Fault zone fabric and fault weakness

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August undefined, 2024

WebAug 1, 2024 · In particular, exhumed fault and shear zones from various depths reveal the importance of multiple deformation processes and fault-zone structures. Most geologic examples feature frictionally weak and velocity-strengthening materials, well-developed mineral fabrics, and abundant veining indicative of near-lithostatic fluid pressure. WebOct 30, 2014 · The relative weakness of major brittle fault zones has commonly been attributed to one or more of (a) high pore fluid pressure (P f), (b) dynamic weakening by processes such as flash melting at asperities or thermal pressurization, and (c) low coefficients of friction on the fault surface or within clay or phyllosilicate-rich fault gouge. …

Fabric induced weakness of tectonic faults - AGU Journals

WebGeological and geophysical evidence suggests that some crustal faults are weak1–6 compared to laboratory measurements of frictional strength7. Explanations for fault weakness include the presence of weak minerals4, high fluid pressures within the fault core8,9 and dynamic processes such as normal stress reduction10, acoustic … WebJul 7, 2011 · The dependency of the rigidity of the fault zone on the fault’s length is obtained. The rigidity of the tectonic structures is found to experience well-expressed temporal variations with periods of 13–15 days, 27–32 days, and about one year. In the different-order fault zones, the amplitudes of both normal k n and the shear k s rigidity ... boina oitavada

Fault zone fabric and fault weakness — Penn State

WebMy Research and Language Selection Sign into My Research Create My Research Account English; Help and support. Support Center Find answers to questions about products, … WebThey find that samples with well-developed foliation or banding are extremely weak compared to their powdered equivalents, and that fault weakness can occur in cases … WebJan 17, 2024 · Geological heterogeneity is abundant in crustal fault zones; however, its role in controlling the mechanical behaviour of faults is poorly constrained. ... D. Fabric induced weakness of tectonic ... boina militar russo

Deformation Process and Mechanism of the Frontal Megathrust at …

Fault zone fabric and fault weakness - ProQuest

WebFault zone fabric and fault weakness. Nature. 2009; 462(7275):907-10 (ISSN: 1476-4687) ... Explanations for fault weakness include the presence of weak minerals, high fluid pressures within the fault core and dynamic processes such as normal stress reduction, acoustic fluidization or extreme weakening at high slip velocity. ... WebJan 1, 2010 · Fault zone fabric and f ault weakness. Na ture, 462(7275), 907-910, DOI: 10.1038/nature0 8585. ... Explanations for fault weakness include the presence of weak minerals, high fluid pressures ... boin loinsWebFabric induced weakness of tectonic faults André Niemeijer,1,2,3,4 Chris Marone,2,3 and Derek Elsworth1,3 Received 10 November 2009; revised 30 December 2009; accepted 8 January 2010; published 4 February 2010. [1] Mature fault zones appear to be weaker than predicted by both theory and experiment. One explanation involves the presence of weak ... boina onu

"WebThey find that samples with well-developed foliation or banding are extremely weak compared to their powdered equivalents, and that fault weakness can occur in cases … " - Fault zone fabric and fault weakness

Fault zone fabric and fault weakness

WebExplanations for fault weakness include the presence of weak minerals, high fluid pressures within the fault core and dynamic processes such as normal stress … WebJul 7, 2011 · The dependency of the rigidity of the fault zone on the fault’s length is obtained. The rigidity of the tectonic structures is found to experience well-expressed …

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WebFeb 1, 2010 · Fault zone fabric and fault weakness. C. Collettini, A. Niemeijer, C. Viti, C. Marone. Geology. Nature. 2009. Geological and geophysical evidence suggests that some crustal faults are weak compared to laboratory measurements of frictional strength. Explanations for fault weakness include the presence of weak…. Expand. Webfault zone: [noun] an area in which there are several closely spaced faults.

WebFeb 4, 2010 · [1] Mature fault zones appear to be weaker than predicted by both theory and experiment. One explanation involves the presence of weak minerals, such as talc. … WebApr 6, 2024 · The study area of this paper is the southwest Huizhou Sag, which is located in the Northern Depression Zone in the Pearl River Mouth Basin and is characterized by several subsags and normal faults of ENE-WSW, WNW-ESE and E-W strike (Fig. 1).Due to the poor quality of early seismic data, previous studies of the southwest Huizhou Sag …

WebFeb 27, 2011 · The fault zone contains the weak mineral smectite and exhibits no frictional healing—bonds in the material do not heal after rupture. WebFeb 1, 2010 · Mature fault zones appear to be weaker than predicted by both theory and experiment. One explanation involves the presence of weak minerals, such as talc. However, talc is only a minor constituent of most fault zones and thus the question arises: what proportion of a weak mineral is needed to satisfy weak fault models? Existing …

WebJul 21, 2014 · Explanation for fault weakness • Dynamic weakening mechanisms • Presence of weak minerals but usually not in sufficient abundance • High fluid pressure within the fault core but required …

WebDec 1, 2009 · Explanations for fault weakness include the presence of weak minerals, high fluid pressures within the fault core and dynamic processes such as normal stress … boina moitaWeb[1] Mature fault zones appear to be weaker than predicted by both theory and experiment. One explanation involves the presence of weak minerals, such as talc. However, talc is … boinaitsWebDec 17, 2009 · We show that fault weakening depends strongly on rock fabric and the distribution of weak phases within a fault zone. The result is akin to findings from studies involving dissolution 6 and... We would like to show you a description here but the site won’t allow us. boina telinhaWebFault zone fabric and fault weakness. Cristiano Collettini (), André Niemeijer, Cecilia Viti and Chris Marone Additional contact information Cristiano Collettini: Geologia Strutturale e Geofisica, 06100, Perugia, Italy ... Abstract: Paradoxical fault weakness For reasons that are still obscure, some crustal faults — California's San Andreas ... boina viseraWebJun 15, 2014 · Fault zone fabric and fault weakness. Nature (2009) J.H. Dieterich Time-dependent friction and the mechanics of stick-slip. Pure Appl. Geophys. (1978) J.H. Dieterich ... In this situation, the fault zone creeps because of distributed deformation of fractured rocks, and the creep may take place as transient events of various spatial and … boina tolosaWebDec 1, 2016 · Collettini C, Niemeijer A, Viti C, Marone C (2009) Fault zone fabric and fault . weakness. Nature 462:907–910. doi: 10.1038/nature08585. Di T oro G, Han R, Hirose T, ... boineelo moyoWebOur data show that fault weakness can occur in cases where weak mineral phases constitute only a small percentage of the total fault rock and that low friction results from … boineelo masuku