U.S.-Germany Cooperative Research on the Kinematic Development of Pressure Solution Fabrics in Dense Rocks

该奖项支持马克布兰登教授和耶鲁大学的一名研究生与三位德国地质学家帕斯谢尔、登布鲁克和林教授及其在美因茨大学的学生合作。 他们将通过比较其在自然和实验变形材料中的影响来研究压力溶解过程的运动学。 自然变形的岩石将包括来自堪察加半岛北方的砂岩和来自美因茨附近的瑞士和法国阿尔卑斯山地区的砂岩和粉砂岩。 这些领域的实地工作将由布兰登博士和林博士及其学生完成。 布兰登博士将指导自然织物的测量，这将是在他的专业设备在耶鲁大学进行。实验工作将主要由Paschier博士和Den Brok博士在他们位于德国美因茨的设备齐全的实验室中进行。 他们将利用选定的粒度、温度和差应力来处理“湿”岩盐的非常细粒度的致密聚集体，以提供有效的比较。 所有参与的科学家和一些学生将在两个机构之间的一系列交流访问期间在实验室研究的部分进行互动。 压力溶液似乎是主要的韧性机制，在低温/高压设置的特征俯冲带。 该项目的具体目标是提高对致密岩石中代表压力溶解变形的组构的运动学发展的理解。 这些信息将提高这种组构数据的效用，努力了解区域构造问题。

This award supports Professor Mark Brandon and a graduate student of Yale University to collaborate with three German geologists, Professors Passchier, Den Brok and Ring, and their students at the University of Mainz. They will study the kinematics of the pressure-solution process by comparing its effects in natural and experimentally deformed materials. The naturally deformed rocks will include sandstones from northern Kamchatka and sandstone and siltstones from regions of the Swiss and French Alps near Mainz. Field work in these areas will be done by Drs. Brandon and Ring and their students. Dr. Brandon will direct the natural fabric measurements, which will be carried out on his specialized equipment at Yale. The experimental work will be carried out primarily by Drs. Paschier and Den Brok in their well-equipped laboratories in Mainz, Germany. They will manipulate very fine grained dense aggregates of `wet` halites, with selected grain size, temperature and differential stress, to provide valid comparisons. All the participating scientists and some students will interact in portions of the laboratory research during a series of exchange visits between the two institutions. Pressure solution appears to be the dominant ductile mechanism operating in the low temperature/high pressure setting that characterizes subduction zones. The specific objective of the project is to improve understanding of the kinematic development of fabrics that typify pressure-solution deformation in dense rocks. This information will improve the utility of such fabric data in efforts to understand regional tectonic problems.