| 项目编号: | 1520726
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| 项目名称: | Aluminous phase at high-pressures & temperatures: Elasticity and Energetics of hydrogen incorporation |
| 作者: | Mainak Mookherjee
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| 承担单位: | Cornell University
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| 批准年: | 2014
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| 开始日期: | 2015-07-01
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| 结束日期: | 2016-03-31
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| 资助金额: | USD101230
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| 资助来源: | US-NSF
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| 项目类别: | Continuing grant
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| 国家: | US
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| 语种: | 英语
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| 特色学科分类: | Geosciences - Earth Sciences
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| 英文关键词: | energetic
; aluminous mineral phase
; mineral phase
; hydrogen incorporation
; earth
; mantle
; aluminous phase
; high pressure
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| 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. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/94053
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| Appears in Collections: | 影响、适应和脆弱性
气候减缓与适应
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| Recommended Citation: | |
Mainak Mookherjee. Aluminous phase at high-pressures & temperatures: Elasticity and Energetics of hydrogen incorporation. 2014-01-01.
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