Bleaching patterns along a faulted succession provides new insight into fluid migration pathways controlled by the fault zone and mechanical stratigraphy. In order to investigate this effect, we logged stratigraphic layers in Humbug Flats, Utah, USA both in host rocks and faulted rocks, where a 40 m offset normal fault cuts through the Entrada Sandstone. We measured petrophysical and mechanical properties using TinyPerm II, Schmidt Hammer and laboratory core testing for selected layers. Bleaching has been identified as a proxy for fluid migration parallel to bedding, which fades out with distance from faults. A new observation is that fracturing of bed interfaces contributes to horizontal flow out from the fault zone. Longer-distance comprehensive bleaching dominates the most permeable beds (units), hosting porosity-controlled deformation band associated to fault zones. Fractures prevail in low permeability and stiffer units, where isolated fracture parallel bleaching haloes are observed within fault damage and process zones. Strong correlation is observed between permeability/porosity and stiffness/strength properties for the tested samples of different layers along the stratigraphic logs. For the studied fault, fractures provide important conduits for vertical flow across low permeability and stiff layers, whereas the more porous layers provide bedding-parallel flow paths out of the fault zone.

沿断层序列的漂白模式为了解受断层带和机械地层控制的流体运移路径提供了新的见解。为了研究这种影响，我们在美国犹他州 Humbug Flats 的主岩和断层岩中记录了地层层，其中 40 m 偏移的正断层穿过 Entrada 砂岩。我们使用 TinyPerm II、Schmidt Hammer 和实验室岩心测试测量了选定层的岩石物理和机械性能。漂白已被确定为平行于层理的流体运移的代表，随着与断层的距离逐渐消失。一个新的观察结果是地层界面的破裂有助于从断层带水平流出。长距离综合漂白占主导地位的渗透性最强的床（单元），承载与断层带相关的孔隙度控制变形带。裂缝普遍存在于低渗透率和较硬的单元中，在断层损坏和过程区内观察到孤立的裂缝平行白化晕。对于沿地层测井的不同层的测试样品，在渗透率/孔隙度和刚度/强度特性之间观察到很强的相关性。对于所研究的断层，裂缝为穿过低渗透率和刚性层的垂直流动提供了重要的通道，而更多孔隙层提供了离开断层带的层理平行流动路径。对于沿地层测井的不同层的测试样品，在渗透率/孔隙度和刚度/强度特性之间观察到很强的相关性。对于所研究的断层，裂缝为穿过低渗透率和刚性层的垂直流动提供了重要的通道，而更多孔隙的层提供了离开断层带的层理平行流动路径。对于沿地层测井的不同层的测试样品，在渗透率/孔隙度和刚度/强度特性之间观察到很强的相关性。对于所研究的断层，裂缝为穿过低渗透率和刚性层的垂直流动提供了重要的通道，而更多孔隙的层提供了离开断层带的层理平行流动路径。