最下部マントル物質の粘性率の決定

• Project/Area Number: 22H00180
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Medium-sized Section 17:Earth and planetary science and related fields
• Research Institution: Okayama University
• Principal Investigator: 山崎 大輔 岡山大学, 先鋭研究領域, 教授 (90346693)
• Co-Investigator(Kenkyū-buntansha): 辻野 典秀 公益財団法人高輝度光科学研究センター, 回折・散乱推進室, 研究員 (20633093) ; 芳野 極 岡山大学, 先鋭研究領域, 教授 (30423338) ; 坂本 直哉 北海道大学, 総合イノベーション創発機構, 准教授 (30466429)
• Project Period (FY): 2022-04-01 – 2027-03-31
• Project Status: Granted (Fiscal Year 2026)
• Budget Amount: ¥43,420,000 (Direct Cost: ¥33,400,000、Indirect Cost: ¥10,020,000); Fiscal Year 2026: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000); Fiscal Year 2025: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000); Fiscal Year 2024: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000); Fiscal Year 2023: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000); Fiscal Year 2022: ¥24,050,000 (Direct Cost: ¥18,500,000、Indirect Cost: ¥5,550,000)
• Keywords: 最下部マントル / 粘性率 / ポストペロフスカイト / ペロフスカイト / マントル最下部層

Outline of Research at the Start

地球のマントル最下部層に大規模横波低速度領域が偏在している。速度低下の主な原因として、周囲のマントルに比較してこれらの領域が高温であるという議論（熱起源論）と、化学組成が異なっているという議論（化学的不均質起源論）の2つが主流となっている。一方で、この領域は比較的高粘性であるという推定がある。一般的に粘性率は高温であるほど低い傾向があるため、粘性率と速度構造は逆相関を示していることになる。逆相関は何に由来するのか、あるいはこの領域の起源は何かという疑問を、構成物質の粘性的性質を調査することにより解明し、地球深部の温度や化学構造などに新たな制約を与える。

Outline of Annual Research Achievements

地震学的研究から地球の下部マントル最下部での速度不均質が指摘されている。その例として、LLSVPと略称される大規模低S波速度構造の存在が挙げられる。このような弾性的性質に基づく不均質に加えて、ジオイドなどの他の地球物理学的観測から、同様に、マントル最下部には粘性率においても不均質があることが報告されている。本研究では、マントル最下部の粘性率構造の成因を物質科学的に解明し、LLSVPなどの速度構造との関係性にも制約を与えることを目的としている。
マントル最下部は、物質として、珪酸塩ペロフスカイト（ブリッジマナイト）とポストペロフスカイトで主要に構成されている。従って、実験的にこれらの粘性率を調査することが第一義的に重要となる。しかしながら、珪酸塩ポストペロフスカイトは120 GPa以上という高圧力下のみで安定な物質であり、実験的に、レオロジーを研究することが困難である。そこで、そのような実験技術を開発しつつ、同時に、珪酸塩ポストペロフスカイトのアナログ物質を用いた実験的研究を行う。
これまで、アナログ物質として、NaNiF3を用いてきている。NaNiF3は結晶構造はもとより、各結晶軸の軸比などが珪酸塩のそれに近く、アナログ物質として有用であると考えられている。そのNaNiF3に関する変形実験の結果から、ペロフスカイトとポストペロフスカイトでは粘性率に大きな差がないことと、ポストペロフスカイトの粘性率の結晶方位への依存性は大きくないことが明らかになってきている。

Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

ポストペロフスカイトの粘性率の結晶方位異方性を変形実験により明らかにするためには、異なった選択配向を形成している試料の変形速度を比較することが有効な手段となる。これまでは、十分な選択配向を形成させることが難しく予備的な結果となっていた。そこで、実際の変形実験において、試料に対して、温度と変形速度を調整しつつ圧縮と引っ張り変形を繰り返すことにより、充分に成熟した異なる選択配向をもつ試料を合成することが可能となり、信頼できる結果を得ることができた。
さらに、ペロフスカイト（ブリッジマナイト）のレオロジーについては、実際の珪酸塩に関して、変形実験を行って、選択配向の様式や、混合相としての粘性率などに関して実験的結果を蓄積しつつある。加えて、より詳細に結晶方位依存性を検討するための拡散実験にも着手しはじめてきている。
以上のように成果をあげつつあり、総合的に状況を判断して、おおむね順調に進展していると判断した。

