| 项目编号: | 1551348
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| 项目名称: | Experimental Studies on Melting (Mg, Fe)O Ferropericlase |
| 作者: | Kanani Lee
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| 承担单位: | Yale University
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| 批准年: | 2016
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| 开始日期: | 2016-01-15
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| 结束日期: | 2018-12-31
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| 资助金额: | 336787
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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: | earth
; formation
; composition
; behavior
; core-mantle
; core-mantle boundary
; condition
; two-third
; original composition
; thermo-chemical evolution
; other solar system
; compositional heterogeneity
; ideal solid solution behavior
; high-temperature condition
; mantle
; several factor
; laser-heated diamond-anvil cell
; other planet
; 2-dimensional mapping
; planetary accretion
; continental growth
; constituent phase
; subsequent evolution
; experimental investigation
; magma ocean
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| 英文摘要: | The origin and subsequent evolution of the Earth and other planets in our own and other solar systems is dictated by several factors including original composition and the melt behavior of the constituent phases. However, estimates of the melting temperature of Earth's mantle, which comprises more than three-quarters of the Earth's volume and nearly two-thirds of its mass, remain controversial and elusive. The conditions at which the mantle melts and solidifies is especially important for understanding compositional heterogeneity, which constrains deep structure and mixing and is crucial for inferring the thermo-chemical evolution of the Earth, from planetary accretion and the magma ocean, to continental growth, the formation of the oceans and atmosphere, and the current state of the core-mantle boundary.
The melt behavior of one of the most abundant minerals in the mantle, ferropericlase (Mg, Fe)O, at high pressures will test hypotheses on Earth's formation and elucidate the geochemistry of the deep mantle. Experiments conducted at pressures corresponding to depths greater than ~1200 km suggests that an ideal solid solution behavior becomes more eutectic-like with increasing pressure. The experiments will be studied by 2-dimensional mapping of temperature, composition and texture of sample materials placed under the extreme high-pressure, high-temperature conditions of the Earth's early mantle as produced by a laser-heated diamond-anvil cell, in order to identify the conditions at which melting occurs and its subsequent influence on the composition and morphology of the molten and surrounding regions. Additionally, this experimental investigation will help constrain current temperatures of the Earth by estimating the temperatures at the core-mantle boundary. |
| 资源类型: | 项目
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/92926
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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: | |
Kanani Lee. Experimental Studies on Melting (Mg, Fe)O Ferropericlase. 2016-01-01.
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