Chapter 19 Hydraulic Pulses in the Earth's Crust

摘要: The analysis in this chapter attempts to quantify the coupling between pore space deformation and pressure earth's crust. Clearly, state of free water deep crust is inseparable from porosity, permeability, pressure. If porosity permeability are time-invariant, crustal at depth must be close hydrostatic. This conflict with evidence for ubiquitous high depth. Consequently content decrease time, as pores inelastically When low, its rate large, Pp trapped fluids rise time until spontaneous hydrofracturing, pulsed release water, loss some occurs, followed by a drop sealing system. After buildup period, another hydrofracturing episode occurs. Because inelastic enhanced shear stress, episodic process most probable tectonically active areas. Dimensional shows that tens hundreds episodes or 'burps,' each lasting 103-105 years, can occur before dewaters 106-107 years. Oceanic subduction may prolong 108 years more. High explain seismic reflectors detachments, large-scale horizontal fluid migration Episodic formation hydrothermal ore deposits mineralized veins, possibly aspects mechanics very large earthquakes.