Updated on 2022/04/21

写真a

 
KOUKETSU Yui
 
Organization
Graduate School of Environmental Studies Department of Earth and Environmental Sciences Geology and Geobiology Lecturer
Graduate School
Graduate School of Environmental Studies
Undergraduate School
School of Science Department of Earth and Planetary Science
Title
Lecturer

Degree 1

  1. Doctor (Science) ( 2013.3   Nagoya University ) 

Research Interests 5

  1. Petrology

  2. Spectroscopy

  3. Metamorphic rocks

  4. 変質岩

  5. Mineralogy

Research Areas 1

  1. Natural Science / Solid earth sciences  / Petrology, Mineralogy, Spectroscopy

Current Research Project and SDGs 1

  1. 脆性鉱物の表面分析方法の確立

Research History 3

  1. Nagoya University   Graduate School of Environmental Studies Department of Earth and Environmental Sciences   Lecturer

    2020.7

  2. Nagoya University   Graduate School of Environmental Studies Department of Earth and Environmental Sciences   Assistant Professor

    2015.3 - 2020.6

  3. JSPS Research Fellowship for Young Scientists   Researcher

    2013.4 - 2015.2

      More details

    Country:Japan

Education 3

  1. Nagoya University   Graduate School of Environmental Studies   Earth and Environmental Sciences

    2010.4 - 2013.3

      More details

    Country: Japan

  2. Nagoya University   Graduate School of Environmental Studies   Earth and Environmental Sciences

    2008.4 - 2010.3

      More details

    Country: Japan

  3. Nagoya University   Faculty of Science   Department of Earth and Planetary Sciences

    2004.4 - 2008.3

      More details

    Country: Japan

Professional Memberships 4

  1. The Geological Society of Japan

    2016.4

  2. Japan Geoscience Union

    2010.1

  3. The Geological Society of Japan

    2007.9

  4. Japan Association of Mineralogical Sciences

    2007.9

Committee Memberships 3

  1. 日本地球掘削科学コンソーシアム   IODP部会執行委員会  

    2020.6   

      More details

    Committee type:Academic society

  2. 日本地質学会   日本地質学会第127年学術大会実行委員  

    2020.3 - 2021.9   

      More details

    Committee type:Academic society

  3. 日本地質学会   中部支部区 代議員  

    2016.4   

      More details

    Committee type:Academic society

Awards 5

  1. The Geological Society of Japan Sakuyama Masanori Award

    2021.9   The Geological Society of Japan  

     More details

    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

  2. 名古屋大学石田賞

    2021.12   名古屋大学   分光法を応用した地質温度圧力計の開発と地球内部環境の解明

     More details

    Award type:Award from publisher, newspaper, foundation, etc.  Country:Japan

  3. Island Arc Award 2017

    2017.9   The Geological Society of Japan   A new approach to develop the Raman carbonaceous material geothermometer for low-grade metamorphism using peak width, Island Arc, 23, 33-50.

    Yui Kouketsu, Tomoyuki Mizukami, Hiroshi Mori, Shunsuke Endo, Mutsuki Aoya, Hidetoshi Hara, Daisuke Nakamura, Simon Wallis

     More details

    Award type:Award from Japanese society, conference, symposium, etc.  Country:Japan

  4. Island Arc Most Downloaded Award

    2016.9   Wiley   A new approach to develop the Raman carbonaceous material geothermometer for low-grade metamorphism using peak width.

    Yui Kouketsu, Tomoyuki Mizukami, Hiroshi Mori, Shunsuke Endo, Mutsuki Aoya, Hidetoshi Hara, Daisuke Nakamura, Simon Wallis

     More details

    Award type:Award from publisher, newspaper, foundation, etc.  Country:Japan

  5. 日本地質学会論文賞

    2015.9   日本地質学会  

     More details

    Country:Japan

    受賞論文:"A new approach to develop the Raman carbonaceous material geothermometer for low-grade metamorphism using peak width", Island Arc 2015, vol. 23, pp. 33-50

 

Papers 50

  1. Recognition of Detrital Carbonaceous Material in the Ryoke Metamorphic Belt by Using Raman Thermometry: Implications for Thermal Structure and Detrital Origin Reviewed

    Ken Yamaoka; Simon R. Wallis; Akira Miyake; Yui Kouketsu

    Lithosphere   Vol. 1   page: 3899340   2022.4

     More details

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

    DOI: https://doi.org/10.2113/2022/3899340

  2. Raman Geobarometry of Quartz Inclusions in Kyanite: Application to Quart Eclogite from the Gongen Area of the Sanbagawa Belt, Southwest Japan Reviewed

    Yuki Tomioka, Yui Kouketsu, Tomoki Taguchi

    The Canadian Mineralogist     2022.2

     More details

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

  3. Formation process of Al-rich calcium amphibole in quartz-bearing eclogites from the Sulu belt, China Reviewed

    Masaki Enami, Tomoki Taguchi, Yui Kouketsu, Katsuyoshi Michibayashi, Tadao Nishiyama

    American Mineraglogist   Vol. in press   2022

     More details

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

  4. Tectonic discontinuity, partial melting and exhumation in the Garhwal Himalaya (Northwest India): Constrains from spatial and temporal pressure-temperature conditions along the Bhagirathi valley Reviewed International coauthorship

    Ryoichi Kawabata, Takeshi Imayama, Narayan Bose, Keewook Yi, Yui Kouketsu

    LITHOS   Vol. 404   2021.12

     More details

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

    The pattern and timing of tectonic discontinuity and partial melting in the Garhwal Himalaya, resulting from the India-Asia collision, are crucial factors for understanding the evolution of the Himalayan orogen, but these parameters remain poorly constrained. Middle-to high-grade metamorphic rocks from the Main Central Thrust (MCT) zone and the High Himalaya Crystalline Sequence (HHCS) along the Bhagirathi valley in northwest India have been investigated in this study. The primary mineral assemblage of the gneisses and migmatites in the HHCS is garnet + biotite + white mica + quartz + kyanite + rutile +/- ilmenite +/- sillimanite. The metamorphic grade at thermal peak rapidly increases upwards across the MCT from garnet schists (515-550 degrees C, 8-9 kbar) in the footwall to garnet-bearing migmatite (705-735 degrees C, 10-13 kbar) in the hanging wall. The P-T condition decreased upwards in kyanite gneiss of the lower HHCS (690 degrees C, 8.3 kbar), yielding a high field pressure gradient near the MCT. The prominent metamorphic discontinuity could have been caused by the southward extrusion of the HHCS along with the MCT. The base of the HHCS experienced high-grade metamorphism at 38-25 Ma, mainly at 31.9 +/- 0.5 Ma. The new data, combined with previous studies, suggest that the prominent metamorphic discontinuity is characterized by the different periods of peak metamorphism and the overprint in the hanging wall (Eocene-Oligocene metamorphism and Early Miocene overprint) and footwall (Early Miocene metamorphism and Late Miocene to Pliocene overprint) of the MCT. The second metamorphic discontinuity occurred near the migmatite zone in the lower-middle HHCS, which experienced the anatexis (690-740 degrees C, 7-9 kbar) at 37-25 Ma, mainly at 33.9 +/- 1.2 Ma. The Bhagirathi HHCS experienced a regional Barrovian-type Eohimalayan metamorphism associated with fluid-present melting of muscovite + plagioclase + quartz + H2O -> melt +/- kyanite at 34-32 Ma without a strong Miocene overprint. The period of partial melting is significantly older than the intrusion of ca. 22 Ma Early Miocene Gangotri leucogranites at the top of the HHCS. Protracted periods of crystallization (38-22 Ma) indicate a long duration of more than ca. 15 Myr of anatexis, from initiation of migmatization to pluton formation in the Bhagirathi HHCS. The protracted fluid-present melting and subsequent rapid exhumation in the Bhagirathi HHCS could be associated with heterogeneous extrusion forming the tectonic discontinuity in the lower-middle HHCS. The metamorphic grade decreased towards the upper HHCS (620 degrees C, 6.5 kbar) across the Jhala Normal Fault where occurs in the right-way-up sequence. On the other hand, in the central Himalaya, the thrusting occurred between upper HHCS and lower-middle HHCS in the inverted metamorphic sequence. The Early Miocene migmatites in the footwall of the significant tectonic discontinuity are dominant, and diachronous extrusion accompanied with the fluid-absent melting reactions is the common mechanism to exhume the HHCS, unlike the heterogeneous extrusion in the northwest Himalaya.

