviewed

    野口高明、木村 眞、岡崎隆司、日高 洋

    日本惑星科学会誌   Vol. 22   page: 78 - 85   2013

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)  

  11. Heterogeneous neutron capture record of the Norton County enstatite achondrite Invited

    H. Hidaka and S. Yoneda

    Meteoritics & Planetary Science   Vol. 47   page: A183 - A183   2012.8

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

  12. Special features of the new thermal ionization mass spectrometer installed at the National Museum and Nature and Science Reviewed

    S. Yoneda, H. Hidaka, S. Machida, T. Yokoyama, K. Misawa, S. Sasaki and N. Kanazawa

    Bulletin of the National Museum of Nature and Science E   Vol. 35   page: 1 - 6   2012

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    Language:English   Publishing type:Article, review, commentary, editorial, etc. (bulletin of university, research institution)  

  13. オクロ天然原子炉についての基礎知識と最近の同位体研究の進歩 Invited Reviewed

    日高 洋

      Vol. 61   page: 331 - 341   2012

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)  

  14. Neutron capture records of mesosiderites Invited

    H. Hidaka and S. Yoneda

    Meteoritics & Planetary Science   Vol. 46   page: A96 - A96   2011.7

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

  15. SHRIMP dating of detrital zircons from the Sangun-Renge Belt of Sangun metamorphic rocks, northern Kyushu, southwest Japan Reviewed

    Y. Tsusumi, K. Yokoyama, K. Terada and H. Hidaka

    Bulletin of the National Museum of Nature and Science C   Vol. 37   page: 5 - 16   2011

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    Authorship:Last author   Language:English   Publishing type:Rapid communication, short report, research note, etc. (bulletin of university, research institution)  

  16. SHRIMP U-Pb zircon geochronology of the orthogneiss and paragneiss in the eastern central range, Taiwan Reviewed International coauthorship

    Y. Tsustumi, K. Yokoyama, J.J.-Shen, K. Horie, K. Terada, H. Hidaka and C.-S. Lee

    Bulletin of the National Museum of Nature and Science C   Vol. 37   page: 17 - 27   2011

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    Language:English   Publishing type:Rapid communication, short report, research note, etc. (bulletin of university, research institution)  

  17. A neutron capture study of the Jilin chondrite Invited

    H. Hidaka and S. Yoneda

    Meteoritics & Planetary Science   Vol. 45   page: A81 - A81   2010.7

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  18. Cosmic-ray exposure histories of gas-rich brecciated meteorites Invited

    H. Hidaka and S. Yoneda

    Meteoritics & Planetary Science   Vol. 44   page: A90 - A90   2010.1

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  19. 20 億年前の原子炉(オクロ現象)と同位体化学 Invited Reviewed

    日高 洋

    化学と教育   Vol. 58   page: 456 - 457   2010

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)  

  20. 天然における核反応現象に基づく地球科学及び宇宙化学的研究 Invited Reviewed

    日高 洋

    放射化学会ニュース   Vol. 19   page: 16 - 18   2009

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (other)  

  21. Barium isotopic composition of chondrules in the Sayama meteorite Invited

    H. Hidaka and S. Yoneda

    Meteoritics & Planetary Science   Vol. 43   page: A56 - A56   2008.7

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

  22. オクロ現象研究の最近の話題から Invited Reviewed

    日高 洋

    放射化学会ニュース   Vol. 18   page: 1 - 6   2008

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  23. Irradiation records of gas-rich or brecciated meteorites studied from Sm and Gd isotopic shifts by neutron capture reactions Invited International coauthorship

    H. Hidaka, R. Bartoschewitz and S. Yoneda

    Meteoritics & Planetary Science   Vol. 42   page: A66 - A66   2007.8

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

  24. Neodymium, samarium, and gadolinium isotopic studies of lunar meteorites Dhofar 489 and NWA 032 Invited

    H. Hidaka and S. Yoneda

    Meteoritics & Planetary Science   Vol. 41   page: A76 - A76   2006.8

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  25. Barium isotopic compositions of chemical separates in carbonaceous chondrites Invited

    H. Hidaka and S. Yoneda

    Meteoritics & Planetary Science   Vol. 40   page: A66 - A66   2005.8

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  26. アボガドロ数はどこまで正確に求められているか Invited Reviewed

    日高 洋

    ぶんせき   ( 2 ) page: 72 - 76   2005.2

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  27. 極めて長い半減期をもつ同位体の科学 Invited Reviewed

    日高 洋

    化学と教育   Vol. 53   page: 140 - 141   2005

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)  

  28. 元素の原子量・原子質量・同位体存在度 Reviewed

    長尾敬介、角野浩史、米田成一、日高洋、海老原充

      Vol. 52   page: 233 - 256   2004

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)  

  29. Regolith history on the aubrite parent body Invited International coauthorship

    H. Hidaka, S. Yoneda and K. Marti

    Meteoritics & Planetary Science   Vol. 38   page: A60 - A60   2003.7

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

  30. 同位体比を用いた分析:重元素の同位体比(年代測定を中心として) Invited Reviewed

    日高 洋

    ぶんせき   ( 6 ) page: 290 - 295   2002.6

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (other)  

  31. U-Pb and REE characterization of lunar agglutinates: origin and depositional history of lunar regolith Invited

    H. Hidaka

    Meteoritics & Planetary Science   Vol. 37   page: A63 - A63   2002.5

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

  32. 同位体比を用いた分析:同位体比の定義と標準 Invited Reviewed

    日高 洋、赤木 右

    ぶんせき   ( 1 ) page: 2 - 8   2002.1

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (other)  

