Experimental frictional heating of coal gouge at seismic slip rates: Evidence for devolatilization and thermal pressurization of gouge fluids

2006 ◽  
Vol 424 (1-2) ◽  
pp. 109-118 ◽  
Author(s):  
Kieran O'Hara ◽  
Kazuo Mizoguchi ◽  
Toshihiko Shimamoto ◽  
James C. Hower
Keyword(s):  
Frictional Heating ◽  
Slip Rates ◽  
Seismic Slip ◽  
Thermal Pressurization

Resetting of OSL/TL/ESR signals by frictional heating in experimentally sheared quartz gouge at seismic slip rates

2019 ◽  
Vol 49 ◽  
pp. 52-56 ◽  
Author(s):  
Hui Li Yang ◽  
Jie Chen ◽  
Lu Yao ◽  
Chun Ru Liu ◽  
Toshihiko Shimamoto ◽  
...  
Keyword(s):  
Frictional Heating ◽  
Slip Rates ◽  
Seismic Slip

scholarly journals Is frictional heating needed to cause dramatic weakening of nanoparticle gouge during seismic slip? Insights from friction experiments with variable thermal evolutions

2016 ◽  
Vol 43 (13) ◽  
pp. 6852-6860 ◽  
Author(s):  
Lu Yao ◽  
Shengli Ma ◽  
André R. Niemeijer ◽  
Toshihiko Shimamoto ◽  
John D. Platt
Keyword(s):  
Frictional Heating ◽  
Seismic Slip

scholarly journals Frictional evolution, acoustic emissions activity, and off-fault damage in simulated faults sheared at seismic slip rates

2016 ◽  
Vol 121 (10) ◽  
pp. 7490-7513 ◽  
Author(s):  
François. X. Passelègue ◽  
Elena Spagnuolo ◽  
Marie Violay ◽  
Stefan Nielsen ◽  
Giulio Di Toro ◽  
...  
Keyword(s):  
Acoustic Emissions ◽  
Slip Rates ◽  
Seismic Slip

scholarly journals Flash weakening of serpentinite at near-seismic slip rates

2011 ◽  
Vol 116 (B3) ◽  
Author(s):  
Arjun H. Kohli ◽  
David L. Goldsby ◽  
Greg Hirth ◽  
Terry Tullis
Keyword(s):  
Slip Rates ◽  
Seismic Slip

scholarly journals Hematite (U-Th)/He thermochronometry detects asperity flash heating during laboratory earthquakes

Geology ◽  
2020 ◽  
Vol 48 (5) ◽  
pp. 514-518 ◽  
Author(s):  
Gabriele Calzolari ◽  
Alexis K. Ault ◽  
Greg Hirth ◽  
Robert G. McDermott
Keyword(s):  
High Temperatures ◽  
Temperature Rise ◽  
Thick Layer ◽  
Seismogenic Zone ◽  
Experimental Conditions ◽  
Slip Rates ◽  
Seismic Slip ◽  
Slip Surfaces ◽  
Before And After ◽  
Dynamic Weakening

Abstract Evidence for coseismic temperature rise that induces dynamic weakening is challenging to directly observe and quantify in natural and experimental fault rocks. Hematite (U-Th)/He (hematite He) thermochronometry may serve as a fault-slip thermometer, sensitive to transient high temperatures associated with earthquakes. We test this hypothesis with hematite deformation experiments at seismic slip rates, using a rotary-shear geometry with an annular ring of silicon carbide (SiC) sliding against a specular hematite slab. Hematite is characterized before and after sliding via textural and hematite He analyses to quantify He loss over variable experimental conditions. Experiments yield slip surfaces localized in an ∼5–30-µm-thick layer of hematite gouge with <300-µm-diameter fault mirror (FM) zones made of sintered nanoparticles. Hematite He analyses of undeformed starting material are compared with those of FM and gouge run products from high-slip-velocity experiments, showing >71% ± 1% (1σ) and 18% ± 3% He loss, respectively. Documented He loss requires short-duration, high temperatures during slip. The spatial heterogeneity and enhanced He loss from FM zones are consistent with asperity flash heating (AFH). Asperities >200–300 µm in diameter, producing temperatures >900 °C for ∼1 ms, can explain observed He loss. Results provide new empirical evidence describing AFH and the role of coseismic temperature rise in FM formation. Hematite He thermochronometry can detect AFH and thus seismicity on natural FMs and other thin slip surfaces in the upper seismogenic zone of Earth’s crust.

Moisture-related weakening and strengthening of a fault activated at seismic slip rates

2006 ◽  
Vol 33 (16) ◽  
Author(s):  
Kazuo Mizoguchi ◽  
Takehiro Hirose ◽  
Toshihiko Shimamoto ◽  
Eiichi Fukuyama
Keyword(s):  
Slip Rates ◽  
Seismic Slip

Nanocrystalline slip zones in calcite fault gouge show intense crystallographic preferred orientation: Crystal plasticity at sub-seismic slip rates at 18–150 °C

Geology ◽  
2013 ◽  
Vol 41 (8) ◽  
pp. 863-866 ◽  
Author(s):  
Berend A. Verberne ◽  
Johannes H.P. de Bresser ◽  
André R. Niemeijer ◽  
Christopher J. Spiers ◽  
D.A. Matthijs de Winter ◽  
...  
Keyword(s):  
Crystal Plasticity ◽  
Fault Gouge ◽  
Preferred Orientation ◽  
Slip Rates ◽  
Crystallographic Preferred Orientation ◽  
Seismic Slip
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