How Do Faults Capture Fluid Flow During Initial Deformation of a "High Permeability" Accretionary Prism?

第三个项目将研究沿俄勒冈边缘的变形和流体排出的相互关系，并具体研究从地层控制到断层控制的过渡；现有的粒间渗透率测量为定量地层控制管道的流体流动提供了依据；对断层影响的评价需要直接测量断层岩石的渗透率，以及估计大于样本大小的裂缝网络的渗透率。他们将对峡谷岩壁进行取样，在岩壁上可以看到一个正在喷发流体的断层；它们将决定整个断裂带的渗透率、孔隙度、粒度、胶结状态和构造发育的变化。

Thid project will investigate the interrelationship of deformation and fluid expulsion along the Oregon margin and specifically examine the transition from stratigraphically controlled to fault controlled flow; existing measurements ofintergranular permeability provide a basis for quantifying fluid flow along stratigraphically-controlled conduits; evaluation of the effect of faults will require direct measurements of permeability in fault rocks as well as estimation of permeability along larger-than-sample size fracture networks. They will sample a canyon wall what exposes a fault that is venting fluids; they will determine the variation of permeability, porosity, grain size, cementation state, and structural fabric development across the fault zone.