Mechanics of Shale Deformation in Thrust Fault Zones

逆冲岩片运动的力学模型采用了多种 关于断层带强度和流变性的假设。 然而，在这方面， 几乎没有观察结果可以限制 断裂带流变学 这项研究旨在确定 逆冲断裂带泥质岩变形特征及机理 以及更好地了解逆冲岩席如何移动的方法。 组合 现场，实验和理论方法将被应用于 蒙大拿州西北部刘易斯逆冲断层的两次暴露 以及邻近的阿尔伯塔省。 自然与实验的相关性 变形页岩组构与理论相结合， 解释页岩中典型的非线性流变学和相关的 逆冲断层基底变形的强度和不均匀性 薄膜.

Mechanical models of thrust sheet motion employ a variety of assumptions about fault zone strength and rheology. However, there are few observations available to constrain the choices of fault zone rheology. This research is designed to determine the character and mechanics of shale deformation in thrust fault zones and a way to better understand how thrust sheets move. A combined field, experimental and theoretical approach will be applied to two exposures of the Lewis thrust fault in northwestern Montana and adjacent Alberta. Correlation of naturally and experimentally deformed shale fabrics in combination with theory will be used to explain the typical nonlinear rheology in shale and associated intensity and heterogeneity of deformation at the bases of thrust sheets.