Strategy for Future Research Activity

NaNiF3の変形実験に関しては、つまり、ペロフスカイトとポストペロフスカイトの粘性差や選択配向の影響などに関しては、十分な結果が得られいると考えられる。そこで、今後は、拡散実験からのアプローチにより、レオロジーを解明していく。特に、第一原理計算による先行研究からは、珪酸塩ポストペロフスカイトでは、拡散速度の結晶方位異方性が大きいと報告されている。このことを実験的に確認するため、NaNiF3ペロフスカイト多結晶体、ポストペロフスカイト等方的多結晶体、選択配向したポストペロフスカイト多結晶体、ポストペロフスカイト単結晶に関して、拡散速度を算出し、比較検討を行う。さらに、システマティックスの観点から、他のアナログ物質、例えば、NaCoF3やCaSnO3などに関する実験も検討していく。
また、高温高圧発生に関して、材料やセルデザインなどの最適化を含めて技術開発にも注力し、より高圧でのレオロジー実験、とくに静的な拡散や粒成長実験などを行い、多角的に課題を遂行していく。

Research Products

• [Int'l Joint Research] University Collage of London(英国)
• [Int'l Joint Research] Zhejiang University(中国)
• [Int'l Joint Research] University Collage of London(英国)
• [Int'l Joint Research] Chinese Academy of Science(中国)
• [Journal Article] Grain boundary diffusion cannot explain the W isotope heterogeneities of the deep mantle (2025)
  • Author(s): Peng Yihang、Yoshino Takashi、Deng Jie
  • Journal Title: Nature Communications Volume: 16 Issue: 1
  • DOI: 10.1038/s41467-025-57120-1
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] An evaporite sequence from ancient brine recorded in Bennu samples (2025)
  • Author(s): McCoy T. J., Russell S. S., Zega T. J., Thomas-Keprta K. L., Singerling S. A., Brenker F. E.他60名
  • Journal Title: Nature Volume: 637 Issue: 8048 Pages: 1072-1077
  • DOI: 10.1038/s41586-024-08495-6
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Crystallographic Preferred Orientation of Phase D at High Pressure and Temperature: Implications for Seismic Anisotropy in the Mid‐Mantle (2024)
  • Author(s): Wu Wentian、Nishihara Yu、Tsujino Noriyoshi
  • Journal Title: Journal of Geophysical Research: Solid Earth Volume: 129 Issue: 10 Pages: 1-17
  • DOI: 10.1029/2024jb029734
  • Peer Reviewed / Open Access
• [Journal Article] Sound velocities in lunar mantle aggregates at simultaneous high pressures and temperatures: Implications for the presence of garnet in the deep lunar interior (2024)
  • Author(s): Wood Marisa C.、Greaux Steeve、Kono Yoshio、Kakizawa Sho、Ishikawa Yuta、Inou? Sayako、Kuwahara Hideharu、Higo Yuji、Tsujino Noriyoshi、Irifune Tetsuo
  • Journal Title: Earth and Planetary Science Letters Volume: 641 Pages: 118792-118792
  • DOI: 10.1016/j.epsl.2024.118792
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Pressure-induced polyamorphic transition in CaAl2O4 glass (2024)
  • Author(s): Ohira Itaru、Kono Yoshio、Greaux Steeve、Drewitt James W. E.、Jahn Sandro、Noritake Fumiya、Ohara Koji、Hiroi Satoshi、Kondo Nozomi M.、Hrubiak Rostislav、Higo Yuji、Tsujino Noriyoshi、Kakizawa Sho、Nitta Kiyofumi、Sekizawa Oki
  • Journal Title: Physical Review B Volume: 110 Issue: 5 Pages: 054115-054115
  • DOI: 10.1103/physrevb.110.054115
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Limited stability of hydrous SiO2 stishovite in the deep mantle (2024)
  • Author(s): Takaichi Goru、Nishihara Yu、Matsukage Kyoko N.、Nishi Masayuki、Higo Yuji、Tange Yoshinori、Tsujino Noriyoshi、Kakizawa Sho
  • Journal Title: Earth and Planetary Science Letters Volume: 640 Pages: 118790-118790
  • DOI: 10.1016/j.epsl.2024.118790
  • Peer Reviewed