  33. Neutron capture effects on Sm and Gd isotopes in Martian meteorites Invited International coauthorship

    H. Hidaka, S. Yoneda and K. Nishiizumi

    Meteoritics & Planetary Science   Vol. 36   page: A80 - A81   2001.9

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

  34. SIMSによる局所年代測定法 Invited Reviewed

    日高 洋

    ぶんせき   ( 1 ) page: 25 - 29   2001.1

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (other)  

  35. 素粒子の結合定数の時間変化とOklo現象 Invited Reviewed

    藤井保憲、岩本 昭、日高 洋

    日本物理学会誌   Vol. 55   page: 679 - 684   2000.9

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    Authorship:Last author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)  

  36. Isotopic evidence of live cesium-135 in the early solar system Invited International coauthorship

    H. Hidaka, Y. Ohta, S. Yoneda and J.R. DeLaeter

    Meteoritics & Planetary Science   Vol. 35   page: A72 - A73   2000.9

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

  37. Ion microprobe study of lead isotopic compositions and rare earth element abundances in recrystallized granulitic lunar rock 77017 Invited

    H. Hidaka and S. Shibata

    Meteoritics & Planetary Science   Vol. 34   page: A55 - A55   1999.7

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

  38. 20億年前の原子炉 Invited Reviewed

    日高 洋

    電気評論   Vol. 410   page: 18 - 22   1999

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)  

  39. Fractionation of Ru-Tc and REE in the Oklo and Bangombé natural reactors Invited

    H. Hidaka

    CEC Nuclear Science and Technology Series   Vol. 19137   page: 125 - 135   1999

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  40. The Oklo uranium ore as a natural fission reactor: Its isotopic characterization by mass spectrometric approaches Invited

    H. Hidaka

    Proceedings of the 8th ISMAS Symposium     page: 197 - 205   1999

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  41. The comparison of neutron energy spectrum obtained from samarium and gadolinium isotopic compositions Invited

    H. Hidaka, M. Ebihara and S. Yoneda

    Meteoritics & Planetary Science   Vol. 33   page: A67 - A67   1998.7

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

  42. Redistribution of fissiogenic and non-fissiogenic rare earth elements in and around natural fission reactors at Oklo and Bangombé, Gabon Invited

    H. Hidaka

    CEC Nuclear Science and Technology Series   Vol. 19116   page: 123 - 137   1998

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Article, review, commentary, editorial, etc. (international conference proceedings)  

  43. Samarium and gadolinium isotopic compositions of meteorites Invited

    H. Hidaka, M. Ebihara and S. Yoneda

    Meteoritics & Planetary Science   Vol. 32   page: A59 - A60   1997.7

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

  44. 中性子捕獲反応に基づく元素安定同位体組成の変動と宇宙・地球化学 Invited Reviewed

    日高 洋

    号外地球   Vol. 18   page: 176 - 180   1997

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)  

  45. 安定同位体から見た天然原子炉の地球化学的特徴と核化学的特性 Invited Reviewed

    日高 洋

      Vol. 46   page: 96 - 107   1997

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)  

  46. 高感度・高分解能イオンマイクロプローブ(SHRIMP)を用いた地球惑星科学 Invited Reviewed

    日高 洋、佐野有司

    地球化学   Vol. 31   page: 1 - 16   1997

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (scientific journal)  

  47. Isotopic shifts of Lu caused by neutron capture effects in Oklo and Bangombé reactor zones: Possible geo-thermometer for natural fission reactors Invited

    H. Hidaka

    CEC Nuclear Science and Technology Series   Vol. 18314   page: 201 - 205   1997

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Article, review, commentary, editorial, etc. (international conference proceedings)  

  48. Isotopic evidence for the retention of fissiogenic nuclides in and around reactor zones Invited

    H. Hidaka

    CEC Nuclear Science and Technology Series   Vol. 16704   page: 43 - 53   1996

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Article, review, commentary, editorial, etc. (international conference proceedings)  

  49. オクロ鉱床の天然原子炉内で生成された放射性核種の地球化学的挙動 Invited Reviewed

    日高 洋

      Vol. 45   page: 151 - 152   1996

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  50. An attempt of isotopic determination of natural radioactive nuclides, 53Mn and 230Th, by thermal ionization mass spectrometry Reviewed

    S. Yoneda, M. Shima, H. Hidaka and M. Ebihara

    Bulletin of the National Museum of Nature and Science E   Vol. 18   page: 1 - 8   1995

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    Language:English   Publishing type:Rapid communication, short report, research note, etc. (bulletin of university, research institution)  

  51. REE geochemistry of Oklo and Bangombé natural reactors Invited International coauthorship

    H. Hidaka and P. Holliger

    CEC Nuclear Science and Technology Series   Vol. 16098   page: 159 - 168   1995

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Article, review, commentary, editorial, etc. (international conference proceedings)  

  52. 太古代堆積岩の化学的特徴 Invited Reviewed

    海老原充、内野智功海、日高 洋、丸山茂徳

    号外地球   Vol. 10   page: 41 - 51   1994

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    Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media)  

  53. Precise determination of isotopic compositions for lanthanum, samarium, gadolinium, dysprosium, erbium, ytterbium and lutetium by thermal ionization mass spectrometry Reviewed

    M. Shima, H. Hidaka, D. Nakaya, K. Shinotsuka and M. Ebihara

    Bulletin of the National Museum of Nature and Science E   Vol. 17   page: 1 - 8   1994

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    Language:English   Publishing type:Rapid communication, short report, research note, etc. (bulletin of university, research institution)  

  54. いん石の無機成分の分析 Invited Reviewed

    日高 洋、海老原充

    ぶんせき   ( 5 ) page: 347 - 352   1993.5

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (other)  

