Experimental Studies on Melting (Mg, Fe)O Ferropericlase

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项目编号	1551348
	Experimental Studies on Melting (Mg, Fe)O Ferropericlase
	Kanani Lee
主持机构	Yale University
项目开始年	2016
	2016-01-15
项目结束日期	2018-12-31
资助机构	US-NSF
项目类别	Standard Grant
项目经费	336787(USD)
国家	美国
语种	英语
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.
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/69083
专题	环境与发展全球科技态势
推荐引用方式 GB/T 7714	Kanani Lee.Experimental Studies on Melting (Mg, Fe)O Ferropericlase.2016.