    DOI: 10.1016/j.lithos.2021.106488

    Web of Science

  5. Melting and Evolution of Amphibole‐Rich Back‐Arc Abyssal Peridotites at the Mado Megamullion, Shikoku Basin Reviewed International coauthorship

    A. Sen, J. E. Snow, Y. Ohara, K. Hirauchi, Y. Kouketsu, A. Sanfilippo, V. Basch, Y. Harigane, M. Fujii, K. Okino, N. Akizawa

    Geochemistry, Geophysics, Geosystems   Vol. 22 ( 12 )   2021.12

     More details

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

    DOI: 10.1029/2021GC010013

    Web of Science

    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1029/2021GC010013

  6. Crucial Scientific Issues in Earth Science Revealed Only by Mantle Drilling: Understanding the Current State of the Oceanic Plates of a Life-bearing Planet Reviewed

    MORISHITA Tomoaki, FUJIE Gou, HIRAUCHI Ken-ichi, KATAYAMA Ikuo, KOUKETSU Yui, KURODA Jun-ichiro, OKAMOTO Atsushi, ONO Shigeaki, MICHIBAYASHI Katsuyoshi, MORONO Yuki, YAMAMOTO Shinji

    Journal of Geography (Chigaku Zasshi)   Vol. 130 ( 4 ) page: 483 - 506   2021.8

     More details

    Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:Tokyo Geographical Society  

    <p> In the 1950s, the aim of the original mantle drilling projects was to obtain oceanic mantle samples in order to address the unanswered question of what constitutes the Earth's mantle. However, in the 21st century, it is widely accepted that the uppermost mantle is mainly composed of peridotite. Now, the challenge of mantle drilling is to understand crucial unsolved issues of earth science. Today's Earth is different from other planets due to the existence of life and plate tectonics. It is emphasized that mantle drilling is the only way to obtain the oceanic crust from top to bottom and an active mantle sample from an oceanic plate. The crucial issues that can only be addressed by mantle drilling are: (1) limits of life in an oceanic plate and its controlling factors, and (2) formation process of an oceanic plate and its modification. Modification of an oceanic plate, especially the weakening of plate strength, is required for plate tectonics. These two issues are interrelated. Long seismic profiles of oceanic plates reveal the diversity of Moho seismic reflection regions: clear, unclear, diffuse and non-Moho regions. Faults and/or fracturing in oceanic plates and subsequent seawater flow can modify oceanic plates locally, probably causing the diversity of oceanic Moho, as well as the rheological behavior of oceanic plates. Fluid flows along faults/fractures also extend the biosphere of oceanic plates. The first drilling sample should be a reference to the oceanic crust and the uppermost mantle, and define the nature of the Moho at the site, as well as constrain reasons for the diversity of the Moho in other areas. Deep sampling, such as mantle drilling in an old oceanic plate, can penetrate the biosphere/non-biosphere boundary, which tells us about the controlling factors of the limit of life. This information may help us find extraterrestrial life. After mantle drilling is completed, the borehole is the only window from the ocean floor to the mantle. An in-situ mantle observatory in the mantle hole to monitor plate movement and fluid flow with biological activity within an oceanic plate is also suggested. Detecting geoneutrinos at the mantle site allows the amounts and distributions of radioactive elements from the Earth's mantle to be measured. These provide basic information on the Earth's heat sources and the evolutionary history of the mantle.</p>

    DOI: 10.5026/jgeography.130.483

    Web of Science

    CiNii Research

  7. Deformation characteristics and peak temperatures of the Sanbagawa Metamorphic and Shimanto Accretionary complexes on the central Kii Peninsula, SW Japan Reviewed

    Yusuke Shimura, Tetsuya Tokiwa, Hiroshi Mori, Makoto Takeuchi, Yui Kouketsu

    JOURNAL OF ASIAN EARTH SCIENCES   Vol. 215   2021.8

     More details

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

    Structural analyses based on field survey and peak-temperature estimations using Raman spectra of carbonaceous-material thermometry were conducted for the Cretaceous subduction complexes on the central Kii Peninsula, southwest Japan, where there is a direct contact region between the Sanbagawa high-P/low-T Metamorphic Complex (MC) and the Shimanto Accretionary Complex (AC). In the study area, the Kosoku, Iro, and Mugitani complexes are arranged in descending order of structural position. The Kosoku and Iro complexes record exhumation-related deformation, which produced schistosity, stretching lineation, and folds, and peak temperatures of 280-440 degrees C. In contrast, the Mugitani Complex records both earlier accretion-related deformation which produced block-in-matrix structures and later exhumation-related deformation, as well as peak temperatures of 280-290 degrees C. The Mugitani Complex shares deformation characteristics with both the Shimanto AC and the Sanbagawa MC, and covers the interval from the upper temperatures of the Shimanto AC to the lower temperatures of the Sanbagawa MC. In addition, the two types of deformation differ in their kinematic patterns, suggesting that they took place diachronously in different tectonic settings in the subduction zone. We propose that exhumation-related Sanbagawa deformation occurred in a warm tectonic environment, such as ridge approach to the subduction zone.

    DOI: 10.1016/j.jseaes.2021.104791

    Web of Science

  8. Thermal structure in subducted units from continental Moho depths in a palaeo subduction zone, the Asemigawa region of the Sanbagawa metamorphic belt, SW Japan Reviewed

    Yui Kouketsu, Kazushi Sadamoto, Hayato Umeda, Hirokazu Kawahara, Takayoshi Nagaya, Tomoki Taguchi, Hiroshi Mori, Simon Wallis, Masaki Enami

    JOURNAL OF METAMORPHIC GEOLOGY   Vol. 39 ( 6 ) page: 727 - 749   2021.8

     More details

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

    Raman CM geothermometry applied to 126 samples of pelitic schists collected over an area of 11 km x 7 km reveals the thermal structure of the Asemigawa region of the Sanbagawa metamorphic belt, southwest Japan in unprecedented detail. In general, the estimated temperatures gradually increase from south to north in the range of 288-553 degrees C. However, a temperature gap from similar to 380 to similar to 440 degrees C is identified near the boundary between the chlorite and garnet zones. This temperature region matches the depth of the continental Moho of the Sanbagawa subduction zone. The temperature gradient in the higher-temperature domain is higher than that in the lower-temperature domain, and large-scale tight folds that affect the thermal structure are developed in the high-grade units and in the vicinity of the temperature discontinuity. These geological structures probably reflect that the exhumed slab units was dammed at the Moho depth due to the upward movement being impeded by increase in the coupling strength of the overlying rocks associated with exhumation from beneath serpentinite rocks to a shallower domain overlain by crustal rocks. Changes in the coupling strength along the subduction boundary led the strong folding at the higher-temperature domain and the pre-formed foliation developed at the Moho depth may have acted as the tectonic boundary, resulting in a temperature discontinuity. These results will contribute to elucidating various geological phenomena occurring in the forearc regions of modern subduction zones.

    DOI: 10.1111/jmg.12584

    Web of Science

    CiNii Research

  9. Igneous and metamorphic rocks in Kasuga region, western Gifu Prefecture, Japan Invited Reviewed

    Enami Masaki, Kouketsu Yui, Kato Takenori, Tsuboi Motohiro, Niwa Takefumi

    The Journal of the Geological Society of Japan   Vol. 127 ( 6 ) page: 313 - 331   2021.6

     More details

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

    DOI: 10.5575/geosoc.2021.0010

    CiNii Research

  10. Fe–rich olivine from an andesite dike in Miocene Shitara volcanic rocks, central Japan: a revised relationship between Mg/Fe ratio and Raman spectrum in olivine Reviewed

    ENAMI Masaki, NISHII Aya, MOURI Takashi, TSUBOI Motohiro, KOUKETSU Yui

    Journal of Mineralogical and Petrological Sciences   Vol. 116 ( 3 ) page: 113 - 120   2021.6

     More details

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

    <p>Olivine is a major mineral in ultramafic and mafic rocks. Due to the higher Mg/Fe partition coefficient of olivine than the coexisting phases, the occurrences of Mg–poorer olivine grains, especially with Mg#[= Mg/(Mg + Fe<sup>2+</sup>)] = 0.2–0.6, are rarely reported, and thus, their spectroscopic data are limited. Fe–rich olivine phenocrysts showing compositional zoning with Mg# = ~ 0.5 (core) and ~ 0.3 (rim) and microphenocrysts with Mg# = ~ 0.4 (core) and ~ 0.2 (rim) occur in basaltic trachyandesite of Miocene Shitara volcanic rocks in central Japan. These olivine grains were investigated by Raman spectroscopy. Combining our data with the published values, we have revised the equation for Mg#–Raman spectrum relationship proposed by Mouri and Enami (2008) as follows: Mg# = 0.005446<i>ω</i> <sup>2</sup> − 0.20259<i>ω</i> + 1.8442 (correlation coefficient <i>r</i> <sup>2</sup> = 0.984), where <i>ω</i> is the difference between the doublet peak positions (<i>κ</i><sub>2</sub> − <i>κ</i><sub>1</sub>).</p>

    DOI: 10.2465/jmps.201204

    Web of Science

    CiNii Research

  11. Hidden intact coesite in deeply subducted rocks Reviewed

    Tomoki Taguchi, Yui Kouketsu, Yohei Igami, Tomoyuki Kobayashi, Akira Miyake

    EARTH AND PLANETARY SCIENCE LETTERS   Vol. 558   2021.3

     More details

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

    The stabilization of coesite is a diagnostic indicator of ultrahigh-pressure metamorphism and in many cases it implies that a rock has been subducted to a minimum depth of 80 km. Coesite typically occurs as rare relicts in rigid host minerals, but most commonly transforms into alpha-quartz pseudomorphs during exhumation. The abundance of coesite-bearing rocks in orogens worldwide is a contentious issue in the petrological community, despite evidence from numerical modeling that suggests that coesite formation should be a common geological process during ultrahigh-pressure metamorphism. This knowledge gap must be addressed to improve the understanding of the geological aspects of subductionzone geodynamics. Here we report that minuscule coesites (<20 mu m) occur as abundant inclusions in garnet-rich layers from the Italian Western Alps. The discovery of such intact inclusions may fill the gaps in the predicted and observed abundances of coesite worldwide. Through integrated approaches with resolutions down to the nano-scale, we show that these garnet-hosted inclusions are composed entirely of coesite. Our results suggest that common coesite-derived quartz pseudomorphs are less typical structures in ultrahigh-pressure metamorphic rocks and the minuscule coesite in many rocks may be overlooked because of its size. These findings open up new research directions for constraining the extent of deeply subducted rocks and their rheology. (C) 2021 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.epsl.2021.116763