  55. Geochemical behaviour of fissiogenic Rb, Sr, Cs and Ba in SF84 (zone 10) Invited International coauthorship

    H. Hidaka and P. Holliger

    CEC Nuclear Science and Technology Series   Vol. 14877   page: 177 - 185   1993

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  56. ナチュラル・アナログとしてのオクロ鉱床:同位体化学的アプローチ Invited Reviewed

    日高 洋、増田彰正

    地質ニュース   Vol. 448   page: 46 - 53   1991.12

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (other)  

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Presentations 26

  1. オクロ天然原子炉に関する最近の話題から

    日高 洋

    2020年度日本地球化学会第67回年会  2020.11.20  日本地球化学会

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    Event date: 2020.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン   Country:Japan  

  2. Determination of neutron energy spectra for lunar meteorites studied from REE isotopic compositions International coauthorship International conference

    H. Hidaka, K. Nishiizumi, M. Caffee, and S. Yoneda

    Goldschmidt Conference 2020  2020.6.23  Geochemical Society

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    Event date: 2020.6

    Language:English   Presentation type:Oral presentation (general)  

    Venue:on line  

  3. Nuclear reactions induced by cosmic-ray irradiations in space Invited International conference

    H. Hidaka

    2nd International Conference on Radiations and Applications  2019.10.28  The Algerian Atomic Energy Commission

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    Event date: 2019.10

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

    Venue:Algiers   Country:Algeria  

  4. オクロ天然原子炉の地球化学および同位体研究から示唆される核分裂起源放射性核種の地球表層における長期的挙動 Invited

    日高 洋

    日本地質学会第126年学術大会  2019.9.24  日本地質学会

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    Event date: 2019.9

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

    Venue:山口   Country:Japan  

  5. 月隕石の宇宙線照射履歴 International coauthorship

    日高 洋、西泉邦彦、米田成一

    2019年度日本地球化学会第66回年会  2019.9.19  日本地球化学会

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    Event date: 2019.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京   Country:Japan  

  6. Cosmic-ray exposure records of lunar meteorites studied from spallogenic and neutron-captured products International coauthorship International conference

    H. Hidaka, K. Nishiizumi, and S. Yoneda

    Goldschmidt Conference 2019  2019.8.20  Geochemical Society

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    Event date: 2019.8

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Barcelona   Country:Spain  

  7. Samarium isotopic compositions of lunar meteorites International coauthorship International conference

    H. Hidaka, K. Nishiizumi, M. Caffee, and S. Yoneda

    82nd Annual Meteoritical Society Meeting  2019.7.9  The Meteoritical Society

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    Event date: 2019.7

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Sapporo   Country:Japan  

  8. REE isotopic studies for cosmochemistry: Sm, Gd and Er isotopic variations by neutron capture reactions Invited International conference

    H. Hidaka

    Japan India Forum for Advanced Study 2019  2019.3.14  JSPS, DST

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    Event date: 2019.3

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

    Venue:Niigata   Country:Japan  

  9. REE isotopic studies for cosmochemistry: La isotopic variations by spallation reactions Invited International conference

    H. Hidaka

    Japan India Forum for Advanced Study 2019  2019.3.10  JSPS, DST

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    Event date: 2019.3

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

    Venue:Nagoya   Country:Japan  

  10. REE isotopic studies for cosmochemistry: A case study of La and Sm isotopes International conference

    H. Hidaka

    3rd Korea-Japan Joint Workshop on Isotope-Ratio Mass Spectrometry  2018.11.10  The Mass Spectrometry Society of Japan, The Geological Society of Korea, KIGAM

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    Event date: 2018.11

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Daejeon   Country:Korea, Republic of  

  11. 自然界で生じる核反応がもたらす元素同位体変動に基づく宇宙・地球化学的研究 Invited

    日高 洋

    2018年度日本地球化学会第65回年会  2018.9.12  日本地球化学会

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    Event date: 2018.9

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

    Venue:沖縄   Country:Japan  

  12. Neutron energy spectrum at the surface of the moon studied from the REE isotopic compositions International conference

    H. Hidaka, Y. Mizutani, and S. Yoneda

    Goldschmidt Conference 2018  2018.8.16  Geochemical Society

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    Event date: 2018.8

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Boston   Country:United States  

  13. Isotopic variations of Sm, Gd, Dy, Er and Yb induced from the neutron capture reactions on the Moon International conference

    H. Hidaka and S. Yoneda

    81st Annual Meteoritical Society Meeting  2018.7.26  The Meteoritical Society

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    Event date: 2018.7

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Moscow   Country:Russian Federation  

  14. 1980年代の地球化学の最前線研究を展開した研究室の一例 Invited

    日高 洋

    日本地球惑星科学連合2018年大会  2018.5.20  日本地球惑星科学連合

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    Event date: 2018.5

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

    Venue:千葉   Country:Japan  

  15. La-Ce chronometry of eucrites and diogenites International coauthorship International conference

    H. Hidaka, S. Yoneda, and S.-G. Lee

    49th Lunar and Planetary Science Conference 2018  2018.3.19  Lunar and Planetary Institute, NASA

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    Event date: 2018.3

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Houston   Country:United States  

  16. Cosmic-ray exposure histories of eucrites studied from Sm and Gd isotopic compositions International conference

    Hiroshi Hidaka, Shigekazu Yoneda

    8th Symposium on Polar Science 

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    Event date: 2017.12

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Tachikawa, Tokyo   Country:Japan  

    Previous studies of cosmic-ray exposure (CRE) ages for HED meteorites show the existence of two major clusters of the CRE ages around 20-25 Ma and 35-42 Ma and of other three minor clusters around 6-7 Ma, 10-12 Ma, and 14 Ma (Eugster and Michel, 1995; Welten et al., 1997). Our concern is whether the Sm and Gd isotopic shifts of eucrites also show the consistent trend with the CRE age clusters. 149Sm and 157Gd have very large thermal neutron capture cross sections, and change thier isotopic abundances by 149Sm(n,γ)150Sm and 157Gd(n,γ)158Gd reactions, respectively, induced from cosmic-ray irradiation. Providing that the CRE information from the Sm and Gd isotopic shifts are different from the 81Kr-Kr data, there is a possibility that the inconsistency of the CRE information occurred by the pre-irradiation on the eucritic parent body. In this study, eight basaltic eucrites were used.

