The Effects of Olivine Anisotropy on Liquid Distribution, Seismic, and Electrical Properties of Partial Melts of the Upper Mantle

橄榄石各向异性对上地幔部分熔体的液体分布、地震和电学性质的影响

• 批准号: 9219193
• 负责人: Harve Waff
• 金额: $ 11万
• 依托单位: University of Oregon Eugene
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-07-15 至 1995-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9219193&HistoricalAwards=false
• 关键词: Effects; Olivine; Anisotropy; Liquid; Distribution; Effects; Olivine; Anisotropy; Liquid; Distribution

This is an experimental investigation of the shapes of melt inclusions in upper mantle partial melts. This investigation is motivated by the observation that the crystal-melt morphology of experimentally produced samples is not consistent with theoretically predicted smoothly curved crystal-melt interfaces. The melt geometry has a paramount effect on seismic velocities, and the data can be applied to model the upper mantle velocity structure in the presence of melt. Analysis of digital backscattered electron images of the post-run samples will be used to obtain the parameters needed (such as the aspect ration of melt inclusions, their area, the total melt fraction) to calculate seismic velocities, based on established models of elastic, anelasic and electrical properties of partially molten rocks. This is a promising new approach to characterize the melt distribution in upper mantle systems.

这是对上地幔部分熔体熔体夹杂物的形状的实验研究。 这项研究是由观察到的，即实验产生的样品的晶体融合形态与理论上预测的平滑弯曲的晶体熔体界面不一致。 熔体的几何形状对地震速度具有至关重要的作用，并且可以将数据应用于在熔体存在下建模地幔速度结构。 分析数字反向散射的电子图像将用于获得所需的参数（例如熔体夹杂物，其面积，总熔体分数的方面评分），以根据既定的弹性，肛门和电性能的固定模型来计算地震速度。 这是一种表征上地幔系统中熔体分布的新方法。