Updated on 2023/05/15

写真a

 
SETO YUSUKE
 
Organization
Graduate School of Science Department of Geosciences Associate Professor
School of Science Department of Geosciences
Title
Associate Professor
Affiliation
Institute of Science
Affiliation campus
Sugimoto Campus

Position

  • Graduate School of Science Department of Geosciences 

    Associate Professor  2022.04 - Now

  • School of Science Department of Geosciences 

    Associate Professor  2022.04 - Now

Degree

  • 博士(理学) ( Kyoto University )

Research Areas

  • Natural Science / Space and planetary sciences

  • Natural Science / Solid earth sciences

Research Interests

  • 鉱物

Professional Memberships

  • 日本高圧力学会

    2005.09 - Now

  • 日本鉱物科学会

    2000.08 - Now

  • 日本地球惑星科学連合

    2000.04 - Now

Committee Memberships (off-campus)

  • Elements幹事   日本鉱物科学会  

    2022.08 - Now 

  • 庶務幹事   日本高圧力学会  

    2021.09 - Now 

  • 行事幹事   日本鉱物科学会  

    2021.08 - Now 

  • 会計幹事   日本高圧力学会  

    2014.09 - 2016.08 

Awards

  • 奨励賞

    2015.09   日本鉱物科学会  

  • 奨励賞

    2011.11   日本高圧力学会  

  • 論文賞

    2008.09   日本鉱物科学会  

Job Career (off-campus)

  • Osaka Metropolitan University   Graduate School of Science, Department of Geosciences

    2022.04 - Now

  • Kobe University   Graduate School of Science

    2014.08 - 2022.03

Education

  • Kyoto University   The second semester of doctoral program   Graduated/Completed

    2002.04 - 2005.03

Papers

  • Nonequilibrium Spherulitic Magnetite In The Ryugu Samples Reviewed

    Elena Dobrică, Hope A. Ishii, John P. Bradley, Kenta Ohtaki, Adrian J. Brearley, Takaaki Noguchi, Toru Matsumoto, Akira Miyake, Yohei Igami, Mitsutaka Haruta, Hikaru Saito, Satoshi Hata, Yusuke Seto, Masaaki Miyahara, Naotaka Tomioka, Hugues Leroux, Corentin Le Guillou, Damien Jacob, Francisco de la Peña, Sylvain Laforet, Maya Marinova, Falko Langenhorst, Dennis Harries, Pierre Beck, Thi H. V. Phan, Rolando Rebois, Neyda M. Abreu, Jennifer Gray, Thomas Zega, Pierre-M. Zanetta, Michelle S. Thompson, Rhonda Stroud, Kate Burgess, Brittany A. Cymes, John C. Bridges, Leon Hicks, Martin R. Lee, Luke Daly, Phil A. Bland, Michael E. Zolensky, David R. Frank, James Martinez, Akira Tsuchiyama, Masahiro Yasutake, Junya Matsuno, Shota Okumura, Itaru Mitsukawa, Kentaro Uesugi, Masayuki Uesugi, Akihisa Takeuchi, Mingqi Sun, Satomi Enju, Aki Takigawa, Tatsuhiro Michikami, Tomoki Nakamura, Megumi Matsumoto, Yusuke Nakauchi, Hisayoshi Yurimoto, Ryuji Okazaki, Hikaru Yabuta, Hiroshi Naraoka, Kanako Sakamoto, Shogo Tachibana, Toru Yada, Masahiro Nishimura, Aiko Nakato, Akiko Miyazaki, Kasumi Yogata, Masanao Abe, Tatsuaki Okada, Tomohiro Usui, Makoto Yoshikawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Satoru Nakazawa, Sei-ichiro Watanabe, Yuichi Tsuda

    Geochimica et Cosmochimica Acta   346   65 - 75   2023.02( ISSN:0016-7037

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    Publishing type:Research paper (scientific journal)  

    We have investigated several particles collected during each of two touchdowns of the Hayabusa2 spacecraft at the surface of the C-type asteroid 162173 Ryugu using various electron microscope techniques. Our detailed transmission electron microscopy study shows the presence of magnetite with various morphologies coexisting in close proximity. This is characteristic of CI chondrite-like materials and consistent with the mineral assemblages and compositions in the Ryugu parent body. We describe the microstructural characteristics of magnetite with different morphologies, which could have resulted from the chemical conditions (growth vs. diffusion rate) during their formation. Furthermore, we describe the presence of magnetites with a spherulitic structure composed of individual radiating fibers that are characterized by pervasive, homogeneously distributed euhedral to subhedral pores that have not been described in previous chondrite studies. This particular spherulitic structure is consistent with crystallization under nonequilibrium conditions. Additionally, the presence of a high density of defects within the magnetite fibers, the high surface/volume ratio of this morphology, and the presence of amorphous materials in several pores and at the edges of the acicular fibers further support their formation under nonequilibrium conditions. We suggest that the growth processes that lead to this structure result from the solution reaching a supersaturated state, resulting in an adjustment to a lower free energy condition via nucleation and rapid growth.

    DOI: 10.1016/j.gca.2023.02.003

  • 3D morphological variability in foraminifera unravel environmental changes in the Baltic Sea entrance over the last 200 years

    Choquel C.

    Frontiers in Earth Science   11   2023

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  • A history of mild shocks experienced by the regolith particles on hydrated asteroid Ryugu

    Tomioka N.

    Nature Astronomy   2023

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  • A dehydrated space-weathered skin cloaking the hydrated interior of Ryugu Reviewed International coauthorship