• [Journal Article] Structures, Phase Stability, Amorphization, and Decomposition of V6O13 at High Pressures and Temperatures: Synthesis of Rutile-Related V0.92O2 (2024)
  • Author(s): Grzechnik Andrzej、Hakala B. Viliam、Kurig Sophia、Walte Nicolas、Tsujino Noriyoshi、Kakizawa Sho、Higo Yuji、Zagorac Dejan、Zagorac Jelena、Dronskowski Richard、Schon J. Christian、Friese Karen
  • Journal Title: Crystal Growth & Design Volume: 24 Issue: 13 Pages: 5582-5592
  • DOI: 10.1021/acs.cgd.4c00363
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Transient Creep in Olivine at Shallow Mantle Pressures: Implications for Time‐Dependent Rheology in Post‐Seismic Deformation (2024)
  • Author(s): Ohuchi Tomohiro、Higo Yuji、Tsujino Noriyoshi、Seto Yusuke、Kakizawa Sho、Tange Yoshinori、Miyagawa Yamato、Kono Yoshio、Yumoto Hirokatsu、Koyama Takahisa、Yamazaki Hiroshi、Senba Yasunori、Ohashi Haruhiko、Inoue Ichiro、Hayashi Yujiro、Yabashi Makina、Irifune Tetsuo
  • Journal Title: Geophysical Research Letters Volume: 51 Issue: 11 Pages: 1-9
  • DOI: 10.1029/2024gl108356
  • Peer Reviewed / Open Access
• [Journal Article] Aluminum and Iron Effects on the Electrical Conductivity of the Dense Hydrous Magnesium Silicate Phase E (2024)
  • Author(s): Zhao Bin、Mashino Izumi、Yoshino Takashi
  • Journal Title: Journal of Geophysical Research: Solid Earth Volume: 129 Issue: 10
  • DOI: 10.1029/2024jb029659
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Electrical conductivity of siderite and the effect of the spin transition of iron (2024)
  • Author(s): Mashino Izumi、Yoshino Takashi、Mitsui Takaya、Fujiwara Kosuke、Garai M.、Yamashita Shigeru
  • Journal Title: Physics and Chemistry of Minerals Volume: 51 Issue: 2 Pages: 1-12
  • DOI: 10.1007/s00269-024-01283-8
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Zirconium isotope composition indicates s-process depletion in samples returned from asteroid Ryugu (2024)
  • Author(s): Schonbachler Maria、Fehr Manuela A.、Yokoyama Tetsuya、Gautam Ikshu、Nakanishi Nao、Hikaru Yabuta(代表者は76番目)ほか共著者85名
  • Journal Title: Meteoritics & Planetary Science Volume: 60 Issue: 1 Pages: 3-16
  • DOI: 10.1111/maps.14279
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Update on the 53Mn-53Cr ages of dolomite in the Ivuna CI chondrite and asteroid Ryugu sample (2024)
  • Author(s): Sugawara Shingo, Fujiya Wataru, Kawasaki Noriyuki, Sakamoto Naoya, Yamaguchi Akira, Hisayoshi Yurimoto
  • Journal Title: Geochimica et Cosmochimica Acta Volume: 382 Pages: 40-50
  • DOI: 10.1016/j.gca.2024.08.013
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The Ni isotopic composition of Ryugu reveals a common accretion region for carbonaceous chondrites (2024)
  • Author(s): Spitzer Fridolin、Kleine Thorsten、Burkhardt Christoph、Hopp Timo、Yokoyama Tetsuya、Hikaru Yabuta (代表者は74番目))、ほか85名
  • Journal Title: Science Advances Volume: 10 Issue: 39 Pages: 2426-2426
  • DOI: 10.1126/sciadv.adp2426
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Trace element partitioning in a deep magma ocean and the origin of the Hf-Nd mantle array (2024)
  • Author(s): Ozawa Keisuke, Sakamoto Naoya, Tsutsumi Yutaro, Hirose Kei, Iizuka Tsuyoshi, Yurimoto Hisayoshi
  • Journal Title: Science Advances Volume: 10 Issue: 33