  17. Isotopic characterization for nuclear reactions in the Oklo natural reactors International conference

    Hiroshi Hidaka, Salahendric Bentridi, Benoit Gall, N. Amrani

    International Conference on Radiations and Applications 

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    Event date: 2017.11

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

    Venue:Houari Boumediene University of Science and Technology   Country:Algeria  

    The Oklo uranium ore in the Francevillian basin at the east part of the Republic of Gabon is known as a fossil of natural fission reactors, because large-scaled fission chain reactions spontaneously occurred in the ore two billion years ago. It is of major concern to characterize the properties of nuclear reactors and to investigate the behavior of fission products in and around the Oklo natural reactors. In this review, geological and physico-chemical characteristics of the Oklo natural fission reactor and its implication for radioactive waste disposal are shown.

  18. Redistribution behavior of REE into constituent minerals of eucrites and its implication for the genesis Invited International conference

    Hiroshi Hidaka, Tsuyoshi Ohnishi

    2nd Korea-Japan Joint SHRIMP Workshop 

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    Event date: 2017.10

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

    Venue:KBSI Ochang Center   Country:Korea, Republic of  

    As a simple model, most eucrites are interpreted as primary partial melt products from primitive, metal-free, chondritic material (Stolper, 1977). However, assuming a simple differentiation of two components, eucrite and diogenite, originated from chondritic materials, it is difficult to explain the mass balance of REE among eucrites, diogenites and chondrites, because the chondritic REE pattern cannot be reconstructed only from the mixing of REE components from eucrites and diogenites. As a result of REE measurements of whole rock analysis, most of basaltic eucrites show flatter REE patterns with negative or positive Eu anomaly, and their REE contents are 8-10 times higher than those in chondrites. On the other hand, diogenites generally have significant depletion of lighter REE in the patterns. In this study, REE abundances were measured in single minerals of eucrites in order to study REE distribution behavior in eucritic materials in association with gechemical differentiation from chondritic materials.

  19. REE isotopic study for cosmochemistry: A case study of La and Sm isotopes Invited International conference

    Hiroshi Hidaka

    5th International Conference on Analytical Science & Technology 

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    Event date: 2017.10

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

    Venue:KBSI Ochang Center   Country:Korea, Republic of  

    The data of a series of the elemental abundances of rare earth elements (REE) in planetary materials (REE abundance pattern) have been widely used to understand the geochemical evolution processes of the materials since the pioneering work, because REE have several similarities of physicochemical properties due to their electron configurations of the atomic structures. Furthermore, isotopic compositions of some REE are variable, because they include radiogenic components derived from 138La-138Ce, 146Sm-142Nd, and 147Sm-143Nd decay systems and nucleogenic components like neutron captured products by 149Sm(n,γ)150Sm and 157Gd(n,γ)158Gd due to cosmic-ray irradiation. Here in this talk, I would like to introduce my recent work on La and Sm isotopic study and its application as one of examples for the REE isotopic studies in cosmochemical fields.

  20. 太陽宇宙線初期照射説のの同位体化学的検証:Allende隕石のCAI中のLa同位体比測定

    日高洋、米田成一

    2017年度日本地球化学会第64回年会 

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    Event date: 2017.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東京工業大学、東京   Country:Japan  

    核破砕反応によって生成される138La を太陽宇宙線初期照射履歴のためのプロキシとする試みがなされているが、その精密同位体測定例は少ない。本研究では 、Allende 隕石から採取した2つのCAI粒子を酸分解し、所定のイオン交換法によりLaを化学分離し、表面電離型質量分析計により、その精密同位体測定を行った。

  21. Isotopic evidence for intensive activity of young Sun from REE isotopic compositions in CAIs International conference

    Hiroshi Hidaka, Shigekazu Yoneda

    Goldschidt Conference 2017 

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    Event date: 2017.8

    Language:English   Presentation type:Oral presentation (general)  

    Country:France  

    Isotopic measurements of excess 10B decayed from 10Be in CAIs and astronomical observations of intensive X-ray emissions from stellar analogues of the young Sun suggest a possibility of intensive irradiation by the young Sun. However, the model for early solar irradiation from young Sun is somehow model-depending and still plausible. For further quantitative discussion about the early solar irradiation models, 138La is one of adequate isotopic tracers as one of refractory and spallogenic products caused by solar irradiation. The presence of excess 138La as a spallogenic product may provide isotopic constraints on the early solar irradiation models. In this study, isotopic analyses mainly of La and other REE like Ce, Nd, and Sm in CAIs collected from the Allende CV3 meteorite were performed to understand the spallogenic reactions in the early solar system.