    Takaaki Noguchi, Toru Matsumoto, Akira Miyake, Yohei Igami, Mitsutaka Haruta, Hikaru Saito, Satoshi Hata, Yusuke Seto, Masaaki Miyahara, Naotaka Tomioka, Hope A. Ishii, John P. Bradley, Kenta K. Ohtaki, Elena Dobrică, Hugues Leroux, Corentin Le Guillou, Damien Jacob, Francisco de la Peña, Sylvain Laforet, Maya Marinova, Falko Langenhorst, Dennis Harries, Pierre Beck, Thi H. V. Phan, Rolando Rebois, Neyda M. Abreu, Jennifer Gray, Thomas Zega, Pierre-M. Zanetta, Michelle S. Thompson, Rhonda Stroud, Kate Burgess, Brittany A. Cymes, John C. Bridges, Leon Hicks, Martin R. Lee, Luke Daly, Phil A. Bland, Michael E. Zolensky, David R. Frank, James Martinez, Akira Tsuchiyama, Masahiro Yasutake, Junya Matsuno, Shota Okumura, Itaru Mitsukawa, Kentaro Uesugi, Masayuki Uesugi, Akihisa Takeuchi, Mingqi Sun, Satomi Enju, Aki Takigawa, Tatsuhiro Michikami, Tomoki Nakamura, Megumi Matsumoto, Yusuke Nakauchi, Masanao Abe, Masahiko Arakawa, Atsushi Fujii, Masahiko Hayakawa, Naru Hirata, Naoyuki Hirata, Rie Honda, Chikatoshi Honda, Satoshi Hosoda, Yu-ichi Iijima, Hitoshi Ikeda, Masateru Ishiguro, Yoshiaki Ishihara, Takahiro Iwata, Kousuke Kawahara, Shota Kikuchi, Kohei Kitazato, Koji Matsumoto, Moe Matsuoka, Yuya Mimasu, Akira Miura, Tomokatsu Morota, Satoru Nakazawa, Noriyuki Namiki, Hirotomo Noda, Rina Noguchi, Naoko Ogawa, Kazunori Ogawa, Tatsuaki Okada, Chisato Okamoto, Go Ono, Masanobu Ozaki, Takanao Saiki, Naoya Sakatani, Hirotaka Sawada, Hiroki Senshu, Yuri Shimaki, Kei Shirai, Seiji Sugita, Yuto Takei, Hiroshi Takeuchi, Satoshi Tanaka, Eri Tatsumi, Fuyuto Terui, Ryudo Tsukizaki, Koji Wada, Manabu Yamada, Tetsuya Yamada, Yukio Yamamoto, Hajime Yano, Yasuhiro Yokota, Keisuke Yoshihara, Makoto Yoshikawa, Kent Yoshikawa, Ryohta Fukai, Shizuho Furuya, Kentaro Hatakeda, Tasuku Hayashi, Yuya Hitomi, Kazuya Kumagai, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Hiromichi Soejima, Ayako I. Suzuki, Tomohiro Usui, Toru Yada, Daiki Yamamoto, Kasumi Yogata, Miwa Yoshitake, Harold C. Connolly Jr, Dante S. Lauretta, Hisayoshi Yurimoto, Kazuhide Nagashima, Noriyuki Kawasaki, Naoya Sakamoto, Ryuji Okazaki, Hikaru Yabuta, Hiroshi Naraoka, Kanako Sakamoto, Shogo Tachibana, Sei-ichiro Watanabe & Yuichi Tsuda

    2022.12

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    International / domestic magazine:International journal  

    DOI: 10.1038/s41550-022-0

  • A dehydrated space-weathered skin cloaking the hydrated interior of Ryugu

    Takaaki Noguchi, Toru Matsumoto, Akira Miyake, Yohei Igami, Mitsutaka Haruta, Hikaru Saito, Satoshi Hata, Yusuke Seto, Masaaki Miyahara, Naotaka Tomioka, Hope A. Ishii, John P. Bradley, Kenta K. Ohtaki, Elena Dobrică, Hugues Leroux, Corentin Le Guillou, Damien Jacob, Francisco de la Peña, Sylvain Laforet, Maya Marinova, Falko Langenhorst, Dennis Harries, Pierre Beck, Thi H. V. Phan, Rolando Rebois, Neyda M. Abreu, Jennifer Gray, Thomas Zega, Pierre-M. Zanetta, Michelle S. Thompson, Rhonda Stroud, Kate Burgess, Brittany A. Cymes, John C. Bridges, Leon Hicks, Martin R. Lee, Luke Daly, Phil A. Bland, Michael E. Zolensky, David R. Frank, James Martinez, Akira Tsuchiyama, Masahiro Yasutake, Junya Matsuno, Shota Okumura, Itaru Mitsukawa, Kentaro Uesugi, Masayuki Uesugi, Akihisa Takeuchi, Mingqi Sun, Satomi Enju, Aki Takigawa, Tatsuhiro Michikami, Tomoki Nakamura, Megumi Matsumoto, Yusuke Nakauchi, Masanao Abe, Masahiko Arakawa, Atsushi Fujii, Masahiko Hayakawa, Naru Hirata, Naoyuki Hirata, Rie Honda, Chikatoshi Honda, Satoshi Hosoda, Yu-ichi Iijima, Hitoshi Ikeda, Masateru Ishiguro, Yoshiaki Ishihara, Takahiro Iwata, Kousuke Kawahara, Shota Kikuchi, Kohei Kitazato, Koji Matsumoto, Moe Matsuoka, Yuya Mimasu, Akira Miura, Tomokatsu Morota, Satoru Nakazawa, Noriyuki Namiki, Hirotomo Noda, Rina Noguchi, Naoko Ogawa, Kazunori Ogawa, Tatsuaki Okada, Chisato Okamoto, Go Ono, Masanobu Ozaki, Takanao Saiki, Naoya Sakatani, Hirotaka Sawada, Hiroki Senshu, Yuri Shimaki, Kei Shirai, Seiji Sugita, Yuto Takei, Hiroshi Takeuchi, Satoshi Tanaka, Eri Tatsumi, Fuyuto Terui, Ryudo Tsukizaki, Koji Wada, Manabu Yamada, Tetsuya Yamada, Yukio Yamamoto, Hajime Yano, Yasuhiro Yokota, Keisuke Yoshihara, Makoto Yoshikawa, Kent Yoshikawa, Ryohta Fukai, Shizuho Furuya, Kentaro Hatakeda, Tasuku Hayashi, Yuya Hitomi, Kazuya Kumagai, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Hiromichi Soejima, Ayako I. Suzuki, Tomohiro Usui, Toru Yada, Daiki Yamamoto, Kasumi Yogata, Miwa Yoshitake, Harold C. Connolly, Dante S. Lauretta, Hisayoshi Yurimoto, Kazuhide Nagashima, Noriyuki Kawasaki, Naoya Sakamoto, Ryuji Okazaki, Hikaru Yabuta, Hiroshi Naraoka, Kanako Sakamoto, Shogo Tachibana, Sei-ichiro Watanabe, Yuichi Tsuda

    Nature Astronomy   7 ( 2 )   170 - 181   2022.12

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    Publishing type:Research paper (scientific journal)  

    Abstract

    Without a protective atmosphere, space-exposed surfaces of airless Solar System bodies gradually experience an alteration in composition, structure and optical properties through a collective process called space weathering. The return of samples from near-Earth asteroid (162173) Ryugu by Hayabusa2 provides the first opportunity for laboratory study of space-weathering signatures on the most abundant type of inner solar system body: a C-type asteroid, composed of materials largely unchanged since the formation of the Solar System. Weathered Ryugu grains show areas of surface amorphization and partial melting of phyllosilicates, in which reduction from Fe<sup>3+</sup> to Fe<sup>2+</sup> and dehydration developed. Space weathering probably contributed to dehydration by dehydroxylation of Ryugu surface phyllosilicates that had already lost interlayer water molecules and to weakening of the 2.7 µm hydroxyl (–OH) band in reflectance spectra. For C-type asteroids in general, this indicates that a weak 2.7 µm band can signify space-weathering-induced surface dehydration, rather than bulk volatile loss.

