Flow and Melt Distribution in Deformed Partially Molten Mantle Rocks: Implications for Focusing of Melt and Seismic Anisotropy at Mid-Ocean Ridges

变形部分熔融地幔岩石中的流动和熔体分布：对大洋中脊熔体和地震各向异性聚焦的影响

• 批准号: 9529744
• 负责人: David Kohlstedt
• 金额: $ 20.5万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-11-15 至 2000-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9529744&HistoricalAwards=false
• 关键词: Flow; Melt; Distribution; Deformed; Partially

The velocity of seismic waves and the electrical conductivity of the oceanic crust and mantle at mid-ocean ridges depend on how melt is distributed around mineral grains. The strength of the mantle also depends how much melt is present, so flow of the mantle is strongly dependent on the amount of melt. The investigators want to examine several aspects of melt distribution with laboratory experiments on mantle rocks. The experiments will determine how the strength of the rocks depends on the presence of water, and temperature, and strain. They will also determine how melt is distributed in the rocks. The results of these experiments will be applied to measurements of seismic wave velocities and electrical conductivity that are being undertaken on a mid ocean ridge.

地震波的速度以及海洋地壳和地幔在中山脊的电导率取决于熔体在矿物颗粒周围的分布方式。 地幔的强度还取决于存在多少熔体，因此地幔的流量很大程度上取决于熔体的量。 研究人员希望通过实验室实验在地幔岩石上进行熔体分布的几个方面。 实验将决定岩石的强度如何取决于水，温度和应变的存在。 他们还将确定熔体是如何分布在岩石中的。 这些实验的结果将应用于在海脊中进行的地震波速度和电导率的测量。