    Web of Science

  12. Metamorphic Thermal Structure of the Outer Zone of Southwest Japan in the Koshibu-gawa Section, Nagano Prefecture, Central Japan Reviewed

    Hiroshi MORI, Yosuke TOMOOKA, Tetsuya TOKIWA and Yui KOUKETSU

    Journal of Geography (Chigaku Zasshi)   Vol. 130 ( 1 ) page: 85 - 98   2021.3

     More details

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

    DOI: https://doi.org/10.5026/jgeography.130.85

  13. Reconfirmation of jadeite in the Sanbagawa belt of the Shibukawa region, central Japan: Occurrence within a veinlet cutting dunite Reviewed

    Shioya Hikaru, Michibayashi Katsuyoshi, Kouketsu Yui, Enami Masaki

    The Journal of the Geological Society of Japan   Vol. 127 ( 1 ) page: 59 - 65   2021.1

     More details

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

    <p>The Shibukawa region of the Sanbagawa belt, central Japan, is one of the historic jadeite localities in Japan. Although its petrological and mineralogical characteristics of the locality were briefly reported over 35 years ago, no further studies have been conducted since the disappearance of the jadeite-bearing outcrop. Recently, jadeite was discovered within a veinlet in a host dunite boulder, a member of an ultrabasic body that is surrounded by the Sanbagawa crystalline schists in the Shibukawa region. The veinlet is composed mainly of diopside, OH-bearing grossular, jadeite, chlorite, pargasite and serpentine. Relict olivine and spinel, which were probably members of the host dunite, rarely occur in the veinlet. The jadeite grains vary from <1 to 50 µm in size, and occur as patchy aggregates with amoeba-shaped grossular grains. The jadeite grains have Na<sub>2</sub>O and Al<sub>2</sub>O<sub>3</sub> contents of 14.7-15.4 wt.% and 24.3-25.5 wt.%, respectively, and are 91-98% jadeite contents [(Na-Fe<sup>3+</sup>)×100].</p>

    DOI: 10.5575/geosoc.2020.0050

    CiNii Research

  14. Alteration processes recorded by back‐arc mantle peridotites from oceanic core complexes, Shikoku Basin, Philippine Sea Reviewed International coauthorship

    Ken‐ichi Hirauchi, Izumi Segawa, Yui Kouketsu, Yumiko Harigane, Yasuhiko Ohara, Jonathan Snow, Atlanta Sen, Masakazu Fujii, Kyoko Okino

    Island Arc   Vol. 30 ( 1 )   2021.1

     More details

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

    DOI: 10.1111/iar.12419

    Web of Science

    Other Link: https://onlinelibrary.wiley.com/doi/full-xml/10.1111/iar.12419

  15. Semi-brittle deformation of antigorite serpentinite under forearc mantle wedge conditions Invited Reviewed

    Ken-ichi Hirauchi, Ikuo Katayama, Yui Kouketsu

    Journal of Structural Geology   Vol. 140   page: 104151 - 104151   2020.11

     More details

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

    DOI: 10.1016/j.jsg.2020.104151

    Web of Science

  16. Attenuated total reflection infrared (ATR–IR) spectroscopy of antigorite, chrysotile, and lizardite

    SAKAGUCHI Ilona, KOUKETSU Yui, MICHIBAYASHI Katsuyoshi, WALLIS Simon R.

    Journal of Mineralogical and Petrological Sciences   Vol. 115 ( 4 ) page: 303 - 312   2020.8

     More details

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

    <p>Attenuated total reflection infrared (ATR–IR) spectroscopy allows measurements to be made directly from the surface of one–sided, diamond polished thin sections of geological samples. This method greatly reduces the sample preparation time when compared to other IR spectroscopy methods and opens the possibility of using infrared spectroscopy to study thin–section scale microstructures. ATR–IR spectroscopy of antigorite, chrysotile, and lizardite in samples from the Mt. Shiraga serpentinite body, central Shikoku, SW Japan, reveals clear spectral differences in the 650–1250 cm<sup>−1</sup> region associated with the vibration of the Si–O bonds in SiO<sub>4</sub> tetrahedra and in the 3300–3750 cm<sup>−1</sup> region associated with the vibration of the O–H bond in MgO<sub>2</sub>(OH)<sub>4</sub> octahedra. A data–processing algorithm developed in this study allows the absorbance intensity and wavenumber of a particular absorbance peak to be used to create serpentine mineral phase maps based on the highest intensity Si–O absorbance bands for antigorite, chrysotile, and lizardite. Our methodology can be used to map serpentinite microstructures in thin sections illustrating the potential of ATR–IR as a relatively un–explored analytical tool in petrological studies. A combination of ATR–IR and electron microprobe data shows that for antigorite the wavenumber of the O–H absorbance band is correlated with the Fe content. Metamorphic reactions of serpentine minerals play a key role in the hydrodynamics of the earth’s lithosphere, and the new information on serpentine mineral hydroxyl group behavior obtained by applying the technique outlined in this study are of great potential interest to researchers in a wide range of different fields.</p>

    DOI: 10.2465/jmps.190807

    Web of Science

    CiNii Research

  17. Quantitative analysis of trace elements in olivine with ICP-MS

    Kozaka Yukiko, Kato Takenori, Michibayashi Katsuyoshi, Kouketsu Yui, Asahara Yoshihiro

    Abstracts of Annual Meeting of the Geochemical Society of Japan   Vol. 67 ( 0 ) page: 131   2020

     More details

    Authorship:Corresponding author   Language:Japanese   Publishing type:Research paper (other academic)   Publisher:GEOCHEMICAL SOCIETY OF JAPAN  

    <p></p>

    DOI: 10.14862/geochemproc.67.0_131

    CiNii Research

  18. Findings of intact coesite in garnet and its implication: Evidence from the Lago di Cignana Unit, Western Alps, Italy

    Taguchi Tomoki, Kouketsu Yui, Igami Yohei, Miyake Akira

    Annual Meeting of the Geological Society of Japan   Vol. 2019 ( 0 ) page: 119 - 119   2019.9

     More details

    Language:Japanese   Publishing type:Research paper (other academic)   Publisher:The Geological Society of Japan  

    DOI: 10.14863/geosocabst.2019.0_119

    CiNii Research

  19. Discovery of unusual metamorphic temperatures in the Yuli belt, eastern Taiwan: New interpretation of data by Raman carbonaceous material geothermometry Reviewed International coauthorship

    Yui Kouketsu, Chin-Ho Tsai, Masaki Enami

    GEOLOGY   Vol. 47 ( 6 ) page: 522 - 526   2019.6

     More details

    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:GEOLOGICAL SOC AMER, INC  

    The crystallinity of carbonaceous material (CM) in metasedimentary schists in the Yuli belt, eastern Taiwan, shows unusual diversity. The difference between the maximum and minimum temperatures estimated by a Raman CM geothermometer reaches 200 degrees C, which is much wider than those in other metamorphic belts and contact aureoles. In light of these results, we considered two possible explanations: (1) a mixture of detrital and metamorphic graphite grains, and (2) a mixture of different reactive CM during short-lived metamorphism. One sample shows a near-bimodal peak, suggesting the former hypothesis, while the other two samples show a continuous single peak, suggesting the latter possibility. Detailed analyses of CM crystallinities have the potential to extract information relating not only to the peak metamorphic temperature, but also to the pre-metamorphic history or the duration of heating in a metamorphic belt.

    DOI: 10.1130/G45934.1

    Web of Science

    CiNii Research

  20. Drastic effect of shearing on graphite microtexture: attention and application to Earth science Reviewed

    Yui Kouketsu, Akira Miyake, Yohei Igami, Tomoki Taguchi, Hiroyuki Kagi, Masaki Enami

    Progress in Earth and Planetary Science   Vol. 6 ( 1 )   2019.3

     More details

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

    © 2019, The Author(s). The microtexture of graphite exposed on the polished surface was studied using confocal laser scanning microscopy, laser Raman spectroscopy, and focused ion beam–transmission electron microscopy (FIB–TEM) to elucidate the effect on surface condition and crystallinity of graphite by polishing process. The polished surface of the graphite was divided into a flat part with no irregularities and a grooved band with a width of < 1 μm and a depth of < 100 nm. Raman analyses revealed that the original structure of the graphite covered by the host mineral was a well-ordered graphite, whereas the polished graphite at the surface had a reduced crystallinity, particularly in the flat part of the sample. Based on scanning TEM observations of an ultra-thin FIB section, fractures that developed during sample preparation were concentrated in the region extending from the surface to a depth of 1 μm. Furthermore, graphite sheets were peeled away by shearing, with scraped graphite sheets filling in the gap. Our results demonstrate that the original microtexture of graphite was easily deformed by shearing during polishing, and careful attention should be paid to sample preparation. In addition, we also need to pay more attention to the effects of natural shearing such as faulting on the graphite or sheet-like minerals. [Figure not available: see fulltext.].

