Fluid-rock reaction weakening of fault zones
WebFeb 4, 2010 · The degree of weakening depends on the thickness of the weak layer. In nature, talc and most other weak minerals (clays and phyllosilicates) are formed by chemical and hydration reactions [ Imber et al., 1997; Jefferies et al., 2006; Schleicher et al., 2006; Collettini et al., 2009b ]. WebDec 1, 2004 · Fluid‐rock reaction weakening of fault zones R. Wintsch, R. Christoffersen, A. Kronenberg Geology 1995 The presence of weak phyllosilicates may explain the low shear strengths of fault zones if they define well-developed fabrics. The growth of phyllosilicates is favored in meteoric water-dominated… Expand 402 View 2 excerpts, …
Fluid-rock reaction weakening of fault zones
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WebMetamorphic core complexes and associated detachment faults of the North American Cordillera represent gently dipping, normal-displacement shear zones (detachment zones) along which hot, deeper levels of the crust were transported upward and outward from underneath a brittlely distended upper plate. Structures that formed during the ductile-to … WebThe low permeabilities measured support models invoking high fluid pressure weakening of large faults with minimal fluid loss. The stability of structured water films with varying temperature, water pressure and water chemistry may produce a heterogeneous permeability profile with depth in fault zones.
WebJan 30, 2003 · The experimental results show how hydrothermal reactions in fault zones may lead to two competing, time-dependent effects; fault strengthening due to increased … WebJul 10, 1995 · Fluid-rock Reaction Weakening of Fault Zones July 1995 DOI: Authors: Robert P. Wintsch Indiana University Bloomington R. Christoffersen AK Kronenberg …
WebAug 10, 2024 · Extensive fluid–rock reaction can produce layers of phyllosilicates, which can significantly weaken fault zones, as discussed below (e.g. Wintsch et al. 1995; Imber et al. 1997). A second difficulty in applying Byerlee's Law to the Earth relates to the composition of fault rocks. WebJan 10, 2024 · A modified slip-weakening constitutive law is applied at contacts. We perform velocity-stepping experiments on both uniform and layered mixtures of quartz and talc analogs. We separately vary the proportion of talc in the uniform mixtures and talc layer thickness in the layered mixtures.
WebJul 10, 1995 · Abstract. The presence of weak phyllosilicates may explain the low shear strengths of fault zones if they define well-developed fabrics. The growth of … hemophilia and gene therapyWebreaction weakening of fault zones In the absence of direct observations of high fluid pressure in active fault zones in crystalline rocks, the effects of fluids hemophilia and hispanicWebthrough a process of reaction weakening. Fluid-rock ... [1993] suggest that fluids penetrated the studied ancient fault zones throughout th• slip history and opisodic flow may hemophilia and hot tubsWebJan 30, 2003 · The experiments presented here show that isostatic hydrothermal reaction of fault products formed in previously intact rock can result in significant strengthening of … hemophilia and inbreedingWebSep 15, 2014 · The development of foliated cataclasis enriched in mica leads to strain weakening of fault zone through a decrease of the friction coefficient from 0.6 to 0.1 with strain (Collettini et al., 2009, ... Fluid–rock reaction weakening of fault zones. J. Geophys. Res., 100 (B7) (1995), pp. 13,021-13,032. Google Scholar. Cited by (0) View … hemophilia and healthy dietWebAug 1, 2014 · Fault rocks contain graphite veins and cement that locally constitute >50% of the rock. Individual graphite veins are as much as 1 cm wide, and are locally almost pure graphite, with minor muscovite and anatase. Hydrothermal graphite grain size (10–500 µm) is substantially greater than background metamorphosed organic matter (∼1 µm). hemophilia and periodsWebMay 13, 2015 · Chemical reactions between the fluid and rock mass lead to erosion in the mineral particles and crystals, weakening of the particle bond strength, and changes in the mineral components... hemophilia and inhibitors