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

科万9417759 脆性剪切带是许多构造环境中的共同特征，然而，尽管脆性剪切带的重要性以及其中沿着滑动的可能性是孕震的，但至今还没有统一的运动学模型将它们内部断层岩的中观组构与剪切带变形的应变路径或流动类型联系起来。 该项目将联合收割机现场数据与广泛的建模相结合，以帮助开发和测试一般同轴剪切是主要流动类型的假设，因为它是在韧性剪切带。 结果预计将提高能力，解释和运动学分析组构在脆性剪切带。

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.