    DOI: 10.1186/s40645-019-0271-4

    Web of Science

    Scopus

  21. Metamorphic record of the Asemi‐gawa eclogite unit in the Sanbagawa belt, southwest Japan: Constraints from inclusions study in garnet porphyroblasts Reviewed

    Tomoki Taguchi, Masaki Enami, Yui Kouketsu

    Journal of Metamorphic Geology   Vol. 37   page: 181-201   2019.2

     More details

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

    DOI: 10.1111/jmg.12456

  22. Structural and petrological characteristics of "the Shibukawa ultramafic body" in the Sanbagawa belt, western shizuoka, Japan and its petrogenesis.

    Shioya Hikaru, Michibayashi Katsuyoshi, Hirauchi Ken-ichi, Kouketsu Yui, Naemura Kosuke

    Annual Meeting of the Geological Society of Japan   Vol. 2019 ( 0 ) page: 98 - 98   2019

     More details

    Language:Japanese   Publishing type:Research paper (other academic)   Publisher:The Geological Society of Japan  

    DOI: 10.14863/geosocabst.2019.0_98

    CiNii Research

  23. Thermal and deformation structure of slab near the Moho discontinuity in the Asemigawa region of the Sanbagawa belt

    Kouketsu Yui, Sadamoto Kazushi, Umeda Hayato, Kawahara Hirokazu, Nagaya Takayoshi, Taguchi Tomoki, Mori Hiroshi, Wallis Simon, Enami Masaki

    Annual Meeting of the Geological Society of Japan   Vol. 2019 ( 0 ) page: 116 - 116   2019

     More details

    Authorship:Lead author   Language:Japanese   Publishing type:Research paper (other academic)   Publisher:The Geological Society of Japan  

    DOI: 10.14863/geosocabst.2019.0_116

    CiNii Research

  24. Verification of metamorphic history recorded in antigorite from Mt. Shiraga region of the Sanbagawa metamorphic belt

    Ando Kota, Kouketsu Yui, Michibayashi Katsuyoshi

    Annual Meeting of the Geological Society of Japan   Vol. 2019 ( 0 ) page: 399 - 399   2019

     More details

    Language:Japanese   Publishing type:Research paper (other academic)   Publisher:The Geological Society of Japan  

    DOI: 10.14863/geosocabst.2019.0_399

    CiNii Research

  25. Spatial distribution of halogen compositions in the wedge mantle-derived Shiraga metaserpentinite body of the Sanbagawa metamorphic belt

    Ren Jie, Sumino Hirochika, Kouketsu Yui, Simon Wallis

    Abstracts of Annual Meeting of the Geochemical Society of Japan   Vol. 66 ( 0 ) page: 242 - 242   2019

     More details

    Language:Japanese   Publishing type:Research paper (other academic)   Publisher:GEOCHEMICAL SOCIETY OF JAPAN  

    <p></p>

    DOI: 10.14862/geochemproc.66.0_242

    CiNii Research

  26. Comparison of Infrared Spectroscopy Methods Applied to Serpentine Minerals International coauthorship

    Sakaguchi Ilona, Kouketsu Yui, Michibayashi Katsuyoshi, Wallis Simon

    Annual Meeting of the Geological Society of Japan   Vol. 2018 ( 0 ) page: 406   2018

     More details

    Language:English   Publishing type:Research paper (other academic)   Publisher:The Geological Society of Japan  

    DOI: 10.14863/geosocabst.2018.0_406

    CiNii Research

  27. Verification of water detectability in minerals by ATR method of micro infrared spectroscopy

    Kouketsu Yui, Kakihata Yuki, Shimizu Kenji, Michibayashi Katsuyoshi, Wallis Simon

    Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences   Vol. 2018 ( 0 ) page: 21 - 21   2018

     More details

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

    Infrared spectroscopy is one of effective analytical methods for detecting water in minerals, but there was a disadvantage that it takes time to prepare samples. In this study, we used a ATR method that can analyze using ordinary rock polished thin sections. Water of several to several hundred ppm order in olivine and garnet grains was not detected, but the sharp peak at ~3700 cm<sup>-1</sup> was detected within the olivine porphyroclast in the ultra-mylonite. Further improvement is necessary, but it is expected that the ATR method will develop as a useful analytical method in the future.

    DOI: 10.14824/jakoka.2018.0_21

    CiNii Research

  28. The deformation structures and maximum metamorphic temperatures around the Sanbagawa-Shimanto boundary in the central Kii Peninsula

    Shimura Yusuke, Tokiwa Tetsuya, Mori Hiroshi, Takeuchi Makoto, Kouketsu Yui

    Annual Meeting of the Geological Society of Japan   Vol. 2018 ( 0 ) page: 408 - 408   2018

     More details

    Language:Japanese   Publishing type:Research paper (other academic)   Publisher:The Geological Society of Japan  

    DOI: 10.14863/geosocabst.2018.0_408

    CiNii Research

  29. Static stage during exhumation process of regional metamorphic rocks

    Enami Masaki, Kouketsu Yui

    Annual Meeting of the Geological Society of Japan   Vol. 2018 ( 0 ) page: 126 - 126   2018

     More details

    Language:Japanese   Publishing type:Research paper (other academic)   Publisher:The Geological Society of Japan  

    DOI: 10.14863/geosocabst.2018.0_126

    CiNii Research

  30. Contrasting patterns of fluid flow along the base of the shallow mantle wedge: Example from the Sanbagawa belt

    Yokota Mari, Wallis Simon, Kouketsu Yui

    Annual Meeting of the Geological Society of Japan   Vol. 2018 ( 0 ) page: 119 - 119   2018

     More details

    Language:Japanese   Publishing type:Research paper (other academic)   Publisher:The Geological Society of Japan  

    DOI: 10.14863/geosocabst.2018.0_119

    CiNii Research

  31. Raman geothermometry of carbonaceous material in the basal Ediacaran Doushantuo cap dolostone: The thermal history of extremely negative delta C-13 signatures in the aftermath of the terminal Cryogenian snowball Earth glaciation Reviewed

    Zhou Wang, Jiasheng Wang, Yui Kouketsu, Robert J. Bodnar, Benjamin C. Gill, Shuhai Xiao

    PRECAMBRIAN RESEARCH   Vol. 298   page: 174 - 186   2017.9

     More details

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

    Extremely negative delta C-13 values (as low as -48%) of blocky calcite cements filling cavities, sheet-cracks, and fractures in the basal Ediacaran cap dolostone of the Doushantuo Formation in South China have been considered as evidence for methane release possibly associated with gas hydrate destabilization in the aftermath of the terminal Cryogenian snowball Earth glaciation. Alternatively, these extremely negative delta C-13 values may have resulted from oxidation of thermogenic methane derived from localized hydrothermal activity long after the deposition of the Doushantuo cap dolostone. The latter interpretation was based on carbonate clumped isotope thermometry suggesting that the precipitation of extremely C-13-depleted calcite occurred at temperatures up to 476 degrees C (mean = 378 degrees C, n = 4) whereas carbonate fabrics with moderately negative delta C-13 values (generally &gt; -10%) were formed at much lower temperatures (mean = 112 degrees C, n = 4). To assess these competing hypotheses, we systematically investigated the petrography, carbonate carbon and oxygen isotopes, and carbonaceous material (CM) Raman spectroscopy of the Doushantuo cap carbonate. Raman geothermometry suggests that CM associated with different microfabrics and delta C-13 signatures including sedimentary fabrics with moderately negative delta C-13 values (e.g., peloids, stromatolite laminae, microbial mat fragments), diagenetic fabrics with moderately negative delta C-13 values (e.g., some void-filling or crack-filling cements), and diagenetic fabrics with extremely negative delta C-13 values (e.g., void-filling or crack-filling blocky and bladed calcites) experienced temperatures generally &lt;300 degrees C (largely 200-300 degrees C). Contrary to temperature estimates based on carbonate clumped isotopes, CM Raman geothermometry reveals that different microfabrics show largely overlapping paleotemperatures and that there is no apparent relationship between delta C-13 signatures and paleotemperatures. Whereas the origins of these extremely negative delta C-13 values remain unresolved, the Raman geothermometric data challenge the previous interpretation that they were derived from thermogenic methane related to localized hydrothermal activity at temperatures up to almost 500 degrees C that only affected the thermal history of the calcite with extremely negative delta C-13 values. Instead, the new data suggest that the analyzed microfabrics experienced the same peak temperatures &lt;300 degrees C, probably related to the burial history of the host rocks or pervasive hydrothermal activity that affected all micro fabrics in the Doushantuo cap dolostone. (C) 2017 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.precamres.2017.06.013

    Web of Science

  32. AWARD 2017 Island Arc Award

    Kouketsu Yui, Mizukami Tomoyuki, Mori Hiroshi, Endo Shunsuke, Aoya Mutsuki, Hara Hidetoshi, Nakamura Daisuke, Wallis Simon

    ISLAND ARC   Vol. 26 ( 3 )   2017.5

     More details

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

    DOI: 10.1111/iar.12212

    Web of Science

  33. Raman spectra of carbonaceous materials in a fault zone in the Longmenshan thrust belt, China; comparisons with those of sedimentary and metamorphic rocks Reviewed