    DOI: 10.1038/s41550-022-01841-6

    Other URL: https://www.nature.com/articles/s41550-022-01841-6

  • Crystallinity in periodic nanostructure surface on Si substrates induced by near- and mid-infrared femtosecond laser irradiation Reviewed

    Reina Miyagawa, Daisuke Kamibayashi, Hirotaka Nakamura, Masaki Hashida, Heishun Zen, Toshihiro Somekawa, Takeshi Matsuoka, Hiroyuki Ogura, Daisuke Sagae, Yusuke Seto, Takahisa Shobu, Aki Tominaga, Osamu Eryu & Norimasa Ozaki

    2022.12

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    Publishing type:Research paper (scientific journal)   International / domestic magazine:International journal  

    DOI: 10.1038/s41598-022-2

  • Crystallinity in periodic nanostructure surface on Si substrates induced by near- and mid-infrared femtosecond laser irradiation Reviewed

    Reina Miyagawa, Daisuke Kamibayashi, Hirotaka Nakamura, Masaki Hashida, Heishun Zen, Toshihiro Somekawa, Takeshi Matsuoka, Hiroyuki Ogura, Daisuke Sagae, Yusuke Seto, Takahisa Shobu, Aki Tominaga, Osamu Eryu, Norimasa Ozaki

    Scientific Reports   12 ( 1 )   2022.12

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    Publishing type:Research paper (scientific journal)  

    Abstract

    Laser-induced periodic surface structure (LIPSS), which has a period smaller than the laser wavelength, is expected to become a potential technique for fine surface processing. We report the microscopic and macroscopic observations of the crystallinity of LIPSSs, where the characteristics such as defects generation and residual strain were analyzed, respectively. The LIPSSs were formed on a Si substrate using two different femtosecond pulses from Ti:Sapphire laser with near-infrared wavelength (0.8 μm) and free-electron laser (FEL) with mid-infrared wavelength (11.4 μm). The photon energies of the former and latter lasers used here are higher and lower than the Si bandgap energies, respectively. These LIPSSs exhibit different crystalline states, where LIPSS induced by Ti:Sapphire laser show residual strain while having a stable crystallinity; in contrast, FEL-LIPSS generates defects without residual strain. This multiple analysis (microscopic and macroscopic observations) provides such previously-unknown structural characteristics with high spatial resolution. To obtain LIPSS with suitable properties and characteristics based on each application it is paramount to identify the laser sources that can achieve such properties. Therefore, identifying the structural information of the LIPSS generated by each specific laser is of great importance.

    DOI: 10.1038/s41598-022-25365-1

    Other URL: https://www.nature.com/articles/s41598-022-25365-1

  • High-pressure polymorphs in bulk silicon formed at relativistic laser intensity Reviewed

    Andrei Rode, Ludovic Rapp, Takeshi Matsuoka, Konstantin Firestein, Daisuke Sagae, Hideaki Habara, Keiichiro Mukai, Kazuo Tanaka, Eugene Gamaly, Ryosuke Kodama, Yusuke Seto, Takahisa Shobu, Aki Tominaga, Lachlan Smillie, Tatiana Pikuz, Bianca Haberl, Toshinori Yabuuchi, Tadashi Togashi Tadashi Togashi, Yuichi Inubushi, Makina Yabashi, Saulius Juodkazis, Dmitri Golberg, Norimasa Ozaki

    2022.11

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    Abstract

    Silicon polymorphs with exotic electronic and optical properties have recently attracted significant attention due to the wide range of useful bandgap characteristics1,2,3,4. They are typically formed by high pressure techniques, which put limitations on the sample volumes and their crystal structure5,6,7,8,9,10. This constitutes a major obstacle to study these polymorphs and their incorporation into existing technology. Here, we report on a new approach to create unusual crystal structures deep into the bulk of a silicon wafer by MeV-electrons generated by laser irradiation at ultra-relativistic intensity above ~2x10^18 W/cm2. Strong repulsion between the electrons, their branching due to self-generated magnetic field and nonlinear relativistic effects11,12,13 enhance deposition of their energy deep into the target and form high energy density conditions leading to ionisation, followed by fast quenching and restructuring into new crystal arrangements14,15,16,17,18. Analysis by Raman spectroscopy, synchrotron X-ray diffraction, and high-resolution transmission electron microscopy of nanocrystals formed in the irradiated samples provide compelling evidence of the formation of metastable Si phases. The unexplored domain of material transformations exposed to laser-produced MeV-electrons opens new pathways for the conversion into new crystal structures applicable to a wide range of materials at considerably larger quantity, all preserved for further studies and exploitation.

    DOI: 10.21203/rs.3.rs-2060424/v1

    Other URL: https://www.researchsquare.com/article/rs-2060424/v1.html

  • Phase transition and melting in zircon by nanosecond shock loading Reviewed

    Sota Takagi, Kouhei Ichiyanagi, Atsushi Kyono, Nobuaki Kawai, Shunsuke Nozawa, Norimasa Ozaki, Yusuke Seto, Takuo Okuchi, Souma Nitta, Satoru Okada, Kohei Miyanishi, Keiichi Sueda, Tadashi Togashi, Toshinori Yabuuchi

    Physics and Chemistry of Minerals   49 ( 5 )   2022.05( ISSN:0342-1791

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1007/s00269-022-01184-8

    Other URL: https://link.springer.com/article/10.1007/s00269-022-01184-8/fulltext.html

  • <i>ReciPro</i>: free and open-source multipurpose crystallographic software integrating a crystal model database and viewer, diffraction and microscopy simulators, and diffraction data analysis tools Reviewed

    Yusuke Seto, Masahiro Ohtsuka

    Journal of Applied Crystallography   55 ( 2 )   397 - 410   2022.04( ISSN:1600-5767

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

    <italic>ReciPro</italic> is a comprehensive multipurpose crystallographic program equipped with an intuitive graphical user interface (GUI), and it is completely free and open source. This software has a built-in crystal database consisting of over 20 000 crystal models, and the visualization system can seamlessly display a specified crystal model as an attractive three-dimensional graphic. The comprehensive features are not confined to these crystal model databases and viewers. It can smoothly and quantitatively simulate not only single-crystal and/or polycrystalline (powder) diffraction patterns of X-ray, electron and neutron diffraction of a selected crystal model, based on the kinematic scattering theory, but also various electron diffraction patterns and high-resolution transmission electron microscopy (TEM) images, based on the dynamical scattering theory. The features of stereographic projection of crystal planes/axes to explore crystal orientation relationships and the semi-automatic diffraction spot indexing function for experimental diffraction patterns assist diffraction experiments and analyses. These features are linked through a user-friendly GUI, and the results can be synchronously displayed almost in real time. <italic>ReciPro</italic> will assist a wide range of crystallographers (including beginners) using X-ray, electron and neutron diffraction crystallography and TEM.

