U.S.-Australia Cooperative Research: High Temperature Wave Speeds of Mantle Minerals and Their Seismological Implications

0233849利伯曼奖促进了由斯托尼布鲁克大学的罗伯特·利伯曼教授和位于澳大利亚堪培拉的澳大利亚国立大学的伊恩·杰克逊教授领导的两个世界级研究小组之间在物理学研究方面的合作。 近年来，这两个小组分别开发了新的实验技术，用于测量实验室制备的样品中弹性波速度的温度依赖性，这些样品准确地代表了地表以下400至700公里的地球过渡带的矿物。 他们计划利用这些数据来研究暴露在类似温度区域但压力区域非常不同的人造材料中波速的混合压力-温度依赖性。根据化学成分、矿物学和温度解释地球内部的地震学模型需要实验室获得的有关相关矿物弹性波速及其压力和温度依赖性的信息。 这种合作将通过并行使用各种互补技术来促进对这些关系的理解。 这项合作还将为几位早期职业/博士后科学家和研究生提供国际经验，其中一位来自一所历史悠久的黑人大学。增加对压力-温度依赖性的了解将改善对地幔内化学成分、矿物组成和温度变化的推断

0233849LiebermannThis award facilitates collaboration in geophysics research between two world class research groups led by Professor Robert Liebermann of Stony Brook University and Professor Ian Jackson of the Australian National University in Canberra, Australia. In recent years the two groups have separately developed novel experimental techniques for measuring the temperature dependence of elastic wave speeds in laboratory prepared specimens that accurately represent the minerals of the earth's transition zone, 400 to 700 km below the surface. They plan to use these to study the mixed pressure-temperature dependence of wave speeds in fabricated materials exposed to similar temperature regimes but very different pressure regimes.The interpretation of seismological models for the earth's interior in terms of chemical composition, mineralogy and temperature requires laboratory-derived information concerning the elastic wave speeds of the relevant minerals and also their pressure and temperature dependence. This collaboration will advance the understanding of these relations through the parallel use of various complementary techniques. The collaboration will also provide international experience for several early career/postdoctoral scientists and graduate students, including one from a historically black university.Increased knowledge of pressure-temperature dependence will improve the inference of chemical composition, mineralogical make-up and temperature variations within the earth's mantle