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Passchier教授、Den Brok教授和Ring教授以及他们在美因茨大学的学生合作。他们将通过比较压力溶解过程在自然材料和实验变形材料中的效果，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。这些地区的实地考察将由Brandon博士、Ring博士和他们的学生完成。布兰登博士将指导自然面料的测量，这将在耶鲁大学的专门设备上进行。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进行。他们将操纵非常细粒的“湿”盐岩的致密集合体，并选择粒度、温度和差异应力，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内容中进行互动。压力溶液似乎是在以俯冲带为特征的低温/高压环境下工作的主要韧性机制。该项目的具体目标是提高对致密岩石中典型的压力-溶液变形组构的运动学发展的了解。这些信息将提高此类组构数据在努力了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.