Frictional behavior of simulated biotite fault gouge under hydrothermal conditions

2014 ◽  
Vol 622 ◽  
pp. 62-80 ◽  
Author(s):  
Zhen Lu ◽  
Changrong He
Keyword(s):  
Fault Gouge ◽  
Hydrothermal Conditions ◽  
Frictional Behavior

scholarly journals Clay minerals from the Arkitsa fault gouge zone, in Central Greece, and implications for fluid flow

2017 ◽  
Vol 47 (2) ◽  
pp. 616 ◽  
Author(s):  
D. Papoulis ◽  
D. Romiou ◽  
S. Kokkalas ◽  
P. Lampropoulou
Keyword(s):  
Fluid Flow ◽  
Clay Minerals ◽  
Fault Zone ◽  
Damage Zone ◽  
Fault Gouge ◽  
Hydrothermal Conditions ◽  
Core Zone ◽  
Damage Area ◽  
Central Greece ◽  
Alkaline Conditions

Clay minerals in shallow fault rocks are increasingly recognized as key to the mechanical and seismogenic behavior of faults and fluid flow circulation within the fault core and the surrounding damage zone. We therefore studied faultgouge mineralogy from samples derived from the ENE-trending Arkitsa fault zone, in east-central Greece, in order to testify if the fault is acting as a channel for fluid flow and whether the conditions that characterize the flow can be identified. Clay-gouge samples were collected within the fault core zone, as well as in the broader fault damage area. Consequently, the samples were analyzed by X-Ray Diffraction, SEM and Electron microprobe analyses. The minerals that were identified within the centre of the fault zone are: Montmorillonite, corrensite, illite, micro-calcite, dolomite, quartz, plagioclase and K-feldspars. The absence of corrensite, a clay mineral usually formed in hydrothermal conditions, in the samples from the broader fault damage area indicates that the circulation of hydrothermal fluids is mostly confined within and around the fault core zone. The assemblages within the fault gouge zone and especially the presence of corrensite, combined with the absence of laumontite, indicate hydrothermal alteration at neutral to alkaline conditions and a temperature range at about 100-150 oC.

High-velocity frictional behavior and microstructure evolution of fault gouge obtained from Nojima fault, southwest Japan

2009 ◽  
Vol 471 (3-4) ◽  
pp. 285-296 ◽  
Author(s):  
Kazuo Mizoguchi ◽  
Takehiro Hirose ◽  
Toshihiko Shimamoto ◽  
Eiichi Fukuyama
Keyword(s):  
Microstructure Evolution ◽  
High Velocity ◽  
Fault Gouge ◽  
Southwest Japan ◽  
Frictional Behavior ◽  
Nojima Fault

Frictional behavior and constitutive modeling of simulated fault gouge

1990 ◽  
Vol 95 (B5) ◽  
pp. 7007 ◽  
Author(s):  
Chris Marone ◽  
C. Barry Raleigh ◽  
C. H. Scholz
Keyword(s):  
Constitutive Modeling ◽  
Fault Gouge ◽  
Frictional Behavior

scholarly journals Healing and sealing of a simulated fault gouge under hydrothermal conditions: Implications for fault healing

1998 ◽  
Vol 103 (B4) ◽  
pp. 7421-7430 ◽  
Author(s):  
Martin P. Olsen ◽  
Christopher H. Scholz ◽  
Albert Léger
Keyword(s):  
Fault Gouge ◽  
Hydrothermal Conditions ◽  
Fault Healing

Temperature and fluid activation of contact healing and fault lubrication in rate-and-state friction

2020 ◽  
Author(s):  
Sylvain Barbot
Keyword(s):  
Slip Velocity ◽  
Large Body ◽  
Fluid Phase ◽  
Constitutive Law ◽  
Granitic Rocks ◽  
Hydrothermal Conditions ◽  
Frictional Behavior ◽  
Shear Heating ◽  
Host Rocks ◽  
Healing Processes

<p>The frictional behavior of rocks under shear offers tremendous complexity depending among others on rock type, temperature, fluid content, and sliding velocity. A large body of laboratory experiments documents these effects, but a unifying theoretical framework linking these observations is still missing. Here, I present a constitutive law based on multiple temperature and fluid activated healing processes and a fluid lubrication phase to capture fault behavior in the brittle field in all conditions relevant to the seismic cycle. Distinct healing processes are activated at different temperatures, pore fluid pressures, and depths based on their respective activation enthalpy. A fluid phase is rapidly formed at the high temperatures facilitated by shear heating, allowing strong weakening at high slip velocity. The model explains the intricate change of frictional behavior of carbonate rocks at various temperatures, including simultaneous velocity-strengthening and temperature-weakening at temperatures lower than 70ºC, transitioning to simultaneous velocity-weakening and temperature-hardening at higher temperatures. With different parameters, the model explains the frictional properties of quartz and granitic rocks in hydrothermal conditions with velocity-strengthening behavior in nominally dry conditions, transitioning to velocity-weakening between 100ºC and 350ºC in wet conditions. Inclusion of a lubrication phase formed between the solidus and the liquidus of the host rocks explains the strong weakening at high slip velocity in a variety of rocks. The unified constitutive framework allows modeling of faults in varying temperature and pore pressure conditions, including for example injection of pore fluids in natural faults or shear heating of the host rocks. </p>

scholarly journals Depth dependence of the frictional behavior of montmorillonite fault gouge: Implications for seismicity along a décollement zone

2017 ◽  
Vol 44 (11) ◽  
pp. 5383-5390 ◽  
Author(s):  
Tomoyo Mizutani ◽  
Ken-ichi Hirauchi ◽  
Weiren Lin ◽  
Michiyo Sawai
Keyword(s):  
Fault Gouge ◽  
Frictional Behavior ◽  
Depth Dependence
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