    DOI: 10.1107/s1600576722000139

  • Hugoniot equation-of-state and structure of laser-shocked polyimide C22H10N2O5 Reviewed

    K. Katagiri, N. Ozaki, D. Murayama, K. Nonaka, Y. Hironaka, Y. Inubushi, K. Miyanishi, H. Nakamura, T. Okuchi, T. Sano, Y. Seto, K. Shigemori, K. Sueda, T. Togashi, Y. Umeda, M. Yabashi, T. Yabuuchi, R. Kodama

    Physical Review B   105 ( 5 )   2022.02( ISSN:2469-9950

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    The Hugoniot equation-of-state, Grüneisen parameter, and structure of laser-shocked polyimide were measured. The polyimide Hugoniots were measured in the pressure range 80-600 GPa and found to be consistent with the extrapolation of previously reported data below 60 GPa. The structural measurements of polyimide shock compressed to pressures of 28-163 GPa were performed using the in situ x-ray diffraction technique, and the results show that the melting pressure of polyimide along its Hugoniot is below 32(±3) GPa, indicating that the discontinuous volume change of the polyimide Hugoniot at ∼26 GPa observed in previous gas-gun experiments denotes the onset of melting. The consistency of the melting pressure between the previous gas-gun results and the present laser experiments suggests that the shock-melting process of polyimide is independent of the duration of the compression, revealing its rapid melting kinetics.

    DOI: 10.1103/physrevb.105.054103

    Other URL: http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevB.105.054103/fulltext

  • Mineral Components of Scleractinian Coral Skeletons Cultured Without Symbionts Reviewed

    S. Motai, J. Kawano, S. Harii, Y. Seto, T. Watanabe, T. Nagai

    Journal of Geophysical Research: Biogeosciences   127 ( 2 )   2022.02( ISSN:2169-8953

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    Skeletons of contemporary reef-building scleractinian corals are formed of aragonite, a polymorph of the calcium carbonate (CaCO3), notwithstanding calcite being a more stable phase under the condition of coral habitats. Circumstances developing aragonite in coral calcification have been addressed currently. Considering that the symbiotic relationship between the coral host and dinoflagellate algae (zooxanthellae) is perhaps relevant to coral calcification, we studied the impact of these symbiotic relationships on CaCO3 polymorph selection. Juvenile scleractinian corals (Acropora tenuis and Acropora digitifera) absent symbionts were cultured in seawaters with varied Mg/Ca molar ratios (mMg/Ca), and the mineral phases of the skeletons were detected employing X-ray diffraction. The findings revealed that diminutive quantities of calcite precipitated as coral skeleton in Acropora digitifera surprisingly in pseudo-present seawater (mMg/Ca similar to 5). Additionally, coral developed skeletons from only calcite in seawater with an mMg/Ca < 1. The evidence gathered in this investigation suggests that the symbiotic relationship affects the establishment of aragonite skeletons in the course of coral calcification.

    DOI: 10.1029/2021jg006574

    Other URL: https://onlinelibrary.wiley.com/doi/full-xml/10.1029/2021JG006574

  • Ultrafast olivine-ringwoodite transformation during shock compression Reviewed

    Takuo Okuchi, Yusuke Seto, Naotaka Tomioka, Takeshi Matsuoka, Bruno Albertazzi, Nicholas J. Hartley, Yuichi Inubushi, Kento Katagiri, Ryosuke Kodama, Tatiana A. Pikuz, Narangoo Purevjav, Kohei Miyanishi, Tomoko Sato, Toshimori Sekine, Keiichi Sueda, Kazuo A. Tanaka, Yoshinori Tange, Tadashi Togashi, Yuhei Umeda, Toshinori Yabuuchi, Makina Yabashi, Norimasa Ozaki

    Nature Communications   12 ( 1 )   4305   2021.12

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    <title>Abstract</title>Meteorites from interplanetary space often include high-pressure polymorphs of their constituent minerals, which provide records of past hypervelocity collisions. These collisions were expected to occur between kilometre-sized asteroids, generating transient high-pressure states lasting for several seconds to facilitate mineral transformations across the relevant phase boundaries. However, their mechanisms in such a short timescale were never experimentally evaluated and remained speculative. Here, we show a nanosecond transformation mechanism yielding ringwoodite, which is the most typical high-pressure mineral in meteorites. An olivine crystal was shock-compressed by a focused high-power laser pulse, and the transformation was time-resolved by femtosecond diffractometry using an X-ray free electron laser. Our results show the formation of ringwoodite through a faster, diffusionless process, suggesting that ringwoodite can form from collisions between much smaller bodies, such as metre to submetre-sized asteroids, at common relative velocities. Even nominally unshocked meteorites could therefore contain signatures of high-pressure states from past collisions.

    DOI: 10.1038/s41467-021-24633-4

    PubMed

    Other URL: http://www.nature.com/articles/s41467-021-24633-4

  • Origin of minerals in åkermanite-rich patch texture and oxygen isotopic evolution of compact Type A Ca-Al-rich inclusions from the Northwest Africa 7865 CV chondrite Reviewed

    Akimasa Suzumura, Noriyuki Kawasaki, Yusuke Seto, Hisayoshi Yurimoto, Shoichi Itoh

