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

该奖项支持耶鲁大学的Mark Brandon教授和一名研究生与三位德国地质学家Passchier、Den Brok和Ring教授以及他们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效果来研究压力解决过程的运动学。这些自然变形的岩石将包括来自堪察加半岛北部的砂岩，以及来自美因茨附近瑞士和法国阿尔卑斯山地区的砂岩和粉砂岩。在这些地区的实地工作将由博士。布兰登，林和他们的学生。布兰登博士将指导天然织物的测量，这将在耶鲁大学的专用设备上进行。实验工作将主要由dr。Paschier和Den Brok在德国美因茨设备齐全的实验室里。他们将在选定的晶粒尺寸、温度和差应力条件下，对“湿”岩盐的细粒致密集合体进行操作，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中参与部分实验室研究。在以俯冲带为特征的低温/高压环境中，压力溶解似乎是主要的韧性机制。该项目的具体目标是提高对致密岩石中典型压力-解变形结构的运动学发展的理解。这些信息将提高这些构造数据在理解区域构造问题方面的效用。

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.