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项目编号 | 1520726 |
Aluminous phase at high-pressures & temperatures: Elasticity and Energetics of hydrogen incorporation | |
Mainak Mookherjee | |
主持机构 | Cornell University |
项目开始年 | 2015 |
2015-07-01 | |
项目结束日期 | 2016-03-31 |
资助机构 | US-NSF |
项目类别 | Continuing grant |
项目经费 | 101230(USD) |
国家 | 美国 |
语种 | 英语 |
英文摘要 | Geophysical and geochemical observations provide insights into the physical and chemical states of the Earth's interior. However, only by comparing mineral physics data (physical properties) with geophysical (seismological) observations can we disentangle the thermal state of the deep Earth from its chemistry. Conventionally, as a first order approximation, the Earth's mantle is thought to be composed of a homogenous pyrolite. However, the distinct trace element signatures in mid ocean ridge and ocean island basalts reveal the heterogeneity in the Earth's mantle. Although the scale of the heterogeneity is unknown, it is likely that large regions of the mantle are composed of a depleted harzburgite and enriched crustal fractions. We have limited knowledge of the thermodynamics and physical properties of mineral phases in these subducted crusts at high pressures. In this proposal, the PI intends to use first principles calculations to investigate how chemistry influences crystal structure, energetics, and elasticity of aluminous mineral phases which are likely to be stabilized in deeply subducted oceanic and continental crusts. He will also investigate the energetics of hydrogen incorporation within these aluminous phases. The results will be relevant for geophysics, mineral-physics, geodynamics, petrology, and geochemistry sub disciplines. The PI will also train undergraduate student/s in Solid Earth Geosciences/Mineral Physics. |
来源学科分类 | Geosciences - Earth Sciences |
文献类型 | 项目 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/68119 |
专题 | 环境与发展全球科技态势 |
推荐引用方式 GB/T 7714 | Mainak Mookherjee.Aluminous phase at high-pressures & temperatures: Elasticity and Energetics of hydrogen incorporation.2015. |
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