    Geochimica et Cosmochimica Acta   303   51 - 65   2021.06( ISSN:0016-7037

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    We report the in-situ oxygen isotopic distributions corresponding to the petrographic-mineralogical observation on a compact Type A (CTA) Ca-Al-rich inclusion (CAI), KU-N-02, from a reduced CV3 chondrite, Northwest Africa 7865. The CTA has an igneous texture and mainly consists of spinel, melilite, and Al-Ti-rich clinopyroxene (fassaite). Oxygen isotopic compositions of the constituent minerals plot along the carbonaceous chondrite anhydrous mineral line. The spinel grains are poikilitically enclosed in the melilite and fassaite and are uniformly 16O-rich (Δ17O = approximately − 23‰). The fassaite is texturally classified into two types: blocky fassaite and intergranular fassaite. The blocky fassaite crystals exhibit growth zoning as they change from Ti-rich to Ti-poor along the inferred directions of crystal growth from core to rim, while the oxygen isotopic compositions change from 16O-poor (Δ17O = approximately − 6‰) to 16O-rich (Δ17O = approximately − 23‰) with crystal growth. The intergranular fassaite crystals exist between the melilite crystals and exhibit variable Ti abundance and oxygen isotopic compositions. Additionally, their relationships between Ti contents and oxygen isotopic composition are similar to those of the blocky fassaite. The melilite grains are homogeneously 16O-poor (Δ17O = approximately − 2‰), irrespective of their åkermanite (Åk) content. Each melilite grain generally exhibits growth zoning with increasing Åk contents from core to rim, although the melilite contains Åk-rich patches within single crystal. Åk-rich patches often include two types of fassaite: small blebby crystals attached to spinel crystals and round crystals. The oxygen isotopic compositions of the Åk-rich patch and blebby fassaite are 16O-poor (Δ17O = approximately − 2‰), similar to that of the host melilite. On the other hand, the round fassaite exhibits significant variation in oxygen isotopic compositions ranging from Δ17O = −23‰ to − 4‰, which are different from those of the host melilite. These petrographic textures and oxygen isotopic variations indicate the presence of a solid precursor with variable oxygen isotopic compositions for the CTA. The spinel and round fassaite grains are relicts of the precursor that melted in the 16O-poor nebular gas, resulting in the crystallization of the host melilite from the 16O-poor melt. The Åk-rich patches and blebby fassaite crystallized from melts trapped by the growing host melilite crystals. The blocky and intergranular fassaite crystallized after the melilite did, and the oxygen isotopic composition of the melt changed to 16O-rich during the crystallization process, suggesting that the oxygen isotopic composition of the surrounding nebular gas could be varied. The inferred oxygen isotopic evolution for CTA is consistent with those inferred for Type B CAIs, suggesting that coarse-grained igneous CAIs formed in a similar nebular environment regardless of precursor chemistry.

    DOI: 10.1016/j.gca.2021.03.030

  • Magnetic susceptibility in the European Loess Belt: New and existing models of magnetic enhancement in loess Reviewed

    Balázs Bradák, Yusuke Seto, Thomas Stevens, Gábor Újvári, Katalin Fehér, Chiara Költringer

    Palaeogeography, Palaeoclimatology, Palaeoecology   569   110329 - 110329   2021.05( ISSN:0031-0182

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    DOI: 10.1016/j.palaeo.2021.110329

  • Liquid Structure of Tantalum under Internal Negative Pressure Reviewed

    K. Katagiri, N. Ozaki, S. Ohmura, B. Albertazzi, Y. Hironaka, Y. Inubushi, K. Ishida, M. Koenig, K. Miyanishi, H. Nakamura, M. Nishikino, T. Okuchi, T. Sato, Y. Seto, K. Shigemori, K. Sueda, Y. Tange, T. Togashi, Y. Umeda, M. Yabashi, T. Yabuuchi, R. Kodama

    Physical Review Letters   126 ( 17 )   175503   2021.04( ISSN:0031-9007

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  • Fast deformation of shocked quartz and implications for planar deformation features observed in shocked quartz

    Toshimori Sekine, Tomoko Sato, Norimasa Ozaki, Kohei Miyanishi, Ryosuke Kodama, Yusuke Seto, Yoshinori Tange, Subodh C. Tiwari, Aiichiro Nakano, Priya Vashishta

    SHOCK COMPRESSION OF CONDENSED MATTER - 2019: Proceedings of the Conference of the American Physical Society Topical Group on Shock Compression of Condensed Matter   2272 ( 080002 )   2020.11

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    Publishing type:Research paper (international conference proceedings)  

    DOI: 10.1063/12.0000930

  • Magnetic fabric of loess and its significance in Pleistocene environment reconstructions Reviewed

    Balázs Bradák, Yusuke Seto, Martin Chadima, József Kovács, Péter Tanos, Gábor Újvári, Masayuki Hyodo

    Earth-Science Reviews   210   103385 - 103385   2020.11( ISSN:0012-8252

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.earscirev.2020.103385

  • Crystallographic preferred orientation of talc determined by an improved EBSD procedure for sheet silicates: Implications for anisotropy at the slab–mantle interface due to Si-metasomatism Reviewed

    Takayoshi Nagaya, Atsushi Okamoto, Ryosuke Oyanagi, Yusuke Seto, Akira Miyake, Masaoki Uno, Jun Muto, Simon R. Wallis

    American Mineralogist   105 ( 6 )   873 - 893   2020.06( ISSN:0003-004X

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    Publishing type:Research paper (scientific journal)  

    <title>Abstract</title>
    Talc is widely distributed over the Earth's surface and is predicted to be formed in various tectonic settings. Talc is a very soft and anisotropic sheet silicate showing very low friction behavior. Therefore, the formation of talc is expected to weaken the strength of talc-bearing rocks and may be associated with the initiation of subduction, and with a decrease in the coupling coefficient resulting in aseismic movements along faults and shear zones within subduction zones. For these reasons, understanding the crystallographic preferred orientation (CPO) of talc is important to quantify the anisotropy and physical properties of the host rock. However, it is difficult to measure a significant number of talc crystal orientations and to evaluate the accuracy of the measurements using electron-backscattered diffraction (EBSD). Therefore, talc CPO has not been reported, and there is uncertainty regarding the estimation of the strength of deformed talc-bearing rocks. Using methods developed for antigorite, we report the first successful EBSD measurements of talc CPO from a talc schist formed due to Simetasomatism of ultramafic rocks by subduction zone fluids. We used a combination of W-SEM and FE-SEM measurements to examine domains of various grain sizes of talc. In addition, we used TEM measurements to evaluate the accuracy of the EBSD measurements and discuss the results of talc CPO analysis. Talc CPO in the present study shows a strong concentration of the pole to the (001) plane normal to the foliation. The strongest concentration of the [100] direction is parallel to the lineation. The talc schist produces similar S-wave splitting and P- and S-wave anisotropy as antigorite schist in deeper domains, thus identifying talc-rich layers in subduction zones may require a combination of geophysical surveys, seismic observations, and anisotropy modeling. The presence of strong talc CPO in rocks comprising the slab–mantle interface boundary may promote spatial expansion of the slip area during earthquakes along the base of the mantle wedge.

