| 项目编号: | 1551300
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| 项目名称: | Physical Properties of Partially Molten Rocks from Microtomography Experiments and Digital Rock Physics |
| 作者: | Wen-Lu Zhu
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| 承担单位: | University of Maryland College Park
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| 批准年: | 2016
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| 开始日期: | 2016-02-01
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| 结束日期: | 2019-01-31
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| 资助金额: | 299086
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| 资助来源: | US-NSF
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| 项目类别: | Standard 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: | distribution
; sample
; molten rock
; digital rock physics simulation
; synchrotron microtomography
; molten mantle rock
; molten olivine rock
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| 英文摘要: | Melt generated in the interior of the Earth at plate boundaries plays an important role in the transfer of heat and mass and eventually feeds the volcanic activity of our planet. It is important to better constrain how much melt is present at depth and where it is present. Seismic and electromagnetic measurements provide data to constrain melt distribution but how to convert these data into melt fraction estimates remains a subject of contention. This project will analyze three-dimensional images of the distribution of melt in experimentally produced partially molten rocks and simulate several physical properties of these samples. Results from this study will make it possible to link seismic and electromagnetic data with models of melt transport in the interior of the Earth, which ultimately helps understand how plate tectonics works and the link between mantle processes and volcanic activity.
This study will use synchrotron microtomography to image partially molten mantle rocks in three-dimensions. The samples will be hydrostatically-annealed aggregates that consist of olivine and orthopyroxene in different proportions, and contain melt fractions of 0.005 to 0.20. Digital rock physics simulations will be performed to obtain permeability, electrical conductivity and elastic moduli of both hydrostatically annealed olivine + orthopyroxene-basaltic melt and sheared partially molten olivine rocks. Variation of melt content with distance in the sample will be analyzed to constrain the bulk viscosity of the sample. This project will quantify the effects of lithological partitioning due to the presence of orthopyroxene on melt distribution and show how deformation affects melt distribution, and induces permeability anisotropy. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/92908
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| Appears in Collections: | 全球变化的国际研究计划
科学计划与规划
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| Recommended Citation: | |
Wen-Lu Zhu. Physical Properties of Partially Molten Rocks from Microtomography Experiments and Digital Rock Physics. 2016-01-01.
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