JpGU Meeting 2018
Session outline| Solid Earth Sciences(S) | ||
|---|---|---|
| Session Sub-category | Science of the Earth's Interior & Tectonophysics | |
| Session ID | S-IT19 | |
| Title | Mineral-melt-fluid interaction and COHN volatile speciation in Earth and planetary | |
| Short Title | COHN volatiles the Earth and planets | |
| Main Convener | Name | Bjorn Mysen |
| Affiliation | Geophysical Laboratory, Carnegie Inst. Washington | |
| Co-Convener 1 | Name | Eiji Ohtani |
| Affiliation | Department of Earth and Planetary Materials Science, Graduate School of Science, Tohoku University | |
| Co-Convener 2 | Name | Jun Tsuchiya |
| Affiliation | Geodynamics Research Center, Ehime University | |
| Session Language | EE | |
| Scope | 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. | |
| Presentation Format | Oral and Poster presentation | |
| Invited Authors |
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| Time | Presentation No | Title | Presenter | Abstract |
|---|---|---|---|---|
| Oral Presentation May 20 AM1 | ||||
| 09:00 - 09:15 | SIT19-01 | The effect of pressure and oxygen fugacity on the ferric-ferrous ratio of silicate melts | Daniel James Frost | Abstract |
| 09:15 - 09:30 | SIT19-02 | Melting phase relation of Fe-bearing PhD up to the uppermost lower mantle and transportation of H2O to the deep Earth | Chaowen Xu | Abstract |
| 09:30 - 09:45 | SIT19-03 | Fate of slab water in arc–backarc–stagnant slab and beyond | Jun-Ichi Kimura | Abstract |
| 09:45 - 10:00 | SIT19-04 | Locating hydrogen in lower mantle transition zone hydrous ringwoodite | Narangoo Purevjav | Abstract |
| 10:00 - 10:15 | SIT19-05 | Experimental constraints on the dihedral angle between olivine and multicomponent aqueous fluids in the upper mantle conditions | Yongsheng HUANG | Abstract |
| 10:15 - 10:30 | SIT19-06 | Dehydration kinetics of talc in the system MgO-SiO2-H2O probed in-situ by vibrational spectroscopy at high pressure and high temperature | Shigeru Yamashita | Abstract |
| Oral Presentation May 20 AM2 | ||||
| 10:45 - 11:00 | SIT19-07 | Elasticity of superhydrous phase B at the mantle temperature and pressure: Implications for 800-km discontinuity and water flow into lower mantle | Zhongqing Wu | Abstract |
| 11:00 - 11:15 | SIT19-08 | Incorporation of nitrogen into the lower-mantle minerals under high pressure and high temperature -Transportation and storage of nitrogen in the deep earth- | Ko Fukuyama | Abstract |
| 11:15 - 11:30 | SIT19-09 | Determination of 15N/14N ratios in reduced silicate glasses using Raman spectroscopy. | Celia Dalou | Abstract |
| 11:30 - 11:45 | SIT19-10 | Phase Stability and Thermal Equation of State of δ-AlOOH: Implication for Origin of the ULVZ | Zhu Mao | Abstract |
| 11:45 - 12:00 | SIT19-11 | First principles investigation of the vibrational properties of hydrous wadsleyite and hydrous ringwoodite | Jun Tsuchiya | Abstract |
| 12:00 - 12:15 | SIT19-12 | Computational study of the quantum fluctuation on the δ-AlOOH crystal structure | Tsutomu Kawatsu | Abstract |
| Presentation No | Title | Presenter | Abstract |
|---|---|---|---|
| Poster Presentation May 20 Core Time | |||
| 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 | Abstract |
| SIT19-P02 | Fast water diffusion in silica glass | Minami Kuroda | Abstract |