    DOI: 10.2138/am-2020-7006

  • Collisional disruption of highly porous targets in the strength regime: Effects of mixture Reviewed

    Yuichi Murakami, Akiko M. Nakamura, Koki Yokoyama, Yusuke Seto, Sunao Hasegawa

    Planetary and Space Science   182   2020.03

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    Publishing type:Research paper (scientific journal)   International / domestic magazine:International journal  

    © 2019 Elsevier Ltd Highly porous small bodies are thought to have been ubiquitous in the early solar system. Therefore, it is essential to understand the collision process of highly porous objects when considering the collisional evolution of primitive small bodies in the solar system. To date, impact disruption experiments have been conducted using high-porosity targets made of ice, pumice, gypsum, and glass, and numerical simulations of impact fracture of porous bodies have also been conducted. However, a variety of internal structures of high-porosity bodies are possible. Therefore, laboratory experiments and numerical simulations in the wide parameter space are necessary. In this study, high-porosity targets of sintered hollow glass beads and targets made by mixing perlite with hollow beads were used in a collision disruption experiment to investigate the effects of the mixture on collisional destruction of high-porosity bodies. Among the targets prepared under the same sintering conditions, it was found that the targets with more impurities tend to have lower compressive strength and lower resistance against impact disruption. Further, destruction of the mixture targets required more impact energy density than would have been expected from compressive strength. It is likely that the perlite grains in the target matrix inhibit crack growth through the glass framework. The mass fraction of the largest fragment collapsed to a single function of a scaling parameter of energy density in the strength regime (Πs) when assuming ratios of tensile strength to compressive strength based on a relationship obtained for ice-silicate mixtures. However, the dependence on Πs is much larger than that shown for porous targets with different internal microstructures from the targets in this study. The depth of the deep cavity specific to the high-porosity target was well represented by a dimensionless parameter using the compressive strength of both the pure glass and mixture targets. The empirical relationship of cavity depth was shown to hold for various targets used in previous studies irrespective of the internal microstructure of the targets.

    DOI: 10.1016/j.pss.2019.104819

  • Proximity coupling of superconducting nanograins with fractal distributions Reviewed

    Takashi Uchino, Nanami Teramachi, Ryosuke Matsuzaki, Emi Tsushima, Shusuke Fujii, Yusuke Seto, Kazuyuki Takahashi, Takao Mori, Yutaka Adachi, Yukihito Nagashima, Yoshifumi Sakaguchi, Kazuki Ohishi, Akihiro Koda, Takahiro Sakurai, Hitoshi Ohta

    Physical Review B   101 ( 3 )   2020.01( ISSN:2469-9950

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    Publishing type:Research paper (scientific journal)   International / domestic magazine:International journal  

    © 2020 American Physical Society. We explore the electrical and magnetic properties of a fractal assembly of Josephson junctions with transparent interfaces. For this purpose, we employ an Mg/MgO/MgB2 nanocomposite with ∼16 vol. % of MgB2 nanograins, which are distributed in a fractal manner in the normal matrix. Irrespective of the low volume fraction of MgB2 nanograins, the nanocomposite behaves as a bulk-like superconductor, i.e., zero resistivity, perfect diamagnetism, and strong vortex pinning. Thus, a global Josephson phase coherence is achieved in the nanocomposite. The lower (Hc1J) and higher (Hc2J) critical fields of the Josephson network are exceptionally high (Hc1J=96Oe and Hc2J=83.5kOe) as compared to those reported previously for granular superconductors. This will give an example of robust macroscopic superconducting coherence derived from long-range proximity coupling among fractally distributed superconducting nanograins through quantum interference of Andreev quasiparticles. Transverse-field muon spin rotation measurements reveal that the mean internal field in the superconducting mixed state increases with decreasing temperature below which the Josephson phase coherence sets in, opposite to the diamagnetic response observed in magnetization measurements. This unusual behavior implies a highly disordered and fluctuating nature of the Josephson vortices in the present superconducting nanocomposite.

    DOI: 10.1103/PhysRevB.101.035146

  • Significant pedogenic and palaeoenvironmental changes during the early Middle Pleistocene in Central Europe Reviewed

    B. Bradák, Y. Seto, J. Nawrocki

    Palaeogeography, Palaeoclimatology, Palaeoecology   534   109335 - 109335   2019.11( ISSN:0031-0182

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.palaeo.2019.109335

  • The hematite–goethite enhancement model of loess and an ‘irregular’ case from Paks, Hungary Reviewed International coauthorship

    B. Bradák, Y. Seto, D. Csonka, T. Végh, J. Szeberényi

    Journal of Quaternary Science   34 ( 4-5 )   299 - 308   2019.07( ISSN:0267-8179

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/jqs.3101

    Other URL: https://onlinelibrary.wiley.com/doi/full-xml/10.1002/jqs.3101

  • X-ray Free Electron Laser (XFEL) Observation of Lonsdaleite Formation by Ultrafast Laser Shock Compression

    KATAGIRI Kento, OZAKI Norimasa, MATSUOKA Takahiro, MATSUOKA Takeshi, MIYANISHI Kohei, SETO Yusuke, UMEDA Yuhei, HOSOMI Minoru, MORIOKA Shintaro, INUBUSHI Yuichi, TOGASHI Tadashi, YABUUCHI Toshinori, YABASHI Makina, KODAMA Ryosuke

    The Review of Laser Engineering   47 ( 1 )   47   2019( ISSN:0387-0200

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    We directly observed laser shock-induced, anomalous elastic compression of highly oriented pyrolytic
    graphite (HOPG) and subsequent phase transition to lonsdaleite at a longitudinal stress of ~30 GPa using
    an X-ray Free Electron Laser (XFEL). The observed phase transition is diffusionless and most likely
    relaxes a strong shear stress in the highly elastically compressed lattice. Our experimental results show
    that this diffusionless transformation depends on the mosaic spread of Highly Oriented Pyrlolytic
    Graphite (HOPG) samples.

    DOI: 10.2184/lsj.47.1_47

    CiNii Article

    Other URL: http://id.ndl.go.jp/bib/029483027

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MISC

  • Petrography and oxygen isotopic compositions of a compact Type A Ca-Al-inclusion from NWA 7865 reduced CV3 chondrite

    鈴村明政, 川崎教行, 瀬戸雄介, 圦本尚義, 圦本尚義, 伊藤正一

    日本地球惑星科学連合大会予稿集(Web)   2020   2020

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  • Compact Type A CAIに局所的に存在するAkermanite成分に富んだメリライトの成因

    鈴村明政, 川崎教行, 瀬戸雄介, 圦本尚義, 圦本尚義, 伊藤正一

    日本地球化学会年会要旨集(Web)   66th   2019

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Presentations

  • Phase transition and melting in zircon by nanosecond shock loading

    2021.10 

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    Presentation type:Poster presentation  

  • ベッセルビーム微小爆発による透明結晶内部での高圧物質凍結に 関する研究

    中村 浩隆, 小倉 広之, 上林 大介, 上村 拳生, 村山 大輔, RAPP Ludovic, GAMALY Eugene, RODE Andrei, 松岡 健之, 寒河江 大輔, 瀬戸 雄介, 菖蒲 敬久, 染川 智弘, 富永 亜希, PIKUZ Tatiana, 兒玉 了祐, 尾崎 典雅