  22. Systematic REE isotopic studies of eucrites International conference

    Hiroshi Hidaka, Shigekazu Yoneda

    80th Annual Meeting of the Meteoritical Society 

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    Event date: 2017.7

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Santa Fe, New Mexico   Country:United States  

    Most eucrites have basaltic composition and several of them represent lavas or shallow intrusions from a differen-tiated parent body, possibly asteroid 4 Vesta. Many isotopic studies have been conducted using long- and short lived geochronometers to understand accretion, core formation, mantle differentiation, and the formation of prima-ry basalts on the eucritic parent body (EPB). In our previous study, Sr and Ba isotopic analyses were applied mainly for chronometric purposes of eight basaltic eucrites, but Rb-Sr and Cs-Ba decay systems did not provide any chronological information because of the significant contamination of terrestrial Sr and Ba found in five DaG de-sert eucrites. In this study, Ce, Nd, Sm and Gd isotopic compositions of the eight eucrites were further deter-mined for better understanding of differentiation on the parent body.

  23. REE isotopic study for cosmochemistry: A case study of La isotopes Invited International conference

    Hiroshi Hidaka

    KIGAM seminar 

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    Event date: 2017.6

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

    Venue:Daejeon, Korea   Country:Korea, Republic of  

    The data of a series of REE elemental abundances in planetary materials (REE abundance pattern) have been widely used to understand the geochemical evolution processes of the materials since the proposal of pioneering work by Masuda and Matsui (1966), because REE have several similarities of physicochemical properties due to their electron configurations of the atomic structures. Furthermore, isotopic compositions of some REE are variable, because they include radiogenic components derived from 138La-138Ce, 146Sm-142Nd, and 147Sm-143Nd decay systems and nucleogenic components like neutron captured products by 149Sm(n,γ)150Sm and 157Gd(n,γ)158Gd due to cosmic-ray irradiation. In particular, the isotopic variations of REE provide chronological and astrophysical information for cosmochemistry. Here in this talk, I would like to introduce my recent work on La isotopic study and its application as one of examples for the REE isotopic studies in cosmochemical fields.

  24. 地球上での汚染が認められる砂漠産ユークライト隕石のRb-Sr壊変系

    日高 洋、世羅浩平、米田成一

    2016年度日本地球化学会第64回年会  2016.9.15  日本地球化学会

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    Event date: 2016.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:大阪   Country:Japan  

  25. Rb-Sr and Cs-Ba systematics of eucrites International conference

    H. Hidaka and S. Yoneda

    79th Annual Meteoritical Society Meeting  2016.8.12  The Meteoritical Society

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    Event date: 2016.8

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Berlin   Country:Germany  

  26. Cosmic-ray exposure histories of lunar meteorites International coauthorship International conference

    H. Hidaka, K. Nishiizumi, and S. Yoneda

    Goldschmidt Conference 2016  2016.6.29  Geochemical Society

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    Event date: 2016.6 - 2016.7

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Yokohama   Country:Japan  

▼display all

Works 32

  1. Geochronological correlation of Japan and Korea

    2004

  2. 日本と韓国の地質年代学的相関

    2004

  3. The evolution of planetary materials and the origin of meteorites studied from multi-analyses of cosmogenic nuclides

    2002

  4. 宇宙線生成核種の多変量解析による惑星物質の進化と隕石の起源について(継続)

    2002

  5. Study on migration mechanism of radionuclides by geochemical approaches

    2001

  6. 宇宙線生成核種の多変量解析による惑星物質の進化と隕石の起源について

    2001

  7. 宇宙線生成核種の多変量解析による惑星物質の進化と隕石の起源について

    2001

  8. 地球化学的アプローチによる放射性核種の移行メカニズムの解明研究

    2001

  9. 地球化学的アプローチによる放射性核種の移行メカニズムの解明研究

    2001

  10. The evolution of planetary materials and the origin of meteorites studied from multi-analyses of cosmogenic nuclides

    2001

  11. The evolution of planetary materials and the origin of meteorites studied from multi-analyses of cosmogenic nuclides

    2001

  12. Study on migration mechanism of radionuclides by geochemical approaches

    2001

  13. Geochemical study of Oklo natural fission reactors to understand the behavior of fission products

    1999

  14. 同位体精密測定を用いた地球化学的アプローチによる二重ベータ崩壊生成物の検出とその壊変定数の見積もりに関する研究

    1999

  15. 同位体精密測定を用いた地球化学的アプローチによる二重ベータ崩壊生成物の検出とその壊変定数の見積もりに関する研究

    1999

  16. Study on detection of double beta decay products and estimation of their decay constants from geochemical approaches using precise isotopic measurements

    1999

  17. Study on detection of double beta decay products and estimation of their decay constants from geochemical approaches using precise isotopic measurements

    1999

  18. Geochemical study of Oklo natural fission reactors to understand the behavior of fission products

    1999

  19. 核分裂生成物の移行挙動解明のためのオクロ天然原子炉の地球化学的研究(継続)

    1999

  20. 核分裂生成物の移行挙動解明のためのオクロ天然原子炉の地球化学的研究(継続)

    1999

  21. Geochemical study of Oklo natural fission reactors to understand the behavior of fission products

    1998

  22. 核分裂生成物の移行挙動解明のためのオクロ天然原子炉の地球化学的研究

    1998

  23. 核分裂生成物の移行挙動解明のためのオクロ天然原子炉の地球化学的研究

    1998

  24. Geochemical study of Oklo natural fission reactors to understand the behavior of fission products

    1998

  25. Natural analogue study of the Oklo uranium ore

    1996

  26. オクロにおけるナチュラルアナログ研究

    1996

  27. オクロにおけるナチュラルアナログ研究

    1996

  28. Natural analogue study of the Oklo uranium ore

    1996

  29. Precise isotopic measurements of geochemical samples by mass spectrometry

    1993

  30. 質量分析による地球化学的試料の精密同位体比測定

    1993

  31. Quantitative Analyses of Ga and Al in Ga<SUB>1-x</SUB>Al<SUB>x</SUB>As by SIMS

    1987

  32. 二次イオン質量分析(SIMS)によるGa<SUB>1-x</SUB>Al<SUB>x</SUB>As中のGa,Alの定量分析

    1987

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

  1. インド半島の始生代から現在に至る地殻進化を紐解く地球化学・年代学・地質学的アプローチ International coauthorship

    2018.4 - 2019.3

    アジア学術セミナー 

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\7611000 ( Direct Cost: \6919000 、 Indirect Cost:\692000 )