  • DOI: 10.1126/sciadv.adp0021
  • Peer Reviewed / Open Access
• [Journal Article] Pyrrhotites in asteroid 162173 Ryugu: Records of the initial changes on their surfaces with aqueous alteration (2024)
  • Author(s): Yui Hiroharu、Urashima Shu-hei、Onose Morihiko、Morita Mayu、Komatani Shintaro、Hikaru Yabuta 379 (代表者は73番目)、ほか83名
  • Journal Title: Geochimica et Cosmochimica Acta Volume: 379 Pages: 172-183
  • DOI: 10.1016/j.gca.2024.06.016
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Retention of water in subducted slabs under core?mantle boundary conditions (2024)
  • Author(s): Tsutsumi Yutaro、Sakamoto Naoya、Hirose Kei、Tagawa Shoh、Umemoto Koichiro、Ohishi Yasuo、Yurimoto Hisayoshi
  • Journal Title: Nature Geoscience Volume: 17 Issue: 7 Pages: 697-704
  • DOI: 10.1038/s41561-024-01464-8
  • Peer Reviewed
• [Journal Article] Disequilibrium oxygen isotope distribution among aqueously altered minerals in Ryugu asteroid returned samples (2024)
  • Author(s): Kita N., including Hibiya Y. and Iizuka T.
  • Journal Title: Meteoritics & Planetary Science Volume: in press Issue: 8 Pages: 2097-2116
  • DOI: 10.1111/maps.14163
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Pressure dependence of metal-silicate partitioning explains the mantle phosphorus abundance (2024)
  • Author(s): Ikuta Nagi、Sakamoto Naoya、Tagawa Shoh、Hirose Kei、Tsutsumi Yutaro、Yokoo Shunpei、Yurimoto Hisayoshi
  • Journal Title: Scientific Reports Volume: 14 Issue: 1 Pages: 1194-1194
  • DOI: 10.1038/s41598-024-51662-y
  • Peer Reviewed / Open Access
• [Journal Article] A thermally conductive Martian core and implications for its dynamo cessation (2024)
  • Author(s): Hsieh Wen-Pin、Deschamps Fr?d?ric、Tsao Yi-Chi、Yoshino Takashi、Lin Jung-Fu
  • Journal Title: Science Advances Volume: 10 Issue: 12
  • DOI: 10.1126/sciadv.adk1087
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Wetting property of Fe‐S melt in solid core: Implication for the core crystallization process in planetesimals (2024)
  • Author(s): Matsubara Shiori、Terasaki Hidenori、Yoshino Takashi、Urakawa Satoru、Yumitori Daisuke
  • Journal Title: Meteoritics & Planetary Science Volume: 59 Issue: 6 Pages: 14149-14149
  • DOI: 10.1111/maps.14149
  • Peer Reviewed / Open Access
• [Journal Article] Effect of water on seismic attenuation of the upper mantle: The origin of the sharp lithosphere?asthenosphere boundary (2023)
  • Author(s): Liu Chao、Yoshino Takashi、Yamazaki Daisuke、Tsujino Noriyoshi、Gomi Hitoshi、Sakurai Moe、Zhang Youyue、Wang Ran、Guan Longli、Lau Kayan、Tange Yoshinori、Higo Yuji
  • Journal Title: Proceedings of the National Academy of Sciences Volume: 120 Issue: 32 Pages: 2221770120-2221770120
  • DOI: 10.1073/pnas.2221770120
  • Peer Reviewed / Open Access
• [Journal Article] Rheology of Hexagonal Close‐Packed (hcp) Iron (2023)
  • Author(s): Nishihara Yu、Doi Shunta、Tsujino Noriyoshi、Yamazaki Daisuke、Matsukage Kyoko N.、Tsubokawa Yumiko、Yoshino Takashi、Thomson Andrew R.、Higo Yuji、Tange Yoshinori
  • Journal Title: Journal of Geophysical Research: Solid Earth Volume: 128 Issue: 6
  • DOI: 10.1029/2022jb026165