    第62回高圧討論会  2021.10 

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    Presentation type:Poster presentation  

  • 衝撃圧縮下における多結晶体試料の格子歪み解析

    瀬戸 雄介

    第62回高圧討論会  2021.10 

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    Presentation type:Oral presentation (general)  

  • レーザー衝撃圧縮法で再現する高速天体衝突極限環境における含 水鉱物の高圧物性計測と時間分解構造観察

    梅田 悠平, 奥地 拓生, 関根 利守, 佐野 孝好, 犬伏 雄一, 片桐 健登, 兒玉 了祐, 宮西 宏併, 瀬戸 雄介, 清水 健二, 篠田 圭司, 末田 敬一, 富樫 格, 冨岡 尚敬, 藪内 俊毅, 尾崎 典雅

    第62回高圧討論会  2021.10 

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    Presentation type:Oral presentation (general)  

  • 高圧下における破壊現象の解明を目指した応力 ・ 歪の高速時分割 測定の技術開発

    大内 智博, 肥後 祐司, 丹下 慶範, 瀬戸 雄介, 入舩 徹男

    第62回高圧討論会  2021.10 

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    Presentation type:Oral presentation (general)  

  • レーザー衝撃圧縮による液体金属シリコンに関する研究

    尾崎 典雅, 佐藤 友子, 瀬戸 雄介, 新田 蒼真, 片桐健登, 中村 浩隆, 佐野 孝好, 兒玉 了祐, 奥地 拓生, 宮西 宏併, 末田 敬一, 冨樫 格, 犬伏 雄一, 籔内 俊毅, 矢橋 牧名, 大村 訓

    第62回高圧討論会  2021.10 

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    Presentation type:Oral presentation (general)  

  • X 線自由電子レーザーによるナノ多結晶ダイヤモンド超高速変形のその場観察

    片桐 健登, 尾崎 典雅, DRESSELHAUS-MARAIS Leora, EGGERT Jon H, 犬伏 雄一, 松岡 健之, 宮西 宏併, 西山 宣正, 末田 敬一, 関根 利守, 瀬戸 雄介, 丹下 慶範, 入舩 徹男, 富樫 格, 梅田 悠平, 矢橋 牧名, 籔内 俊毅, 兒玉 了祐

    第62回高圧討論会  2021.10 

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    Presentation type:Poster presentation  

  • 非晶質微粒子の高温水質変成過程の中性子準弾性散 乱

    奥地 拓生, 富岡 尚敬, 瀬戸 雄介, 梅田 悠平, 山田 武, 玉造 博夢, 柴田 薫

    日本鉱物科学会2021年会  2021.09 

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    Presentation type:Oral presentation (general)  

  • Microtexutural observations of TCIs in five CM carbonaceous chondrites and implications to aqueous environments on CM parent bodies

    Akane Iemoto, Yusuke Seto, Akira Miyake

    JpGU-AGU Joint meeting 2020  2020.07 

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    Presentation type:Poster presentation  

  • ナノ多結晶ダイヤモンドのレーザー衝撃圧縮 International coauthorship Domestic conference

    The 60th High Pressure Conference of Japan  2019.10 

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    Presentation type:Oral presentation (general)  

  • カンラン石及び同高圧相のレーザー衝撃圧縮時間分解その場X線回折 International coauthorship Domestic conference

    The 60th High Pressure Conference of Japan  2019.10 

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    Presentation type:Oral presentation (general)  

  • XFELを用いた衝撃誘起ナノ多結晶化プロセスの直接観察と展開 International coauthorship Domestic conference

    The 60th High Pressure Conference of Japan  2019.10 

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    Presentation type:Poster presentation  

  • XFELを用いた衝撃誘起ナノ多結晶化プロセスの直接観察 International coauthorship Domestic conference

    The 60th High Pressure Conference of Japan  2019.10 

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    Presentation type:Oral presentation (general)  

  • 衝撃圧縮された多結晶アルミナ中の差応力時間発展 Domestic conference

    The 60th High Pressure Conference of Japan  2019.10 

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    Presentation type:Oral presentation (general)  

  • 衝撃圧縮下におけるXFEL回折パターン解析手法の開発 Domestic conference

    The 60th High Pressure Conference of Japan  2019.10 

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    Presentation type:Oral presentation (general)  

  • 動力学効果を考慮した電子回折パターンの方位解析 Domestic conference

    2019.09 

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    Presentation type:Oral presentation (general)  

  • 中性子散乱と透過電顕による含水鉱物の微視的な脱水過程の解析 Domestic conference

    2019.09 

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    Presentation type:Poster presentation  

  • フォルステライト単結晶のレーザー衝撃圧縮その場X線回折実験 Domestic conference

    2019.09 

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    Presentation type:Oral presentation (general)  

  • Precession electron diffraction法の鉱物への適用と評価 Domestic conference

    2019.09 

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    Presentation type:Oral presentation (general)  

  • 水質変質程度の異なるCMコンドライト中TCIの微細組織観察 Domestic conference

    2019.09 

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    Presentation type:Oral presentation (general)  

  • 深層学習による薄片画像の認識と岩石分類 Domestic conference

    2019.09 

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    Presentation type:Poster presentation  

  • Petrographic study of a compact type A CAI with partial melting process International conference

    A. Suzumura, Y. Seto, S. Itoh

    The 82nd Annual Meeting of the Meteoritical Society  2019.07 

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    Presentation type:Poster presentation  

    Venue:Hokkaido University  

  • Nano-sized Magnetite and Hematite Inclusions in Muscovite Significantly Contribute to the Magnetic Enhancement of Loess–paleosol Deposits International conference

    HYODO MASAYUKI, SANO TAKURO, MATSUMOTO MEGUMI, SETO YUSUKE, SUZUKI KOTA, YANG TIANSHUI

    AOGS 16th Annual Meeting  2019.07 

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    Presentation type:Oral presentation (general)  

    Venue:Singapore  

  • Mineralogical study of TCIs in CM carbonaceous chondrites and implications to the formation processes International conference

    A. Iemoto, Y. Seto, A. Miyake

    The 82nd Annual Meeting of the Meteoritical Society  2019.07 

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    Presentation type:Poster presentation  

    Venue:Hokkaido University  

  • Development of GUI-based Software for Electron Diffraction Analyses Domestic conference

    瀬戸 雄介, 大塚 真弘, 伊神 洋平, 三宅 亮

    The 75th Annual Meeting of the Japanese Society of Microscopy  2019.06 

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    Presentation type:Poster presentation  

    Venue:Nagoya  

  • Mineralogical study of TCIs in CM carbonaceous chondrites Domestic conference

    Akane Iemoto, Yusuke Seto, Akira Miyake

    Japan Geoscience Union Meeting 2019  2019.05 

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    Presentation type:Oral presentation (general)  