  2. Research and Development on Geochemical Proxies of Isotope and Trace Element for Understanding of Earth and Universe Evolution Processes International coauthorship

    2017.4 - 2020.3

    Seung-Gu Lee

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    Authorship:Principal investigator  Grant type:Other

    Grant amount:\8181600 ( Direct Cost: \8181600 )

    Our goals of this research project are, first of all, establishment of chemical separation of mutual REE with high recovery for isotopic study and their application for chronological and isotopic works of cosmo- and geochemical materials to understand the formation and evolution processes of solar system and earth

  3. REE isotope cosmochemistry of differentiated solar planetary materials (HED meteorites) International coauthorship

    Grant number:17032211-000352  2017.4 - 2019.3

    Hiroshi Hidaka

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    Grant type:Competitive

    Grant amount:\2304000 ( Direct Cost: \2304000 )

  4. 地質年代学から捉えるインドWestern Dharwar Craton南境界におけるテクトニクス進化 International coauthorship

    Grant number:BR160601  2016.8 - 2016.10

    外国人研究者再招へい事業 

    サンカ―・ボーズ

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\675000 ( Direct Cost: \675000 )

  5. インドの大学との交流 International coauthorship

    Grant number:E20150226015  2015

    日本・アジア青少年サイエンス交流事業  さくらサイエンスプランBコース(共同研究活動コース)

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\2579605 ( Direct Cost: \2579605 )

  6. Archean craton-margin orogenic events and SHRIMP age dating:geodynamic significance of India during Ur and Columbia supercontinents International coauthorship

    Grant number:14039221-000104  2014.6 - 2016.3

    Hiroshi Hidaka

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\2000000 ( Direct Cost: \2000000 )

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KAKENHI (Grants-in-Aid for Scientific Research) 25

  1. 極微小領域質量分析から探る地球のストロンチウム同位体進化の解明

    Grant number:21H01182  2021.4 - 2025.3

    外田 智千, 堀江 憲路, 日高 洋, 三宅 亮, M Satish‐Kumar

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    Authorship:Coinvestigator(s) 

    地球惑星が形成して以降の地殻とマントルの活動と進化をストロンチウム同位体を鍵として解明に取り組む。その目的のために、微量元素同位体研究において重要な2つの副成分鉱物アパタイトとジルコンの同位体データを、1)イオンマイクロプローブを用いた微細なアパタイト結晶の同位体分析、2)アパタイト、および、それを包有するジルコンのU-Pb年代、酸素・ネオジム・ストロンチウム同位体分析、3)透過電子顕微鏡を用いた結晶内部及び結晶粒界の解析、それらを統合することにより明らかにする。

  2. Searcg for the signatures of solar super-flare in lunar regolith grains

    Grant number:17K18807  2017.6 - 2021.3

    Grant-in-Aid for Challenging Research (Exploratory)

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    Grant amount:\520000 ( Direct Cost: \400000 、 Indirect Cost:\120000 )

  3. ジルコンの多種同位体分析による地殻形成プロセスの解明

    Grant number:17H02976  2017.4 - 2021.3

    日本学術振興会  科学研究費  基盤研究B

    外田 智千

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    Grant amount:\520000 ( Direct Cost: \400000 、 Indirect Cost:\120000 )

    多種同位体分析のための二次イオン質量分析計の調整と基礎実験を続けた。南極大陸に岩石試料、特に第58次南極観測隊(2017-2018年)で採取された昭和基地周辺(リュツォ・ホルム岩体)からエンダビーランド(西レイナー岩体、レイナー岩体、ナピア岩体)岩石試料の解析を進めた。リュツォ・ホルム岩体からこれまでに公表されている年代データをコンパイルして、地質ユニット区分の再検討をおこなった。また、ナピア岩体Harvey Nunatakから採取された斜方輝石片麻岩中のジルコンが、リチウムやウランに極端に富むことを見出し、その成因を解明すべくSHRIMPによる高精度酸素同位体分析を行った。高リチウム含有量のジルコンのリチウム同位体分析法を確立し、比較的大きな同位体分別が生じていることが明らかとなった。
    また、飛騨帯神岡地域をテストケースとして、ジルコン多種同位体分析手法の迅速化を行い、南極試料への適用準備を進めた。
    上記以外の様々な地質試料を対象としてジルコンのU-Pb年代、酸素同位体分析を重点的にすすめて、多種同位体地球化学データを用いた太古代から原生代にかけての地殻進化過程の検討をおこなうとともに、SHRIMPを用いた微小領域ストロンチウム同位体分析手法の開発をすすめた。
    得られた成果を、JpGU Meeting 2019、International Symposium of Antarctic Earth Sciences、International Goldschmidt Conference、日本鉱物科学会、日本地質学会、International Conference on Gondwana to Asia、極域科学シンポジウム等で発表した。
    平成30年度は、研究遂行の基幹となる二次イオン質量分析が、機器の故障や予測していたよりも分析精度が上がらなかったために、平成30年度補助金の一部を平成31年/令和元年度に繰り越して、研究計画の推進と並行して二次イオン質量分析計の真空系の改修を実施し、必要な分析精度・確度を得るための調整をおこなうことになったため。
    研究遂行の基幹となる二次イオン質量分析装置の精度を上げるために必要な試験を実施し、分析精度・確度の保証を得る。その上で、昨年度に引き続き多種同位体分析のための基礎解析と分析試料調整をおこなう。
    南極大陸に産する太古代、原生代、古生代初期の各変成岩試料を対象として、U-Pb年代測定、希土類元素分析、微量元素存在度分析、高精度酸素-リチウム同位体分析に加えて、Hf同位体分析、ならびに表面電離型質量分析計を用いたジルコンのNd同位体分析を実施する。酸素同位体と水酸基イオンの同時分析手法を確立する。得られたデータを検証し、希土類元素データや水酸基の定量情報による後からのイベントによる改変の影響評価、酸素同位体分析データによる年代値のフィルタリングなど、年代値とイベントを照合するための総合的な解析をおこない、一連の手法を確立する。
    成果をとりまとめて、国際学会等で発表し、学術論文として公表する。

