Colleen A. Barton, Mark D. Zoback, Daniel Moos; Fluid flow along potentially active faults in crystalline rock. Geology ; 23 (8): 683–686. doi: https://doi.org/10.1130/0091-7613(1995)023<0683:FFAPAF>2.3.CO;2
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The relationship between in-situ stress and fluid flow in fractured and faulted rock is examined by using data from detailed analyses of stress orientation and magnitude, fracture geometry, and precision temperature logs that indicate localized fluid flow. Data obtained from three boreholes that penetrate highly fractured and faulted crystalline rocks indicate that potentially active faults appear to be the most important hydraulic conduits in situ. The data indicate that the permeability of critically stressed faults is much higher than that of faults that are not optimally oriented for failure in the current stress field.