US-France Cooperative Research: Chemical Kinetics of Ore andRock-Forming Minerals in Hydrothermal Systems

该奖项将支持大卫博士与 克雷拉，普林斯顿大学，和雅克肖特博士， 保罗·萨巴蒂尔大学，法国。 客观 本研究的目的是研究溶解速率和反应 方解石、萤石、石英等矿物质的作用机制， 长石在25摄氏度到400多摄氏度的水中。 在这个联合项目中，普林斯顿的热液实验室 大学将用于测量矿物反应速率， 它们随溶液组成和结晶度的变化 株 然后将通过表面分析来分析反应的晶体。 图卢兹及附属法国分光技术 提供反应过程详细信息的实验室 矿物表面的化学反应和矿物表面的动力学机制 反应性 这项工作可用于理解地层 在非平衡条件下的矿床， 上晶体过程，并应提供深入了解 放射性废物贮存库中流体和矿物的行为。 普林斯顿和图卢兹小组的研究已经被 与普林斯顿的热液研究互补， 溶解速率和过程，以及低T表面上的图卢兹 反应机理 这个项目将联合收割机结合他们的专业知识， 矿物反应动力学，并允许美国集团使用高 技术表面光谱和分析设施， 否则他们可以利用。

This award will support collaborative research between Dr. David Crerar, Princeton University, and Dr. Jacques Schott, Laboratoire de Geochimie, University of Paul Sabatier, France. The objective of this research is to study the dissolution rates and reaction mechanisms of minerals such as calcite, fluorite, quartz and feldspar in water from 25 degrees to over 400 degrees Centigrade. In this joint project, the hydrothermal laboratories at Princeton University will be used to measure mineral reaction rates, and their variation with solution composition and degree of crystal strain. The reacted crystals will then be analyzed by surface spectroscopic techniques in Toulouse and affiliated French laboratories to provide detailed information on reaction processes at mineral surfaces and the kinetic mechanisms of mineral reactivity. This work has application to understanding formation of mineral deposits under non-equilibrium conditions typical of upper crystal processes and should provide insight into the behavior of fluids and mineral in projected radwaste repositories. The research by the Princeton and Toulouse groups has been complementary, with Princeton concentrating on hydrothermal dissolution rates and processes, and Toulouse on lower-T surface reaction mechanisms. This project will combine their expertise in mineral reaction kinetics and allow the U.S. group to use high technology surface spectroscopic and analysis facilities not otherwise available to them.