1998 Fiscal Year Annual Research Report

含水変型スピネル及び含水スピネル相の状態方程式

Research Project

Project/Area Number	09740397
Research Institution	Ehime University
Principal Investigator	井上徹愛媛大学, 理学部, 助手 (00291500)
Keywords	hydrous phase / phase transition / mantle mineral / elastic constant / rheology / crystal stracture / dehydration / H_2O
Research Abstract	本年度は高温高圧下で合成されたhydrous β-phase(wadsleyite)及びhydrous γ-phase(ringwoodite)を使い、各種の物性測定を行った。その1つはhydrous γ-phaseの単結晶を使い、ブリルアン散乱法により弾性定数を決定した。その結果、体積弾性率は155±4GPa,剛性率は107±3GPaと求まり、この値は無水のγ-phaseよりそれぞれ16%,11%小さいことを見いだした(Inoue et al.,1998)。また、各種オリビンの高圧多形のレオロジーをニューヨーク州立大学ストニーブルックのグループと一緒に、無水系含水系で決定した(Chen et al.,1998)。また、高圧下での単結晶構造解析も行い、圧力による結晶構造の変化も捉えた(Kudoh and Inoue,1998)。ラマン分光による物性測定も行った(Liu et al,1998)。さらに、放射光を使ったその場観察実験により、現在hydrous β-phaseの状態方程式を決定している。放射光実験の他のテーマとしては、ポストスピネル相転移圧の精密決定を行った(Irifune et al.,1998)。現在までの成果の総まとめとして、「マントル物質の相平衡及び鉱物物性に対するH_2Oの影響」としてレビュー論文を執筆した(井上,1998)。また、マントル中へのH_2Oの運搬の候補として、K-amphiboleに注目し、その脱水分解反応の相平衡図を決めるとともに、島弧海溝系の火山活動との関連について言及した(Inoue et al.,1998)。

Research Products

(10 results)

All Other

All Publications (10 results)

[Publications] T.Inoue,T.Irifune H.Yurimoto and I.Miyagi: "Decomposition of K-amphibole at high pressures and implications for subduction zone volcanism" Physics of Earth and Planetary Interiors. 107. 221-231 (1998)
[Publications] 井上徹: "マントル物質の相平衡及び鉱物物性に対するH_2の影響" 鉱物学雑誌. 27. 57-68 (1998)
[Publications] T.Inoue: "The Effect of water in the Earth'smantle materials" Proceedings of the 5th NIRIM Intarnational Symposium on Akuarod Materlial. 249-252 (1998)
[Publications] T.Irifune,K.Kuroda,N.Nishiyama T.Inoue 他9名: "X-ray diffraction measurements in a double stage multiahvil apposatys using AOC anuils" High Pressure-Temperaturs Research:Properties of Earth and Planetary Materials at High Pressure and Temperature. 1-8 (1998)
[Publications] Y.Kudoh and T.Inoue: "Effect of pressure on the crystal structure of hydrous wadsleyite,Mg1.75 SiHosH_4" High Pressura-Temperature Research:Properties of Earth and Planetary Materials at High Pressurs and Temperature. 517-521 (1998)
[Publications] L-G.Lin,T.P.Monagh,C-C.Lin J-A.Xu and T.Inoue: "Raman spectra of hydrocs β-Mg_2SiO_44 at variou pressures and temperatures" High Pressure-Temperature Research:Properties of Earth and Planetary Materials at High Pressure and Temperoture. 523-530 (1998)
[Publications] J.Chen,T.Inoue,D.J.Weidner Y.Wu and M.T.Vaugher: "Strength and watar weaking of mantleaminerals,oliviue,wadslayite and riugwoodite" Geophysical Research Letters. 25. 575-578 (1998)
[Publications] T.Irifune,Nishiyama,K.kuroda T.Inoue 他7名: "The post spinel phase boundary in Mg_2SiO_4 determicned by in-situ X-rey diffraction" Seienoe. 279. 1698-1700 (1998)
[Publications] T.Inoue,D.J.Weidner D.A.Northrup and J.B.Povise: "Elastic properties of hydrous ringwoofite(β-phase)in Mg_2SiO_4" Earth and Planetary Scienes Letters. 160. 107-113 (1998)
[Publications] Y.Kudoh and T.Inoue: "Mg-vacant structure modules and dilution of the symmetry of hydrous wadsleyite,β-Mg_<2-x>SiH_2O_4 with 000【less than or equal】×【less than or equal】0.25" Physics and Chemistry of Minerals. in press.

1998 Fiscal Year Annual Research Report

含水変型スピネル及び含水スピネル相の状態方程式

Principal Investigator

井上 徹 愛媛大学, 理学部, 助手 (00291500)

Research Products

[Publications] T.Inoue,T.Irifune H.Yurimoto and I.Miyagi: "Decomposition of K-amphibole at high pressures and implications for subduction zone volcanism" Physics of Earth and Planetary Interiors. 107. 221-231 (1998)

[Publications] 井上徹: "マントル物質の相平衡及び鉱物物性に対するH_2の影響" 鉱物学雑誌. 27. 57-68 (1998)

[Publications] T.Inoue: "The Effect of water in the Earth'smantle materials" Proceedings of the 5th NIRIM Intarnational Symposium on Akuarod Materlial. 249-252 (1998)

[Publications] T.Irifune,K.Kuroda,N.Nishiyama T.Inoue 他9名: "X-ray diffraction measurements in a double stage multiahvil apposatys using AOC anuils" High Pressure-Temperaturs Research:Properties of Earth and Planetary Materials at High Pressure and Temperature. 1-8 (1998)

[Publications] Y.Kudoh and T.Inoue: "Effect of pressure on the crystal structure of hydrous wadsleyite,Mg1.75 SiHosH_4" High Pressura-Temperature Research:Properties of Earth and Planetary Materials at High Pressurs and Temperature. 517-521 (1998)

[Publications] L-G.Lin,T.P.Monagh,C-C.Lin J-A.Xu and T.Inoue: "Raman spectra of hydrocs β-Mg_2SiO_44 at variou pressures and temperatures" High Pressure-Temperature Research:Properties of Earth and Planetary Materials at High Pressure and Temperoture. 523-530 (1998)

[Publications] J.Chen,T.Inoue,D.J.Weidner Y.Wu and M.T.Vaugher: "Strength and watar weaking of mantleaminerals,oliviue,wadslayite and riugwoodite" Geophysical Research Letters. 25. 575-578 (1998)

[Publications] T.Irifune,Nishiyama,K.kuroda T.Inoue 他7名: "The post spinel phase boundary in Mg_2SiO_4 determicned by in-situ X-rey diffraction" Seienoe. 279. 1698-1700 (1998)

[Publications] T.Inoue,D.J.Weidner D.A.Northrup and J.B.Povise: "Elastic properties of hydrous ringwoofite(β-phase)in Mg_2SiO_4" Earth and Planetary Scienes Letters. 160. 107-113 (1998)

[Publications] Y.Kudoh and T.Inoue: "Mg-vacant structure modules and dilution of the symmetry of hydrous wadsleyite,β-Mg_<2-x>SiH_2O_4 with 000【less than or equal】×【less than or equal】0.25" Physics and Chemistry of Minerals. in press.

井上徹愛媛大学, 理学部, 助手 (00291500)