Experimental Petrology of Garnet Lherzolite Melting
石榴石二辉橄榄岩熔炼的实验岩石学
基本信息
- 批准号:0001245
- 负责人:
- 金额:$ 15.35万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2000
- 资助国家:美国
- 起止时间:2000-07-01 至 2003-06-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
LesherEAR-0001245This program investigates melting of nominally anhydrous garnet peridotite between 3 and 5.5 GPa using the octahedral multianvil apparatus. The goals of the experiments are determination of 1) high pressure solidii in P-T space, 2) the compositions of near-solidus melts and crystals, 3) the specifics of the melting reaction, and 4) the functional relationships between temperature and melt fraction required to determine melt productivity. We are performing experiments on a range of garnet lherzolite compositions that differ in the proportion of clinopyroxene. These compositions extend the observational basis for peridotite melting of typical MORB mantle to possible analogs for plume mantle. The experiemts employ micro-exchange techniques to characterize the compositions of melt fractions below 0.1, and more classical approaches at higher melt fractions. Exhaustive P-T calibration work in our laboratory above 3 GPa ensures a level of reproducibility and control of sample environment in the multianvil apparatus similar to that routinely achieved in the piston-cylinder apparatus at lower pressures. The fundamental phase equilibrium data at high pressures obtained in this study will contribution to the very limited experimental database for garnet peridotite melting. Such data are essential for quantitative modeling of melting of peridotite by mantle upwelling beneath ocean spreading ridges, oceanic lithosphere, and continents.
Lesherkan-0001245该程序使用八面体多砧装置研究了3 - 5.5 GPa之间名义上无水石榴石橄榄岩的熔融。实验的目的是确定1)P-T空间中的高压凝固,2)近固相线熔体和晶体的组成,3)熔化反应的细节,和4)确定熔体生产率所需的温度和熔体分数之间的函数关系。我们正在对一系列石榴石二辉橄榄岩成分进行实验,这些成分在单斜辉石的比例上不同。这些组成扩展了典型MORB地幔橄榄岩熔融的观测基础,可能类似于地幔柱。实验采用微交换技术来表征低于0.1的熔体分数的组成,并在较高的熔体分数下采用更经典的方法。我们实验室在3GPa以上的详尽P-T校准工作确保了多砧装置中样品环境的再现性和控制水平,类似于在较低压力下活塞-气缸装置中常规实现的水平。本研究所获得的高压下的基本相平衡数据,将有助于丰富石榴橄榄岩熔融的有限实验数据。这些数据是必不可少的定量模拟地幔上涌下洋展脊,大洋岩石圈和大陆的橄榄岩熔融。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Charles Lesher其他文献
Charles Lesher的其他文献
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{{ truncateString('Charles Lesher', 18)}}的其他基金
Collaborative Research: Physical properties and structure of silicate melts and supercooled liquids at high pressures
合作研究:高压硅酸盐熔体和过冷液体的物理性质和结构
- 批准号:
1215714 - 财政年份:2012
- 资助金额:
$ 15.35万 - 项目类别:
Standard Grant
Collaborative Proposal: Integrated Investigations of Isotope Fractionation in Magmatic Systems
合作提案:岩浆系统中同位素分馏的综合研究
- 批准号:
1019887 - 财政年份:2010
- 资助金额:
$ 15.35万 - 项目类别:
Standard Grant
EAGER: Collaborative Research: Collaborative Investigations of Isotopic Fractionation by Thermal Diffusion and Thermal Migration
EAGER:协作研究:通过热扩散和热迁移进行同位素分馏的协作研究
- 批准号:
0943992 - 财政年份:2009
- 资助金额:
$ 15.35万 - 项目类别:
Standard Grant
Collaborative Research: Properties of Melts and Supercooled Liquids at High Pressure by In Situ X-ray Computed Tomography and Absorption
合作研究:通过原位 X 射线计算机断层扫描和吸收研究熔体和过冷液体在高压下的特性
- 批准号:
0711599 - 财政年份:2008
- 资助金额:
$ 15.35万 - 项目类别:
Standard Grant
Rheology and Densities of Silicate Melts in the Upper Mantle
上地幔硅酸盐熔体的流变性和密度
- 批准号:
0511049 - 财政年份:2005
- 资助金额:
$ 15.35万 - 项目类别:
Continuing Grant
Collaborative Research: The Effects of Melt Depletion on Mantle Density and Velocity
合作研究:熔体消耗对地幔密度和速度的影响
- 批准号:
0409375 - 财政年份:2004
- 资助金额:
$ 15.35万 - 项目类别:
Standard Grant
Igneous Petrology of the New Skaergaard Stratigraphic Reference Column
新斯卡尔加德地层参考柱的火成岩岩石学
- 批准号:
0208075 - 财政年份:2002
- 资助金额:
$ 15.35万 - 项目类别:
Standard Grant
Offset Drilling on the Southeast Greenland Volcanic Rifted Margin: UCDavis Participation on the 1998 DLC Drilling Cruise
格陵兰东南部火山裂谷边缘的偏置钻探:UCDavis 参与 1998 年 DLC 钻探巡航
- 批准号:
9811453 - 财政年份:1998
- 资助金额:
$ 15.35万 - 项目类别:
Standard Grant
Early Magmatic Evolution of the East Greenland Volcanic Rifted Margin
东格陵兰火山裂谷边缘的早期岩浆演化
- 批准号:
9706677 - 财政年份:1997
- 资助金额:
$ 15.35万 - 项目类别:
Standard Grant
Development of a Cubic-Anvil Experimental Facility for High Pressure and Current Sintering of Bulk Nanocrystalline Materials
块体纳米晶材料高压电流烧结立方砧实验装置的研制
- 批准号:
9704237 - 财政年份:1997
- 资助金额:
$ 15.35万 - 项目类别:
Standard Grant
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