    Yui Kouketsu, Ichiko Shimizu, Yu Wang, Lu Yao, Shengli Ma, Toshihiko Shimamoto

    TECTONOPHYSICS   Vol. 699   page: 129 - 145   2017.3

     More details

    Authorship:Lead author   Language:Japanese   Publishing type:Research paper (scientific journal)   Publisher:ELSEVIER SCIENCE BV  

    We analyzed micro-Raman spectra of carbonaceous materials (CM) in natural and experimentally deformed fault rocks from Longmenshan fault zone that caused the 2008 Wenchuan earthquake, to characterize degree of disordering of CM in a fault zone. Raman spectral parameters for 12 samples from a fault zone in Shenxigou, Sichuan, China, all show low-grade structures with no graphite. Low crystallinity and delta C-13 values (-24%o to -25%) suggest that CM in fault zone originated from host rocks (Late Triassic Xujiahe Formation). Full width at half maximum values of main spectral bands (D1 and D2), and relative intensities of two subbands (D3 and D4) of CM were variable with sample locations. However, Raman parameters of measured fault rocks fall on established trends of graphitization in sedimentary and metamorphic rocks. An empirical geothermometer gives temperatures of 160-230 degrees C for fault rocks in Shenxigou, and these temperatures were lower for highly sheared gouge than those for less deformed fault breccia at inner parts of the fault zone. The lower temperature and less crystallinity of CM in gouge might have been caused by the mechanical destruction of CM by severe shearing deformation, or may be due to mixing of host rocks on the footwall. CM in gouge deformed in high-velocity experiments exhibits slight changes towards graphitization characterized by reduction of D3 and D4 intensities. Thus low crystallinity of CM in natural gouge cannot be explained by our experimental results. Graphite formation during seismic fault motion is extremely local or did not occur in the study area, and the CM crystallinity from shallow to deep fault zones may be predicted as a first approximation from the graphitization trend in sedimentary and metamorphic rocks. If that case, graphite may lower the friction of shear zones at temperatures above similar to 300 degrees C, deeper than the lower part of seismogenic zone. (C) 2017 Elsevier B.V. All rights reserved.

    DOI: 10.1016/j.tecto.2017.01.015

    Web of Science

  34. Protolith of the Stak eclogite in the northwestern Himalaya Reviewed

    Yui Kouketsu, Keiko Hattori, Stephane Guillot

    ITALIAN JOURNAL OF GEOSCIENCES   Vol. 136 ( 1 ) page: 64 - 72   2017.2

     More details

    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)   Publisher:SOC GEOLOGICA ITALIANA  

    This paper reports the major, minor and trace element abundances and Nd isotope compositions of bulk rock samples of eclogites from the Stak Valley in northwestern Himalaya and discusses their protolith. Major element compositions confirm the basaltic nature of the protolith. Trace element abundances normalized to the primitive mantle show almost flat patterns at ten times the primitive mantle values with slightly high concentrations of Th and light rare earth elements. These patterns are similar to those of enriched MORBs. Neodymium isotope compositions are chondritic and the values of eNd lie between those of MORB and old Indian continental crust. Immobile trace element contents of Stak eclogites are similar to those of the Permian Panjal Traps and significantly different from those of the Deccan Traps erupted at 73-66 Ma in the northwestern Indian plate, suggesting that the Panjal Traps is the protolith of the Stak eclogites. The protoliths of ultra-high pressure eclogites in the Kaghan and Tso Moran massifs in northwestern Himalaya are also interpreted to be the Panjal Traps. The results of this study suggest that a large Permian igneous province developed at the northwestern margin of the Indian plate before the collision with the Eurasian continent.

    DOI: 10.3301/IJG.2015.41

    Web of Science

  35. Water subduction processes constrained by halogens and noble gases in the Sanbagawa metamorphic rocks

    Sumino Hirochika, R. Wallis Simon, Kouketsu Yui, Endo Shunsuke, Mizukami Tomoyuki, Yoshida Kenta, Kobayashi Masahiro, Hirajima Takao, Burgess Ray, Ballentine Chris

    Abstracts of Annual Meeting of the Geochemical Society of Japan   Vol. 64 ( 0 ) page: 36 - 36   2017

     More details

    Language:Japanese   Publishing type:Research paper (other academic)   Publisher:GEOCHEMICAL SOCIETY OF JAPAN  

    <p>The ubiquitous occurrence of sedimentary-pore-fluid-like halogens and noble gases in metamorphic rocks from the Sanbagawa belt is best explained by a model where water with a pore-fluid signature is incorporated into subducting oceanic lithosphere as serpentine along fracture zones developed at the outer rise and released to the mantle wedge associated with the serpentine dehydration without significant modification in the halogen and noble gas compositions.</p>

    DOI: 10.14862/geochemproc.64.0_36

    CiNii Research

  36. The thermal structure of the Sanbagawa subduction zone estimated by Raman carbonaceous material geothermometry in the Shiraga region, central Shikoku

    Sadamoto Kazushi, Wallis Simon, Kouketsu Yui, Mori Hiroshi, Nagaya Takayoshi, Ishii Kazuhiko

    Annual Meeting of the Geological Society of Japan   Vol. 2017 ( 0 ) page: 378 - 378   2017

     More details

    Language:Japanese   Publishing type:Research paper (other academic)   Publisher:The Geological Society of Japan  

    Program canceled for typhoon. However, This presentation was performed on the special session. This abstract is quotable and viewable on PDF.

    DOI: 10.14863/geosocabst.2017.0_378

    CiNii Research

  37. Formation of antigorite serpentinite: An example of the Kamabuseyama body in the Kanto Mountains

    Yokota Mari, Wallis Simon, Kouketsu Yui, Takagi Natsuko

    Annual Meeting of the Geological Society of Japan   Vol. 2017 ( 0 ) page: 379 - 379   2017

     More details

    Language:Japanese   Publishing type:Research paper (other academic)   Publisher:The Geological Society of Japan  

    Program canceled for typhoon. However, This presentation was performed on the special session. This abstract is quotable and viewable on PDF.

    DOI: 10.14863/geosocabst.2017.0_379

    CiNii Research

  38. 三波川帯白髪山地域におけるスラブ-マントル境界の剪断熱の評価

    纐纈 佑衣

    平成28年度深田研究助成   Vol. 24   page: 41 - 49   2017

     More details

    Language:Japanese   Publishing type:Research paper (bulletin of university, research institution)  

    CiNii Research

  39. Prograde evolution of Sulu UHP metamorphic rock in Yangzhuang, Junan region, deduced by combined Raman and petrological studies. Reviewed

    Taguchi Tomoki., Enami Masaki & Kouketsu Yui

    Journal of Metamorphic Geology   Vol. 34 ( 7 ) page: 683-696   2016.6

     More details

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

    DOI: 10.1111/jmg.12203

  40. Eocene to Oligocene retrogression and recrystallization of the Stak eclogite in northwest Himalaya Reviewed

    Kouketsu Yui, Hattori Kéiko, Guillot Stéphane, Rayner Nicole

    Lithos   Vol. 240-243   page: 155–166   2016.1

     More details

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

    DOI: 10.1016/j.lithos.2015.10.022

  41. Vitrinite reflectance and Raman spectra of carbonaceous material as indicators of frictional heating on faults: Constraints from friction experiments. Reviewed

    Furuichi Hiroyuki, Ujiie Kohtaro, Kouketsu Yui, Saito Tsubasa, Tsutsumi Akito, Wallis Simon

    Earth and Planetary Science Letters   Vol. 424   page: 191-200   2015.6

     More details

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

    DOI: 10.1016/j.epsl.2015.05.037

  42. Raman spectroscopic thermometry of carbonaceous material in chondrites: four-band fitting analysis and expansion of lower temperature limit Reviewed

    Homma Yoshitaka, Kouketsu Yui, Kagi Hiroyuki, Mikouchi Takashi, Yabuta Hikaru

    Journal of Mineralogical and Petrological Sciences   Vol. 110 ( 6 ) page: 276-282   2015

     More details

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

    DOI: 10.2465/jmps.150713a

  43. The influence of organic–rich shear zones on pelagic sediment deformation and seismogenesis in a subduction zone Reviewed

    Kameda Jun, Kouketsu Yui, Shimizu Mayuko, Yamaguchi Asuka, Hamada Yohei, Hamahashi Mari, Koge Hiroaki, Fukuchi Rina, Ikeda Masayuki, Kogure Toshihiro, Kimura Gaku

    Journal of Mineralogical and Petrological Sciences   Vol. 109 ( 5 ) page: 228-238   2014.10

     More details

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

    DOI: 10.2465/jmps.140403

  44. Composite metamorphic history recorded in garnet porphyroblasts of Sambagawa metasediments in the Besshi region, central Shikoku, Southwest Japan Reviewed

    Kouketsu Yui, Enami Masaki, Mouri Takashi, Okamura Mitsuya, Sakurai Tsuyoshi

    Island Arc   Vol. 23 ( 4 ) page: 263-280   2014

     More details

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

    DOI: 10.1111/iar.12075

  45. A new approach to develop the Raman carbonaceous material geothermometer for low-grade metamorphism using peak width Reviewed