  4. Determination of the initial abundance of presently extinct nuclide Cs-135 in the early solar system and its chronometrical applications

    Grant number:16K13915  2016.4 - 2019.3

    Hidaka Hiroshi

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\3510000 ( Direct Cost: \2700000 、 Indirect Cost:\810000 )

    The aqueous alteration is one of the primitive activities on the early solar planetary bodies. In this study, precise determination of Ba isotopic compositions for the chemical separates with stepwise acid leaching technique were performed on five carbonaceous chondrites. As the isotopic results, it is concluded that several kinds of nucleosynthetic components out of the solar system were added heterogeneously in the meteorite parent bodies, and that these additional nucleosynthetic components interfere the existence of radiogenic Ba-135 decayed from Cs-135. Additionally, in-situ Ba isotopic analyses by using an ion micro probe were performed on individual minerals of one of five samples, the Tagish Lake meteorite. No isotopic evidence for the radiogenic Ba-135 was found in the individual minerals.

  5. Estimation of the existence period of water in the early solar system by the precise barium isotopic ratio measurements of meteorites

    Grant number:15K05356  2015.4 - 2018.3

    Yoneda Shigekazu

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    Evidence of the existence of water in the early solar system remains in meteorites. In this study, the isotopic ratios of barium in meteorites were precisely measured, and the age determination was examined by detecting the isotopic anomalies of Ba-135 due to the extinct nuclide Cs-135. About 10-40 ppm isotopic measurement accuracy was obtained with the standard solution, and the double spike method was studied using the Ba-130 and other concentrated isotopes. In Tagish Lake carbonaceous chondrites, significant isotopic anomalies were observed in Ba-135 and Ba-137. These are thought to be brought to the primitive solar nebula with presolar grains and are retained heterogeneously in meteorites. No correlation was found between the Cs/Ba ratio and the isotopic excess, hence it is presumed that cesium migrated due to the water at the early metamorphic process.

  6. Progress of REE isotopic studies on cosmochemistry

    Grant number:26247095  2014.4 - 2017.3

    HIDAKA HIROSHI

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\42510000 ( Direct Cost: \32700000 、 Indirect Cost:\9810000 )

    The chemical technique for mutual separation of rare earth elements (REEs) was developed, and was applied for isotopic studies of cosmocheimcal materials. Among a series of eucrites that are considered to have been differentiated in the early solar system, dessert eucrites showed significant effect of terrestrial contamination, and their Rb-Sr system were largely disturbed. On the other hand, the Sm-Nd system of a series of eucrites showed less effect of the terrestrial contamination, and provided chronological information on the early differentiation in the solar system. All five kinds of luna surficial materials collected by the Apollo mission showed isotopic excesses of lighter isotopes having proton-rich nuclides and heavier isotopes having neutron-rich nuclides of some REE caused by neutron capture and spallation reactions due to long-term exposure by cosmic rays.

  7. Reaction on the surface of air-less bodies: Detailed analyses of Itokawa grains and new progress of space weathering study

    Grant number:24244088  2012.4 - 2017.3

    Noguchi Takaaki

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    Grains recovered from Asteroid Itokawa by Hayabusa spacecraft have a thin layer (space weathering rim) on the top, which has different structure and chemical composition from those of the interior. The rims were formed mainly by solar wind irradiation. In this study, we investigated formation rates of the space weathering rims, dwell times at different depth in the regolith layer of Itokawa, and thermal and shock history of each grain by a combination of scanning and transmission electron microscopy and noble gas mass spectrometry. We also performed low-energy ion irradiation onto LL chondrites, which simulated solar wind irradiation of Itokawa. These experiments also served to estimate irradiation history of each Itokawa grain. We applied the same combination of investigations to lunar regolith grains. We also performed low-energy iron irradiation onto CM chondrite, which would simulate space weathering of Asteroid Ryugu.

  8. 始原的隕石の超精密安定同位体分析による初期太陽系物質の起源と進化プロセスの解明

    Grant number:24340137  2012.4 - 2015.3

    基盤研究B

  9. ナノビーム分析技術を駆使したダイヤモンドの新成因に係わる物質科学的検証

    Grant number:23654192  2011.4 - 2013.3

    挑戦的萌芽研究

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    Authorship:Principal investigator 

    Grant amount:\3770000 ( Direct Cost: \2900000 、 Indirect Cost:\870000 )

  10. 素粒子物理学との境界で展開される同位体地球化学

    Grant number:21244086  2009.4 - 2012.3

    基盤研究A

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\45760000 ( Direct Cost: \35200000 、 Indirect Cost:\10560000 )

  11. 消滅核種および年代学的研究による太陽系初期におけるアルカリ金属元素の挙動の解明

    Grant number:19540516  2007.4 - 2010.3

    基盤研究C

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    Authorship:Coinvestigator(s) 

