Kinematic History of the Pasayten and Entiat Fault Zones, Northwestern Washington

在晚白垩世至早第三纪期间，与北美西北部地体增生相关的跨流断裂变形的作用是有争议的，存在几种不同的假设来解释从华盛顿北到加拿大的造山带的演化。该项目将收集有关位移历史（随时间变化的剪切感）、变形期间的压力-温度条件以及华盛顿西北部两条主要盆地边界断层（Pasayten和Entiat断层）的运动年龄的数据。研究结果将有助于阐明北美晚中生代主要造山带之一的收缩构造和横向构造的相对重要性，以及关于趋同边缘附近横向断裂作用的更基本问题。

The role of transcurrent faulting during Late Cretaceous to early tertiary deformation associate with terrane accretion to northwest North America is controversial, and several different hypotheses exist to explain the evolution of the orogen from Washington north into Canada. This project will collect data on displacement history (sense of shear through time), the Pressure-Temperature conditions during deformation and the age of movements along two major basin-bounding faults, the Pasayten and Entiat faults in northwestern Washington. Results will help elucidate the relative importance of contractional and transcurrent structures in one of the major Late Mesozoic orogenic belts of North America, and more fundamental questions regarding the role of transcurrent faults near convergent margins.