    Kouketsu Yui, Mizukami Tomoyuki, Mori Hiroshi, Endo Shunsuke, Aoya Mutsuki, Hara Hidetoshi, Nakamura Daisuke, Wallis Simon

    Island Arc   Vol. 23   page: 33-50   2014

     More details

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

    DOI: 10.1111/iar.12057

  46. Evaluation of residual pressure in an inclusion-host system using negative frequency shift of quartz Raman spectra Reviewed

    Kouketsu Yui, Nishiyama Tadao, Ikeda Takeshi, Enami Masaki

    American Mineralogist   Vol. 99 ( 2-3 ) page: 433-442   2014

     More details

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

    DOI: 10.2138/am.2014.4427

  47. Calculated stabilities of sodic phases in the Sambagawa metapelites and their implications Reviewed

    Kouketsu Yui, Enami Masaki

    Journal of Metamorphic Geology   Vol. 29 ( 3 ) page: 301-316   2011

     More details

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

    DOI: 10.1111/j.1525-1314.2010.00919.x

  48. Extending the applicability of the Raman carbonaceous-material geothermometer using data from contact metamorphic rocks Reviewed

    Aoya Mutsuki, Kouketsu Yui, Endo Shunsuke, Shimizu Hitomi, Mizukami Tomoyuki, Nakamura Daisuke & Wallis Simon

    Journal of Metamorphic Geology   Vol. 28 ( 9 ) page: 895-914   2010.8

     More details

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

    DOI: 10.1111/j.1525-1314.2010.00896.x

  49. Omphacite-bearing metapelite from the Besshi region, Sambagawa metamorphic belt, Japan: Prograde eclogite facies metamorphism recorded in metasediment Reviewed

    Kouketsu Yui, Enami Masaki, Mizukami Tomoyuki

    Journal of Mineralogical and Petrological Sciences   Vol. 105   page: 9-19   2010

     More details

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

    DOI: 10.2465/jmps.090217

  50. Aragonite and omphacite-bearing metapelite from Besshi region, Sambagawa belt in central Shikoku, Japan and its implication Reviewed

    Kouketsu Yui, Enami Masaki

    Island Arc   Vol. 19 ( 1 ) page: 165-176   2010

     More details

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

    DOI: 10.1111/j.1440-1738.2009.00690.x

▼display all

MISC 2

  1. Quantitative analysis of trace elements in olivine with ICP-MS

    小坂由紀子, 加藤丈典, 道林克禎, 纐纈佑衣, 淺原良浩

    日本地球化学会年会要旨集(Web)   Vol. 67th   2020

     More details

  2. The formation process of calsitic skeleton of deep-sea isidid octocorals inferred from crystal orientation

    KOZAKA Yukiko, MICHIBAYASHI Katsuyoshi, KATO Takenori, KOUKETSU Yui, TOKUDA Yuki, SATO Hiroshi, IKEHARA Minoru

    極域科学シンポジウム(Web)   Vol. 11th   2020

     More details

Presentations 43

  1. 分光学と地質学のリンク Invited

    纐纈佑衣

    日本地質学会第128年学術大会名古屋大会 柵山雅則賞受賞記念講演  2021.9.5  日本地質学会

     More details

    Event date: 2021.9

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

    Venue:オンライン(Youtube)  

  2. Thermal structure near the continental Moho of subduction zone: Natural example of the Asemigawa region of the Sanbagawa metamorphic belt, SW Japan.

    Kouketsu. Y., Sadamoto, K., Umeda, H., Kawahara, H., Nagaya, T., Taguchi, T., Mori, H., Wallis, S. R., Enami, M.

    JpGU-AGU joint Meeting 2020 Virtual  2020.7.15 

     More details

    Event date: 2020.7

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

  3. ナノオーダーラマンマッピング -ザクロ石中の石英包有物の例-

    纐纈佑衣,松村太郎次郎,清水以知子

    変成岩などシンポジウム2022  2022.3.14 

     More details

    Event date: 2022.3

    Language:English   Presentation type:Oral presentation (general)  

    Venue:オンライン  

  4. ラマン地質圧力計における問題点の検証

    纐纈佑衣,冨岡優貴,西山忠男,榎並正樹

    日本鉱物科学会2021年年会  2021.9.16  日本鉱物科学会

     More details

    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン  

  5. 中部地方渋川地域に産する三波川結晶片岩類の研究

    冨岡優貴,纐纈佑衣,道林克禎

    日本鉱物科学会2021年年会  2021.9.17  日本鉱物科学会

     More details

    Event date: 2021.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:オンライン  

  6. マントル起源のカンラン石・蛇紋石に含まれるU・Th・PbのICP-MS定量分析結果

    加藤丈典,小坂由紀子,淺原良浩,纐纈佑衣,道林克禎

    日本鉱物科学会2021年年会  2021.9.17  日本鉱物科学会

     More details

    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:オンライン  

  7. 炭質物ラマン温度計の適用性と可能性 Invited

    纐纈佑衣

    日本地質学会第128年学術大会名古屋大会  2021.9.5  日本地質学会

     More details

    Event date: 2021.9

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

    Venue:オンライン(zoom)  

  8. Halogen and noble gas compositions of mantle wedge and subducted sediment, recorded in metamorphic rocks from the Sanbagawa belt International coauthorship International conference

    JIE REN, Hirochika Sumino, Yui Kouketsu, Simon Richard Wallis

    JpGU 2021  2021.6.5  Japan Geoscience Union

     More details

    Event date: 2021.5 - 2021.6

    Language:English   Presentation type:Oral presentation (general)  

    Venue:online  

  9. Rheological and metamorphic evolutions of high-grade Shimanto accretionary complex in Kerama islands, Ryukyu International conference

    Ippei Yamamoto, Yoshihiro Nakamura, Yumiko Harigane, Yui Kouketsu, Kenichiro Tani, Asuka Yamaguchi

    JpGU 2021  2021.6.6  Japan Geoscience Union

     More details

    Event date: 2021.5 - 2021.6

    Language:English   Presentation type:Oral presentation (general)  

    Venue:online  

  10. Detailed characteristics of Raman spectra of carbonaceous materials in fault rocks nearby the Median Tectonic Line International conference

    Hiroshi Mori, Yuki Nobe, Ken Yamaoka, Yosuke Tomooka, Yui Kouketsu, Tetsuya Tokiwa

    JpGU 2021  2021.6.6  Japan Geoscience Union

     More details

    Event date: 2021.5 - 2021.6

    Language:English   Presentation type:Poster presentation  

    Venue:online  

  11. Hidden intact coesite in deeply subducted rocks and its geological implications International conference

    Tomoki Taguchi, Yui Kouketsu, Yohei Igami, Tomoyuki Kobayashi, Akira Miyake

    JpGU 2021  2021.6.6  Japan Geoscience Union

     More details

    Event date: 2021.5 - 2021.6

    Language:English   Presentation type:Poster presentation  

    Venue:online  

  12. Strain in quartz inclusion probed by Raman spectroscopy International conference

    Yui Kouketsu, Yuki Tomioka, Tomoki Taguchi

    JpGU 2021  2021.6.6  Japan Geoscience Union

     More details

    Event date: 2021.5 - 2021.6

    Language:English   Presentation type:Poster presentation  

    Venue:online  

  13. Water content map of olivine using FT-IR method

    Hitomi Mizuno, Yui Kouketsu, Katsuyoshi Michibayashi

    2021.3.15 

     More details

    Event date: 2021.3

    Language:English   Presentation type:Poster presentation  

  14. Serpentinization history recorded in antigorite: A case study of the Shiraga serpentinites in the Sanbagawa metamorphic belt.

    Kouketsu, Y., Ando, K., Sakaguchi, I., Igami, Y., Miyake, A., Kawahara, H., Wallis, S.

    変成岩などシンポジウムオンライン  2020.11.24 

     More details

    Event date: 2020.11

    Language:Japanese   Presentation type:Poster presentation  

  15. 中部地方渋川地域三波川帯におけるヒスイ輝石産出の再確認

    塩谷輝, 道林克禎, 纐纈佑衣, 榎並正樹

    変成岩などシンポジウムオンライン  2020.11.24 

     More details

    Event date: 2020.11

    Language:Japanese   Presentation type:Oral presentation (general)  

  16. アンチゴライトに記録された蛇紋岩化の歴史:西南日本三波川変成帯白髪山地域の例

    纐纈佑衣, 安藤宏太, 坂口イロナ, 伊神洋平, 道林克禎

    日本鉱物科学会2020年オンライン年会  2020.9.16 

     More details

    Event date: 2020.9

    Language:Japanese  

  17. 石英-藍晶石系を用いたラマン地質圧力計:四国三波川帯・石英エクロジャイトの例

    冨岡優貴, 纐纈佑衣, 田口智樹

    日本鉱物科学会2020年オンライン年会  2020.9.16 

     More details

    Event date: 2020.9

    Language:Japanese   Presentation type:Oral presentation (general)  

  18. Petrological characteristics of serpentinized peridotites dredged from oceanic core complexes in the Shikoku Basin

    Segawa, I., Hirauchi, K., Ohara, Y., Kouketsu, Y., Michibayashi, K.

