US-France Cooperative Research: Experimental Measurements of the Diffusion Coefficients in Minerals of the Transition Zone of the Earth's Mantle

0233152利伯曼获得了为期三年的美法地球科学合作奖，获奖者包括纽约州立大学斯托尼布鲁克分校的罗伯特·利伯曼、法国图卢兹保罗·萨巴蒂尔大学的弗雷德里克·贝伊纳和奥利维耶·雅乌尔。 该项目的重点是测量构成地球内部过渡区的高压矿物的扩散系数。 具体来说，研究人员将测量硅在硅镁石中的扩散和镁在硅镁石中的扩散。 这些扩散系数的测量对于理解高压矿物的点缺陷化学是至关重要的。 反过来，这将阐明发生在地球内部深处的动力学过程。 美国和法国的调查人员将在斯托尼布鲁克的高压实验室对材料进行扩散实验。 然后将使用法国的货车德格拉夫加速器，通过核微量分析技术对这些材料进行分析。该奖项代表了美国方面向NSF和CNRS提出的平行建议。 NSF将支付美国研究者的差旅费和生活费。CNRS将支持法国研究人员和学生访问美国。

0233152LiebermannThis three-year award for US-France collaboration in earth sciences involves Robert Liebermann of the State University of New York at Stony Brook, Frederic Bejina and Olivier Jaoul at the University Paul Sabatier in Toulouse, France. The project focuses on the measurement of diffusion coefficients in high-pressure minerals, which constitute the transition zone of the Earth's interior. Specifically, the investigators will measure silicon diffusion in stishovite and magnesium diffusion in wadsleyite. The measurements of these diffusion coefficients are critical to understanding point defect chemistry of high-pressure minerals. In turn, this will elucidate kinetic processes occurring in the deep interior of the Earth. The US and French investigators will conduct diffusion experiments on materials at the High Pressure laboratory at Stony Brook. The materials will then be analyzed by nuclear microanalysis techniques using a Van De Graaf accelerator in France. This award represents the US side of parallel proposals to the NSF and the CNRS. NSF will cover travel funds and living expenses for the US investigator. The CNRS will support visits by French researchers and students to the United States.