COLLABORATIVE RESEARCH: Folding Processes in Thrust Belts: Lost River Range Idaho

对冲断带的几何研究已经产生了一些用于发展特定构造几何的运动学模型，但由于缺乏足够的增量应变数据和诊断微结构，这些模型在很大程度上仍未经过大规模实例的检验。该项目旨在从爱达荷州Lost River山脉北部暴露良好的褶皱和逆冲构造中提供足够的数据集，以便约束这些结构的开发模型。这项工作包括构建详细的三维结构几何和横截面，并使用从这些结构的适当部分收集的样品来确定同构造纤维的应变历史。预计结果将允许对有关这种褶皱和冲断如何发展的几个假说进行有力的测试。这一结果将有助于理解其他褶皱和冲断带的变形运动学。

Geometric studies in thrust belts have given rise to a number of kinematic models for the development of specific structural geometries, but the models have remained to a large extent untested for large scale examples because of a lack of sufficient incremental strain data and diagnostic microstructures. This project is designed to provide an adequate data set from well- exposed folds and thrusts in the northern Lost River Range in Idaho in order to constrain models for the development of those structures. The work involves construction of detailed 3-D structural geometries and cross-sections and the determination of strain histories using syntectonic fibers from samples collected from appropriate parts of these structures. Results are expected to allow a vigorous test of several hypotheses concerning how such folds and thrusts develop. The outcome will be utility in understanding the kinematics of deformation in other fold and thrust belts.