    JpGU-AGU joint Meeting 2020 Virtual  2020.7.14 

     More details

    Event date: 2020.7

    Language:English   Presentation type:Poster presentation  

  19. The Microstructure and Composition of Picrolitic Antigorite Veins in Serpentinites from the High-P Metamorphic Yuli Belt in Eastern Taiwan

    Sakaguchi, I. T., Kouketsu, Y., Tsai, C., Dewangga, D. D., Michibayashi, K.

    JpGU-AGU joint Meeting 2020 Virtual  2020.7.16 

     More details

    Event date: 2020.7

    Language:English   Presentation type:Poster presentation  

  20. The occurrence of jadeite in the ultramafic body discovered in the Sanbagawa belt, Shibukawa region, central Japan.

    Shioya, H., Michibayashi, K., Kouketsu, Y., Enami, M.

    JpGU-AGU joint Meeting 2020 Virtual  2020.7.16 

     More details

    Event date: 2020.7

    Language:English   Presentation type:Poster presentation  

  21. Raman spectroscopy of quartz eclogite in the Sanbagawa metamorphic belt: Potential of Raman geobarometry using kyanite-quartz system.

    Tomioka, Y., Kouketsu, Y., Taguchi, T.

    JpGU-AGU joint Meeting 2020 Virtual  2020.7.16 

     More details

    Event date: 2020.7

    Language:English   Presentation type:Poster presentation  

  22. The formation process of axial internode skeletons in deep-sea isidid octocorals inferred from crystal orientation

    Kozaka, Y., Michibayashi, K., Kouketsu, Y., Tokuda, Y., Sato, H.

    JpGU-AGU joint Meeting 2020 Virtual  2020.7.14 

     More details

    Event date: 2020.7

    Language:English   Presentation type:Poster presentation  

  23. 四国中央部三波川変成帯白髪山地域のアンチゴライトに記録された変成履歴の検証

    安藤宏太, 纐纈佑衣, 道林克禎

    日本地質学会第126年学術大会(2019山口)  2019.9.24 

     More details

    Event date: 2019.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:山口大学吉田キャンパス  

  24. 静岡県西部三波川帯「渋川超苦鉄質岩」の構造岩石学的研究とその起源

    塩谷輝, 道林克禎, 纐纈佑衣, 平内健一, 苗村康輔

    日本地質学会第126年学術大会(2019山口)  2019.9.24 

     More details

    Event date: 2019.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:山口大学吉田キャンパス  

  25. 四国中央部三波川帯汗見川地域に記録され たモホ不連続面近傍におけるスラブの温度構造及び変形構造

    纐纈佑衣, 貞本和志, 梅田隼人, 河原弘和, 永冶方敬, 田口知樹, 森宏, ウォリス サイモン, 榎並正樹

    日本地質学会第126年学術大会(2019山口)  2019.9.24 

     More details

    Event date: 2019.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:山口大学吉田キャンパス  

  26. ザクロ石中の相転移を伴わないコース石の発見とその意義:イタリア・西アルプスLago di Cignana Unitの例

    田口知樹, 纐纈佑衣, 伊神洋平, 三宅亮

    日本地質学会第126年学術大会(2019山口)  2019.9.24 

     More details

    Event date: 2019.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:山口大学吉田キャンパス  

  27. Attenuated Total Reflection infrared (ATR-IR) spectroscopy of serpentine minerals.

    Sakaguchi, I., Kouketsu, Y., Michibayashi, K., Wallis, S.

    2019.9.21 

     More details

    Event date: 2019.9

    Language:English   Presentation type:Poster presentation  

  28. SiO2相を含む蘇魯超高圧エクロジャイト中に産する定永閃石

    榎並正樹, 纐纈佑衣, 道林克禎, 田口知樹

    日本鉱物科学会2019年年会  2019.9.21 

     More details

    Event date: 2019.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:九州大学  

  29. Generation of high fluid pressure at the base of the shallow mantle wedge—evidence from serpentinite of the Sanbagawa belt, SW Japan International conference

    ウォリス サイモン、纐纈 佑衣、横田 麻莉

    日本地球惑星科学連合2019年大会 

     More details

    Event date: 2019.5

    Language:English   Presentation type:Oral presentation (general)  

    Venue:幕張メッセ   Country:Japan  

  30. Crystal orientation analysis of olivine in ultra-mylonite using TKDmethod: progress in spatial resolution from EBSD International conference

    Yohei Igami, Katsuyoshi Michibayashi, Kakihata Yuki, Yui Kouketsu

    Japan Geoscience Union Meeting 2019 

     More details

    Event date: 2019.5

    Language:English   Presentation type:Poster presentation  

    Venue:Makuhari Messe International Conference Hall   Country:Japan  

  31. Verification of damage by polishing of sheet-like minerals International conference

    Yui Kouketsu, Kota Ando, Katsuyoshi Michibayashi

    Japan Geoscience Union Meeting 2019 

     More details

    Event date: 2019.5

    Language:English   Presentation type:Poster presentation  

    Venue:Makuhari Messe International Conference Hall   Country:Japan  

  32. Antigorite Raman spectrum: a case study in Shiraga region of thecentral Shikoku, Sanbagawa metamorphic belt, SW Japan International conference

    Kota Ando, Yui Kouketsu, Katsuyoshi Michibayashi

    Japan Geoscience Union Meeting 2019 

     More details

    Event date: 2019.5

    Language:English   Presentation type:Poster presentation  

    Venue:Makuhari Messe International Conference Hall   Country:Japan  

  33. Static stage of exhumation of metamorphic rocks recorded in garnets: Evidence of EBSD-EPMA mapping International conference

    Yui Kouketsu

    2018 AGU Fall Meeting 

     More details

    Event date: 2018.12

    Language:English   Presentation type:Poster presentation  

    Venue:Washington DC   Country:United States  

  34. 顕微⾚外分光測定におけるATR法を⽤いた鉱物中の⽔の検出可能性の検証

    纐纈 佑⾐, 柿畑 優季, 清⽔ 健⼆, 道林 克禎, Wallis Simon

    ⽇本鉱物科学会2018年会 

     More details

    Event date: 2018.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:山形大学 小白川キャンパス   Country:Japan  

  35. Wide variety of crystallinity of carbonaceous materials in metasedimentary schists in the Yuli belt, eastern Taiwan International conference

    Yui Kouketsu, Chih Ying Yeh, Chin Ho Tsai, Masaki Enami

    Japan Geoscience Union Meeting 2018  

     More details

    Event date: 2018.5

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Makuhari Messe International Conference Hall   Country:Japan  

  36. Effect of shearing by polishing on the crystallinity of graphite International conference

    Yui Kouketsu, Masaki Enami, Akira Miyake, Tomoki Taguchi, Yohei Igami, Hiroyuki Kagi

    Japan Geoscience Union Meeting 2018  

     More details

    Event date: 2018.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:Makuhari Messe International Conference Hall   Country:Japan  

  37. ラマン炭質物温度計を用いた三波川沈み込み帯の温度構造決 定:四国中央部白髪山地域の例 International conference

    貞本和志・ウォリス サイモ ン・纐纈佑衣・森 宏・永冶方敬・石井和彦

    日本地質学会第124年学術大会(2017愛媛大会) 

     More details

    Event date: 2017.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:愛媛大学城北キャンパス   Country:Japan  

  38. Detection of frictional heating on faults using Raman spectra of carbonaceous material International conference

    Kohtaro Ujiie, Hiroki Tabata, Yui Kouketsu, Hiroyuki Kagi, Weiren Lin

    Japan Geoscience Union Meeting 2016 

     More details

    Event date: 2016.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:Makuhari Messe, Chiba   Country:Japan  

  39. Maturity evaluation of source rocks using Raman and fluorescence spectroscopy International conference

    Mao Watanabe, Hiroyuki Kagi, Shigenori Ogihara, Yui Kouketsu, Fumiaki Okumura, Hirotsugu Iwano, Amane Waseda

    Japan Geoscience Union Meeting 2016 

     More details

    Event date: 2016.5

    Language:Japanese   Presentation type:Poster presentation  

    Venue:Makuhari Messe, Chiba   Country:Japan  

  40. 龍門山断層帯における炭質物のラマン分光分析

    纐纈佑衣, 清水以知子, Lu Yao, Shengli Ma, 嶋本利彦

    日本地質学会第122年学術大会(長野大会) 

     More details

    Event date: 2015.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  41. Construction of Raman geothermobarometer using aluminosilicate minerals in garnet porphyroblast International conference

    Kouketsu Yui, Taguchi Tomoki

    Japan Geoscience Union Meeting 2015 

     More details

    Event date: 2015.5

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  42. Raman spectroscopic analysis of carbonaceous material included in oil source rocks International conference

    Kouketsu Yui, Okumura Fumiaki, Iwano Hirotsugu, Waseda Amane, Kagi Hiroyuki

    Japan Geoscience Union Meeting 2015 

     More details

    Event date: 2015.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  43. Raman spectroscopic analysis of carbonaceous material in Longmenshan fault zone at Shenxigou International conference

    Kouketsu Yui, Shimizu Ichiko, Yao Lu, Ma Shengli, Shimamoto Toshihiko

    Japan Geoscience Union Meeting 2015  

     More details

    Event date: 2015.5

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

▼display all

KAKENHI (Grants-in-Aid for Scientific Research) 7

  1. ラマン地質圧力計の熱水ダイヤモンドアンビルセルを用いた実験的研究

    Grant number:22H01333  2022.4 - 2026.3

    科学研究費助成事業  基盤研究(B)

