固体地球科学(S)
セッション小記号地球内部科学・地球惑星テクトニクス
セッションIDS-IT19
タイトル和文Mineral-melt-fluid interaction and COHN volatile speciation in Earth and planetary
英文Mineral-melt-fluid interaction and COHN volatile speciation in Earth and planetary
タイトル短縮名和文COHN volatiles the Earth and planets
英文COHN volatiles the Earth and planets
代表コンビーナ氏名和文Mysen Bjorn
英文Bjorn Mysen
所属和文Geophysical Laboratory, Carnegie Inst. Washington
英文Geophysical Laboratory, Carnegie Inst. Washington
共同コンビーナ 1氏名和文大谷 栄治
英文Eiji Ohtani
所属和文東北大学大学院理学研究科地学専攻
英文Department of Earth and Planetary Materials Science, Graduate School of Science, Tohoku University
共同コンビーナ 2氏名和文土屋 旬
英文Jun Tsuchiya
所属和文愛媛大学地球深部ダイナミクス研究センター
英文Geodynamics Research Center, Ehime University
発表言語EE
スコープ和文
英文This session addresses how volatile species in the COHN system affect the geochemistry, mineralogy, and geophysics of the Earth and planetary interior from natural observations, laboratory experiments, and numerical modeling in the temperature, pressure, and oxygen activity range from the early stage of the planet formation to the present.
The COHN volatiles can be critical in zones of mantle upwelling and melting, in the fluid-enriched subduction zones, in the mantle transition zone, in the lower mantle to the core-mantle boundary, and in Earth and planetary cores. However, COHN volatiles affect properties and processes differently depending on their oxidation state, and terrestrial and planetary redox conditions vary in time and space. For example, properties of the upper mantle, which is often oxidizing and comprise CO2, H2O, and N2, will differ from those of the deeper mantle where more reducing conditions may stabilize H2O, H2, simple hydrocarbon, ammonia, hydrides, carbides, and nitrides. This difference is because reduced C- and N-bearing species may substitute for oxygen in silicate melts and minerals, whereas C- and N-bearing oxidizing species, such as CO2, H2O, and N2 do not.
This session will address how volatiles control the dynamic processes of Earth and planets, governed by their geophysical and geochemical properties, from geological and laboratory observations coupled with numerical modeling. The topics include (1) Stability relations, chemical and physical properties of crystalline, molten and fluid phases, and partitioning of COHN volatiles among these phases, (2) Stable isotopes, and their fractionation due to pressure and redox conditions, (3) Rheological properties of geomaterials, intergranular fluid, and fluid composition, (4) Seismicity and the influence of volatiles in various tectonic regions including subduction zones. (5) Effects of fluids and melts in numerical simulation of geo-tectonics.
発表方法口頭および（または）ポスターセッション
招待講演
  • Daniel James Frost (Bayerisches Geoinstitut, University of Bayreuth)
  • Zhu Mao (University of Science and Technology of China)
時間 講演番号 タイトル 発表者 予稿原稿
口頭発表 5月20日 AM1
09:00 - 09:15 SIT19-01The effect of pressure and oxygen fugacity on the ferric-ferrous ratio of silicate meltsDaniel James Frost予稿
09:15 - 09:30 SIT19-02Melting phase relation of Fe-bearing PhD up to the uppermost lower mantle and transportation of H2O to the deep EarthChaowen Xu予稿
09:30 - 09:45 SIT19-03Fate of slab water in arc–backarc–stagnant slab and beyond木村 純一予稿
09:45 - 10:00 SIT19-04Locating hydrogen in lower mantle transition zone hydrous ringwooditeNarangoo Purevjav予稿
10:00 - 10:15 SIT19-05Experimental constraints on the dihedral angle between olivine and multicomponent aqueous fluids in the upper mantle conditionsYongsheng HUANG予稿
10:15 - 10:30 SIT19-06Dehydration kinetics of talc in the system MgO-SiO2-H2O probed in-situ by vibrational spectroscopy at high pressure and high temperature山下 茂予稿
口頭発表 5月20日 AM2
10:45 - 11:00 SIT19-07Elasticity of superhydrous phase B at the mantle temperature and pressure: Implications for 800-km discontinuity and water flow into lower mantleZhongqing Wu予稿
11:00 - 11:15 SIT19-08Incorporation of nitrogen into the lower-mantle minerals under high pressure and high temperature
-Transportation and storage of nitrogen in the deep earth-		福山 鴻予稿
11:15 - 11:30 SIT19-09Determination of 15N/14N ratios in reduced silicate glasses using Raman spectroscopy.Celia Dalou予稿
11:30 - 11:45 SIT19-10Phase Stability and Thermal Equation of State of δ-AlOOH: Implication for Origin of the ULVZZhu Mao予稿
11:45 - 12:00 SIT19-11First principles investigation of the vibrational properties of hydrous wadsleyite and hydrous ringwoodite土屋 旬予稿
12:00 - 12:15 SIT19-12Computational study of the quantum fluctuation on the δ-AlOOH crystal structure河津 励予稿
講演番号 タイトル 発表者 予稿原稿
ポスター発表 5月20日 コア
SIT19-P01 Chemical reactions between Fe and H2O up to megabar pressures and implications for water storage in the Earth’s mantle and core Liang Yuan 予稿
SIT19-P02 石英ガラスにおける水の高速拡散 黒田 みなみ 予稿