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Preliminary results from the new deformation multi-anvil press at the Photon Factory: insight into the creep strength of calcium silicate perovskite (2023)
  • Author(s): Thomson, A.R, Nishihara, Y, Yamazaki, D, Tsujino, N, Hunt, S.A, Tsubokawa, Y, Matsukage, K, Yoshino, T, Kubo, T, Dobson, D.P
  • Journal Title: Core-Mantle Co-Evolution: An Interdisciplinary Approach Volume: -
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Formation of metallic Fe in bridgmanite under shallow lower mantle conditions (2023)
  • Author(s): Tsujino Noriyoshi、Girard Jennifer、Bi Wenli、Alp Esen E.、Karato Shun-ichiro
  • Journal Title: Physics of the Earth and Planetary Interiors Volume: 337 Pages: 107010-107010
  • DOI: 10.1016/j.pepi.2023.107010
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Some new insights about electrical discontinuities in the cratonic lithosphere (2023)
  • Author(s): Zhang Baohua、Fei Hongzhan、Yoshino Takashi、Xia Qunke
  • Journal Title: Earth-Science Reviews Volume: 246 Pages: 104592-104592
  • DOI: 10.1016/j.earscirev.2023.104592
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Hadean mantle oxidation inferred from melting of peridotite under lower-mantle conditions (2023)
  • Author(s): Kuwahara Hideharu、Nakada Ryoichi、Kadoya Shintaro、Yoshino Takashi、Irifune Tetsuo
  • Journal Title: Nature Geoscience Volume: - Issue: 5 Pages: 461-465
  • DOI: 10.1038/s41561-023-01169-4
  • Peer Reviewed
• [Journal Article] Investigation of Solid?Solid Transition in Ti and Zr at High Pressure by Electrical Resistivity (2023)
  • Author(s): Ezenwa Innocent C.、Yoshino Takashi
  • Journal Title: physica status solidi (b) Volume: 2023 Issue: 7 Pages: 2300079-2300079
  • DOI: 10.1002/pssb.202300079
  • Peer Reviewed / Open Access
• [Journal Article] Effect of iron content on thermal conductivity of ferropericlase: implications for planetary mantle dynamics. (2023)
  • Author(s): Y. Zhang, T. Yoshino, M. Osako
  • Journal Title: Geophysical Research Letters Volume: 51 Issue: 7
  • DOI: 10.1029/2022gl101769
  • Peer Reviewed / Open Access
• [Journal Article] Seismic Anisotropy in the Lower Mantle Transition Zone Induced by Lattice Preferred Orientation of Akimotoite (2022)
  • Author(s): Guan Longli、Yamazaki Daisuke、Tsujino Noriyoshi、Tange Yoshinori、Higo Yuji
  • Journal Title: Geophysical Research Letters Volume: 49 Issue: 11 Pages: 1-9
  • DOI: 10.1029/2022gl098549
  • Peer Reviewed / Open Access
• [Journal Article] Viscosity of bridgmanite determined by in situ stress and strain measurements in uniaxial deformation experiments (2022)
  • Author(s): Noriyoshi Tsujino, Daisuke Yamazaki, Yu Nishihara, Takashi Yoshino, Yuji Higo, Yoshinori Tange
  • Journal Title: Science Advances Volume: 8 Issue: 13 Pages: 1821-1821
  • DOI: 10.1126/sciadv.abm1821
  • Peer Reviewed / Open Access
• [Journal Article] Radiative thermal conductivity of single-crystal bridgmanite at the core-mantle boundary with implications for thermal evolution of the Earth (2022)
  • Author(s): Murakami Motohiko、Goncharov Alexander F.、Miyajima Nobuyoshi、Yamazaki Daisuke、Holtgrewe Nicholas