    纐纈 佑衣

      More details

    Authorship:Principal investigator 

    Grant amount:\17290000 ( Direct Cost: \13300000 、 Indirect Cost:\3990000 )

  2. Metamorphic rocks in Corsica Island: Key to understanding megathrust slip in cold subduction zones

    Grant number:20KK0078  2020.10 - 2024.3

    Grants-in-Aid for Scientific Research  Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))

      More details

    Authorship:Coinvestigator(s) 

  3. Estimating subduction boundary stresses and incorporation in next-generation modeling

    Grant number:21H01188  2021.4 - 2026.3

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

      More details

    Authorship:Coinvestigator(s) 

  4. Elucidation of the mantle deformation environment by developing a quantitative measurement of water content in olivine

    Grant number:20K14578  2020.4 - 2023.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Early-Career Scientists

      More details

    Authorship:Principal investigator 

    Grant amount:\4160000 ( Direct Cost: \3200000 、 Indirect Cost:\960000 )

  5. 高圧ー超高圧変成岩に適用可能な新しいラマン地質圧力計の開発

    Grant number:19K04037  2019.4 - 2022.3

    日本学術振興会  科学研究費助成事業  基盤研究(C)

    田口 知樹, 纐纈 佑衣

      More details

    Authorship:Coinvestigator(s) 

    岩石に記録された圧力情報は、地球内部で起こる様々な地球科学現象を解読する上で必須データである。岩石の形成圧力見積もりは熱力学モデルを用いた計算が主である。しかし、天然の岩石は複雑な系であり、不確定要素を多く含む熱力学的変数を用いた圧力解析のみで、岩石の形成圧力値を正確かつ簡便に決定することには限界がある。本研究では、藍晶石内に存在するシリカ包有物の「残留圧力」に焦点を当てる。特に、残留圧力の方位異方性を考慮した解析と理論的な数値計算モデリングを行い、様々な環境で形成された高圧-超高圧変成岩の圧力条件を迅速・簡便・精密に決定できる「新しいラマン地質圧力計」の開発を目指す。
    岩石が経験した温度圧力値を見積もる地質温度圧力計は、鉱物化学組成を用いた熱力学モデルが広く用いられている。しかし、この手法は各鉱物の熱力学データが必須であり、そのデータが不十分な鉱物も存在する。また、特定の鉱物共生にしか適用できないこともあり、温度圧力条件の見積もりが難しい岩石も多い。本研究では、藍晶石内に存在するシリカ包有物の残留圧力に焦点を当て、ラマン分光分析に基づく新たな地質圧力計の開発に取り組んでいる。
    初年度に引き続き、石英包有物が保持する残留圧力値のばらつきについて、その原因特定を目指した。石英のラマンスペクトルを対象に、新たなソフトウェアを用いて、ピーク解析および残留圧力の再計算を実施した。その結果、昨年度に得られた解析値と大きな誤差が生じないことを確認した。しかし、昇温変成作用時に包有された石英だけでなく、クラックヒーリングにより形成されたと考えられる低残留圧力の石英も確認した。これは残留圧力のばらつきを生む原因の一つと示唆される。また、イタリア産の超高圧変成岩中のシリカ鉱物(コース石)に焦点を当て、その結晶内の残留圧力分布とナノレベルの界面観察を実施し、超高圧鉱物の保持機構やその地質学的意義についてまとめた。
    2020年4月付けで、研究代表者(田口)が京都大学から早稲田大学へ異動した。研究室主催者として独立したばかりであることや新型コロナウイルス感染症の影響もあり、実験室立ち上げが鈍化傾向にある。また、外部研究機関への分析を目的とした出張についても大きく制限されたため、当初予定していた実験の多くを延期した。しかし、これまでに得られた成果をまとめ査読付き国際誌へ投稿したこと、および本研究課題と関連する成果が論文として公表されたことから、研究自体はおおむね順調に進展したと判断される。
    これまでに得られたデータをまとめ、藍晶石-シリカ包有物系の地質圧力計の確立を目指す。ラマン分析や透過型電子顕微鏡による観察を実施し、藍晶石およびシリカ鉱物の結晶学的データの取得を進める。しかし、新型コロナウイルスの感染者数が再び増加傾向にあり、最終年度も当初の研究計画通りに進行できない可能性が高い。感染状況を注視しつつ、最終年度の総括を推進する。

  6. A new approach to the study of metamorphic rocks by combining EPMA and EBSD

    Grant number:17K05705  2017.4 - 2021.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    Enami Masaki

      More details

    Authorship:Coinvestigator(s) 

    The purpose of this study was to propose and validate a new method for studying metamorphic rocks by combining an electron probe microanalyzer (EPMA) and an electron backscatter diffraction (EBSD) system.
    We will focus on the following topics: 1) Detection of polycrystalline garnet porphyroblast in eclogite, 2) deciphering the deformation characteristics during exhumation stage recorded by garnet porphyroblast in metamorphic rocks formed under various pressure-temperature conditions, and 3) elucidation of the formation process of amphibole grains, which occur as pseudomorphs after garnet and omphacite in amphibolitized eclogites. In particular, we discuss the reasons for the formation of Si-poor amphibole in SiO2-saturated rocks.

  7. Elucidation of the mantle convection pattern in the shallow part of the subduction zone using natural samples

    Grant number:16K17820  2016.4 - 2019.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Young Scientists (B)

    Kouketsu Yui, Simon Wallis, Enami Masaki, Ho Tsai Chin

      More details

    Authorship:Principal investigator 

    Grant amount:\3900000 ( Direct Cost: \3000000 、 Indirect Cost:\900000 )

    Samples of metapelites and serpentinites in the Shirahata area, central Shikoku, SW Japan were collected and analyzed using Raman spectroscopy. The temperature structure near the slab-mantle boundary was verified using a Raman carbonaceous material geothermometer, and no significant temperature increase was confirmed. As compared with the thermal model calculation, it was concluded that the shear stress at the shallow slab-mantle boundary is several tens MPa or less. The low shear stress suggests that the degree of coupling at the slab-mantle boundary in the Sanbagawa belt is low, and the mantle convection is considered to be weak or stagnant.

▼display all

 

Teaching Experience (On-campus) 24

  1. Field Seminar I

    2021

     詳細を見る

    The aim of this course is to help students acquire the necessary skill and knowledge needed to understand earth scientific phenomena in a field.

  2. Geology

    2021

     詳細を見る

    The aim of this course is to help students acquire the basic knowledge of geology of Japan and understand geologic phenomena in a subduction zone.

  3. Petrology Experiments

    2021

     詳細を見る

    Field and microscopic observation is the most basic observation method in petrology, structural geology, and sedimentology. In this experiment, we will conduct practical training focusing on each of these fields. Several field trips will be conducted, and simple analysis of data will be acquired through laboratory experiments. The goal of this class is for students to acquire the basics of petrological experimental methods in a broad sense and to deepen their understanding of this field by analyzing the tissue and measurement data they observe in the field and in the laboratory.

  4. Science of Earth and Planets

    2021

     詳細を見る

    The aim of the course category is to develop the ability to analyze and understand various phenomena in the natural sciences in an interdisciplinary and comprehensive manner, and to understand the relationship between these phenomena and other academic fields.
    The purpose of this course is to acquire basic knowledge about the origin and current state of our planet, the Earth, and to comprehensively understand it using physics, chemistry, and biology. The course will cover the birth of the universe, the formation of the solar system, the birth of the earth, and the subsequent changes in the rocks, minerals, and biological fossils found on the earth, by moving the scope from large to small scales of the objects and phenomena.

  5. Seminar on Geology and Geobiology

    2020

     詳細を見る

    The aim of this course is to help students acquire the necessary skills and knowledge needed to solve global issues from the viewpoint of geology and acquire the ability to create new academic fields for the next generation.
    This course is to help students acquire the abilities to understand the problem and significance of the scientific papers in relation to your research, when you read some papers.

  6. Geology

    2020

  7. Field Seminar I

    2020

  8. Geology Experiments

    2020

  9. Petrology Experiments

    2020

  10. Petrology Experiments

    2019

  11. Geology Experiments

    2019

  12. Geology

    2019

  13. Field Seminar I

    2019

  14. Geology

    2018

  15. Earth and Planetary Science Seminar I

    2018

  16. Geology Experiments

    2018

  17. Field Seminar I

    2018

  18. Field Seminar I

    2017

  19. Introduction to Earth and Planetary Sciences

    2017

  20. Geology Experiments

    2017

  21. Geology

    2017

  22. Geology Experiments

    2016

  23. Earth and Planetary Science Seminar I

    2015

  24. 地質学実験

    2015

▼display all

Teaching Experience (Off-campus) 6

  1. Science of Earth and Planets

    2021.4 - 2021.7 Nagoya University)

  2. Petrology Experiments

    2019.4 Nagoya University)

  3. Field Seminar I

    2018.4 Nagoya University)

  4. Geology

    2017.10 Nagoya University)

  5. Introduction to Earth and Planetary Sciences

    2017.4 - 2017.7 Nagoya University)

  6. Geology Experiments

    2015.4 Nagoya University)

▼display all

 

Social Contribution 1

  1. 名古屋大学キャリア講演会

    Role(s):Lecturer

    三重県立桑名高等学校  2021.7