Fluid Flow in a Deforming Thrust Terrane

9725711 Wiltschko有一个普遍的共识，即高流体压力是大陆褶皱冲断带中吸积棱柱演化和单个冲断片运动的重要控制机制。然而，由于古大陆冲断带中缺乏直接证据，古冲断带中存在如此高的流体压力仍然是个问题，本项目将开发一个更完整的层状楔体的流体力学模型，该模型结合了强度和水力非均质性。有关岩石实际力学性质的数据，如屈服强度、应变硬化/软化行为和水文渗透性，将包括在有限元分析中。结果应该提供一个关键的楔形模型，其中包括这些重要的水文和力学参数，以便能够正确地评估高流体压力在岩石变形中的作用。

9725711 Wiltschko There is a general consensus that high fluid pressure is an important controlling mechanism for the evolution of accretionary prisms and the motion of individual thrust sheets in a continental fold and thrust belt. However, the existence of such high fluid pressure in ancient thrust belts remains problematical for lack of direct evidence in ancient continental thrust belts, this project will develop a more complete hydromechnical model of a layered wedge that incorporates strength and hydraulic heterogeneity. Data on actual mechanical properties of rocks such as yield strength, strain hardening/softening behavior and hydrologic permeability will be included in a finite element analysis. Results should provide a critical wedge model that includes these important hydrologic and mechanical parameters so that the role of high fluid pressure during rock deformation can be properly assessed.