    Venue:Makuhari Messe, Chiba  

  • レス中白雲母が含有する大量の磁鉄鉱・赤鉄鉱ナノ粒子 Domestic conference

    HYODO MASAYUKI, 佐野拓郎, 松本恵, Seto Yusuke, 鈴木康太, 楊天水

    日本地球惑星科学連合2019年大会  2019.05  日本地球惑星科学連合

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    Presentation type:Oral presentation (general)  

    Venue:千葉  

  • Shock-compressed behavior of quartz by XFEL International conference

    Tomoko Sato, Yoshinori Tange, Yusuke Seto, Toshimori Sekine, Norimasa Ozaki, Toyohito Nishikawa, Kohei Miyanishi, Kensuke Matsuoka, Ryosuke Kodama, Tadashi Togashi, Yuichi Inubushi, Toshinori Yabuuchi, Makina Yabashi

    Japan Geoscience Union Meeting 2019  2019.05 

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    Presentation type:Poster presentation  

    Venue:Makuhari Messe, Chiba  

  • Linking occurrence and texture of dense silicate minerals in shocked meteorites with laser-shock experimental results of Mg2SiO4 analyzed by XFEL probe International conference

    Takuo Okuchi, Narangoo Purevjav, Norimasa Ozaki, Takeshi Matsuoka, Yusuke Seto, Yoshinori Tange, Toshinori Yabuuchi, Naotaka Tomioka, Toshimori Sekine, Ryosuke Kodama

    Japan Geoscience Union Meeting 2019  2019.05 

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    Presentation type:Oral presentation (general)  

    Venue:Makuhari Messe, Chiba  

  • Petrographic study of compact type A CAIs with partial melting process Domestic conference

    Akimasa Suzumura, Yusuke Seto, Shoichi Itoh

    Japan Geoscience Union Meeting 2019  2019.05 

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    Presentation type:Oral presentation (general)  

    Venue:Makuhari Messe, Chiba  

  • Development of a software for electron diffraction simulation based on dynamical theory and its application to mineralogy Domestic conference

    Yusuke Seto, Masahiro Ohtuka, Akira Miyake

    Japan Geoscience Union Meeting 2019  2019.05 

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    Presentation type:Oral presentation (general)  

    Venue:Makuhari Messe, Chiba  

  • レスの帯磁率増加に寄与する白雲母含有の磁鉄鉱・赤鉄鉱ナノ粒子 Domestic conference

    HYODO MASAYUKI, 佐野 拓郎, 松本 恵, 鈴木 康太, Seto Yusuke, 楊天水

    平成30年度高知大学海洋コア総合研究センター共同利用・共同研究成果発表会  2019.03 

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    Presentation type:Oral presentation (general)  

    Venue:高知大学  

  • 高空隙率小天体模擬標的の衝突破壊実験:焼結温度の異なる混合物の影響 Domestic conference

    村上 雄一, 中村 昭子, 瀬戸 雄介, 長谷川 直

    平成30年度宇宙科学に関する室内実験シンポジウム  2019.02 

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    Presentation type:Oral presentation (general)  

    Venue:宇宙科学研究所  

  • 水に富む月の上部マントル

    鹿山雅裕, 中嶋悟, 富岡尚敬, 瀬戸雄介, 大谷栄治, FAGAN Timothy J, 長岡央, 小澤信, 関根利守, 宮原正明, 三宅亮, 福田惇一, 留岡和重, 市村隼, 松本恵, 鈴木康太, GӦTZE Jens

    日本地球惑星科学連合2016年大会  2016 

  • 月面に存在する新たな水源

    鹿山雅裕, 富岡尚敬, 大谷栄治, 中嶋悟, 瀬戸雄介, 長岡央, FAGAN Timothy J, GӦTZE Jens, 三宅亮, 小澤信, 関根利守, 宮原正明, 松本恵, 庄田直起, 留岡和重

    日本地球惑星科学連合2016年大会  2016 

  • MAC 88107隕石の微細組織:この隕石は本当に星雲集積岩か

    酒井 碧, 留岡和重, 瀬戸雄介, 三宅亮

    日本地球惑星科学連合2015年大会  2015 

  • NWA1232 CO3隕石中の熱変成度の異なる岩片を含む岩相

    松本 恵, 留岡 和重, 瀬戸 雄介, 山本 由紀子, 梅原 まり子, 三宅 亮, 浜根 大輔

    日本地球惑星科学連合2014年大会  2014 

  • Allende隕石に含まれる特異なdark clastの微細組織:前駆岩相と変成履歴の推定

    酒井 碧, 留岡 和重, 瀬戸 雄介, 三宅 亮

    日本地球惑星科学連合2013年大会  2013 

  • コンドライト母天体におけるネフェリン形成条件の推定:水熱変成実験による溶液/岩石比と溶液pHへの制約

    市村 隼, 瀬戸 雄介, 留岡 和重, 三宅 亮

    日本地球惑星科学連合2013年大会  2013 

  • Yamato81020 CO3.0 コンドライトに含まれる層状ケイ酸塩鉱物に富むCI-like なクラスト

    森家 智嗣, 留岡 和重, 瀬戸 雄介, 三宅 亮

    日本地球惑星科学連合2013年大会  2013 

  • Ningqiang隕石母天体におけるネフェリン形成プロセスの解明:透過型電子顕微鏡・放射光X線回折による研究

    松本 恵, 瀬戸雄介, 三宅亮, 留岡和重, 杉田光弘

    日本地球惑星科学連合2012年大会  2012 

  • Microstructure and its origin of isotopically anomalous material COS in the Acfer 094 carbonaceous chondrite

    SETO Yusuke, TOH Shoichi, SAKAMOTO Naoya, YURIMOTO Hisayoshi

    日本鉱物科学会年会講演要旨集  2010.09 

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Works

Outline of education staff

  • 鉱物学・結晶学・隕石学・分析科学に関する理論と応用

Charge of off-campus class subject

  • 惑星物質科学2

    Institution:Kobe University

  • 惑星物質科学1

    Institution:Kobe University

  • 惑星物質科学

    Institution:Kobe University

  • 惑星学実習E1

    Institution:Kobe University

  • 惑星学実習D

    Institution:Kobe University

  • 惑星学基礎Ⅴ演習

    Institution:Kobe University

  • Planetary Material Science 2

    Institution:Kobe University

  • Planetary Material Science 1

    Institution:Kobe University

  • Planetary Material Science

    Institution:Kobe University

  • Experimental Training in Planetology Science E1

    Institution:Kobe University

  • Experimental Training in Planetology Science D

    Institution:Kobe University

  • Exercise of Fundamental Planetology V

    Institution:Kobe University

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