  • Journal Title: Earth and Planetary Science Letters Volume: 578 Pages: 117329-117329
  • DOI: 10.1016/j.epsl.2021.117329
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] A cotunnite-type new high-pressure phase of Fe2S (2022)
  • Author(s): Oka Kenta、Tateno Shigehiko、Kuwayama Yasuhiro、Hirose Kei、Nakajima Yoichi、Umemoto Koihiro、Tsujino Noriyoshi、Kawaguchi Saori I.
  • Journal Title: American Mineralogist Volume: 107 Issue: 7 Pages: 1249-1253
  • DOI: 10.2138/am-2022-7959
  • Peer Reviewed
• [Journal Article] Oxygen isotopes of anhydrous primary minerals show kinship between asteroid Ryugu and comet 81P/Wild2 (2022)
  • Author(s): Kawasaki Noriyuki、Nagashima Kazuhide、Sakamoto Naoya、Matsumoto Toru、Bajo Ken-ichi、Wada Sohei、Igami Yohei、Miyake Akira、Noguchi Takaaki、Yamamoto Daiki ... Yabuta Hikaru ... et al.
  • Journal Title: Science Advances Volume: 8 Issue: 50 Pages: 1-10
  • DOI: 10.1126/sciadv.ade2067
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Interaction of carbonates with peridotite containing iron metal: Implications for carbon speciation in the upper mantle (2022)
  • Author(s): Martirosyan N.S.、Shatskiy A.、Litasov K.D.、Sharygin I.S.、Yoshino T.
  • Journal Title: Lithos Volume: 428-429 Pages: 106817-106817
  • DOI: 10.1016/j.lithos.2022.106817
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Formation and decomposition of vacancy-rich clinopyroxene in a shocked eucrite: New insights for multiple impact events (2022)
  • Author(s): Zhang Ai-Cheng、Li Jie-Ya、Chen Jia-Ni、Wen Yuan-Yun、Guo Yan-Jun、Li Yang、Sakamoto Naoya、Yurimoto Hisayoshi
  • Journal Title: Geochimica et Cosmochimica Acta Volume: 329 Pages: 38-50
  • DOI: 10.1016/j.gca.2022.05.017
  • Peer Reviewed / Int'l Joint Research
• [Presentation] Viscosity of the lowermost lower mantle inferred from deformation of NaNiF3 as an analogue of (Mg,Fe)SiO3 (2024)
  • Author(s): Daisuke YAMAZAKI
  • Organizer: JpGU
  • Int'l Joint Research
• [Presentation] マルチアンビル加圧方式での圧力発生 (2024)
  • Author(s): 山崎大輔
  • Organizer: 高圧討論会
• [Presentation] Deformation experiments on NaNiF3 perovskite and post-perovskite (2023)
  • Author(s): Daisuke YAMAZAKI, Daijo IKUTA, Kayan LAU, Chao LIU, Takashi YOSHINO, Noriyoshi TSUJINO, Sho KAKIZAWA, Yuji HIGO, Yu NISHIHARA
  • Organizer: Japan Geoscience Union Meeting2023
  • Int'l Joint Research
• [Presentation] Electrical resistance of Fe2O3 at high pressure (2023)
  • Author(s): Daisuke Yamazaki
  • Organizer: Airapt2023
  • Int'l Joint Research
• [Presentation] High Pressure Generation in a Kawai-type Multianvil Apparatus Equipped with Sintered Diamond Anvils and Electrical Resistance of Fe2O3 at High Pressure (2023)
  • Author(s): Daisuke Yamazaki
  • Organizer: IPPS workshop
  • Int'l Joint Research / Invited
• [Presentation] Fe2O3の高圧下での電気抵抗測定 (2023)
  • Author(s): 山崎大輔
  • Organizer: 高圧討論会
• [Presentation] Self-diffusion of hcp-iron and viscosity of the inner core (2022)
  • Author(s): Daisuke YAMAZAKI, Naoya SAKAMOTO, Hisayoshi YURIMOTO
  • Organizer: Japan Geoscience Union Meeting2022
  • Int'l Joint Research
• [Presentation] Fe2O3の高圧下での電気抵抗変化 (2022)
  • Author(s): 山崎大輔
  • Organizer: 第63回高圧討論会