A Field and Theoretical Study of Fabric and Flow in Brittle Shear Zones

9417759考恩脆性剪切带是许多构造环境中的共同特征，然而，尽管脆性剪切带很重要，并且沿其中一些剪切带滑动的可能性是诱发地震的，但迄今为止还没有统一的运动学模型，将断层岩石的细观结构与剪切带变形的应变路径或流动类型联系起来。该项目将现场数据与广泛的建模相结合，以帮助开发和测试假设，即在韧性剪切带中，一般同轴剪切是主要的流动类型。研究结果有望提高脆性剪切带织物的解释和运动学分析能力。

9417759 Cowan Brittle shear zones are common features in many tectonic settings, yet in spite of the importance of brittle shear zones and the probability that slip along some of them was seismogenic, there is as yet no unifying kinematic model relating the mesoscopic fabrics of the fault rocks within them to the strain paths or flow types characterizing shear zone deformation. This project will combine field data with extensive modeling to help develop and test the hypothesis that general coaxial shear is the predominant flow type as it is in ductile shear zones. Results are expected to improve the ability to interpret and kinematically analyze fabrics in brittle shear zones.