  12. 安定同位体をプローブとした新しい比較惑星科学の構築

    Grant number:17204051  2005.4 - 2009.3

    基盤研究A

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    Authorship:Principal investigator 

    Grant amount:\49660000 ( Direct Cost: \38200000 、 Indirect Cost:\11460000 )

  13. 隕石母天体深部におけるオリビン高圧相の存在の検証

    Grant number:16540438  2004.4 - 2006.3

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    Authorship:Coinvestigator(s) 

  14. ジルコンの局所同位体分析に基づくアラビア・ヌビア盾状地南部の熱史と進化

    Grant number:04F04071  2004.4 - 2006.3

    特別研究員奨励費

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    Grant amount:\2400000 ( Direct Cost: \2400000 )

  15. 精密同位体比測定による隕石中の消滅核種の検出と太陽系初期年代学への応用

    Grant number:15340194  2003.4 - 2006.3

    基盤研究B

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    Authorship:Coinvestigator(s) 

  16. 同位体化学的アプローチによる二重ベータ崩壊半減期決定

    Grant number:14654098  2002.4 - 2005.3

    萌芽研究

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    Grant amount:\3300000 ( Direct Cost: \3300000 )

  17. 宇宙線生成核種の多変量解析による惑星物質の進化と隕石の起源について

    Grant number:13440167  2001.4 - 2004.4

    基盤研究B

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    Authorship:Principal investigator 

    Grant amount:\13100000 ( Direct Cost: \13100000 )

  18. 月試料の被照射中性子フラックスのエネルギースペクトル決定と隕石学への応用

    Grant number:10640476  1998.4 - 2000.3

    基盤研究C

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    Authorship:Principal investigator 

    Grant amount:\3900000 ( Direct Cost: \3900000 )

  19. ナノモル量の窒素同位体地球惑星化学

    Grant number:08404036  1996.4 - 1999.3

    基盤研究A

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    Authorship:Coinvestigator(s) 

  20. 宇宙線と惑星物質との相互作用がいくつかの元素の安定同位体存在度に及ぼす効果

    Grant number:08640623  1996.4 - 1997.3

    基盤研究C

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    Authorship:Principal investigator 

    Grant amount:\2200000 ( Direct Cost: \2200000 )

  21. 隕石中の希土類元素のシステマティックな同位体組成変動と太陽系内の核的事象との関連

    Grant number:07640659  1995.4 - 1996.3

    基盤研究C

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    Authorship:Principal investigator 

    Grant amount:\2200000 ( Direct Cost: \2200000 )

  22. ウランの精密同位体比分析に基づく消滅核種247Cmの原始太陽系存在度

    Grant number:06640637  1994.4 - 1995.3

    基盤研究C

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\2000000 ( Direct Cost: \2000000 )

  23. マグマの発生する場での高揮発性元素の挙動に関する研究

    Grant number:06222224  1994.4 - 1995.3

    重点領域研究

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    Grant amount:\1500000 ( Direct Cost: \1500000 )

  24. 地球化学的アプローチによるウラン鉱床のキャラクタリゼーション

    Grant number:05740341  1993.4 - 1994.3

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\1000000 ( Direct Cost: \1000000 )

  25. ナチュラルアナログとしてのオクロウラン鉱床の同位体化学的研究

    Grant number:04854055  1992.4 - 1993.3

    奨励研究A

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\900000 ( Direct Cost: \900000 )

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Teaching Experience (On-campus) 10

  1. Earth and Planetary Chemistry II

    2020

  2. Earth and Planetary Chemistry I

    2020

  3. Inorganic Geochemistry

    2020

  4. 地球惑星科学の最前線

    2020

     詳細を見る

    地球惑星科学は太陽系の起源・進化および地球・惑星の内部と表層の諸現象を研究対象としており、その対象領域は
    極めて広いため、広範な知識に基づく理解や考察が求められる。初年次教育として地球惑星科学分野の基礎を学ぶた
    めに、本講義では地球惑星科学の概観を学びつつ、最新の研究成果や課題の学習を通して地球の特徴や歴史に関する
    新たな見方を理解・考察することを目的とする。また、地球環境問題や自然災害などに対して、広い視野から考察し
    、論述できるようになるとともに、深い考察力を涵養することを目指す。

  5. 地球化学分析法I及び実験

    2020

  6. Fundamentals of Earth Science I

    2020

  7. 地球化学分析法II及び実験

    2020

  8. 無機化学特論

    2017

  9. 地球科学入門

    2017

  10. 地球惑星化学II

    2017

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Teaching Experience (Off-campus) 6

  1. Systematic REE isotopic studies for cosmochemistry

    2019.12 Tianjin University)

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    Level:Postgraduate  Country:China

  2. Nuclear reactions induced by cosmic-ray irradiation in space

    2019.6 University of Strasbourg)

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    Level:Postgraduate  Country:France

  3. Isotopic characterization for nuclear reactions in the Oklo natural reactors

    2019.6 University of Grenoble-Alpes)

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    Level:Postgraduate  Country:France

  4. 希土類元素の同位体宇宙化学

    2018.8 Kyushu University)

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    Level:Postgraduate 

  5. Nucleochemical characteristics of the Oklo natural reactors studied from isotopic analyses

    2016.11 University of Sciences and Technology Houari Boumediene)

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    Level:Postgraduate  Country:Algeria

  6. 放射線と自然科学

    2016 Hiroshima University)

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    Level:Undergraduate (liberal arts) 

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Academic Activities 1

  1. 特別セッション 地球史・人類史の年代測定

    Role(s):Planning, management, etc., Panel moderator, session chair, etc.

    日本地球化学会年会  2020.11

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    Type:Academic society, research group, etc.