Folding by Large Scale Cataclastic Flow at Shallow Crustal Levels in the Internal Portions of the Sevier Orogenic Belt, West-Central Utah

0001030 mitraa增生楔的变形通常涉及逆冲断层和褶皱，当物质通过隆升和侵蚀逐渐向地表靠近时，它进入脆性场。然而，大规模褶皱的出现可能表明碎裂流对褶皱的拉紧作用，这一机制尚未得到详细研究。该项目将研究在塞维尔褶皱和冲断带内部的石英岩中发育的一级褶皱，并将收集有关裂缝、裂缝网络和应变的数据，以测试碎裂流模型。研究结果有助于理解大规模碎裂流的过程，并对其在造山带褶皱中的作用加以限制。

0001030MitraDeformation in accretionary wedges commonly involve thrust faults and folds, and as material is progressively brought closer to the surface by uplift and erosion, it enters the brittle field. Yet large-scale folds occur, which may indicate fold tightening by cataclastic flow, a mechanism that has not been studied in detail. This project will study a first-order fold developed in quartzite in the internal portion of the Sevier fold and thrust belt, and will gather data on fractures, fracture networks and strain in order to test models for cataclastic flow. Results should aid understanding the process of large-scale cataclastic flow and place constraints on its role in folds in an orogenic wedge.