Temperature estimates of coseismic heating in clay-rich fault gouges, the Chelungpu fault zones, Taiwan

Kuo, Li Wei; Song, Sheng-Rong; Huang, Li-Chun; Yeh, En Chao; Chen, Huei Fen

doi:10.1016/j.tecto.2011.02.001

Cited by 51 publications

(42 citation statements)

References 60 publications

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“…vesicles, spherulites) have also been described in samples from Hole B of TCDP (Hirono et al, 2006;Otsuki et al, 2009). For Hole A, Kuo et al (2009Kuo et al ( , 2011 described pseudotachylites with vesicles of about 1e40 mm diameter within the PSZ (1111-m Zone).…”

Section: Amorphous Material/meltingmentioning

confidence: 99%

“…The occurrence of glass textures in TCDP samples from Holes A and B clearly shows that frictional melting occurred. Kuo et al (2011) estimated a temperature range from 900 C to 1100 C of coseismic heating in clay-rich fault gouges of the Chelungpu-fault zone. Kuo et al (2009) suggested that pseudotachylites developed during the 1999 ChieChi earthquake, were quickly altered to smectite.…”

Section: Amorphous Material/meltingmentioning

confidence: 99%

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Faulting processes in active faults – Evidences from TCDP and SAFOD drill core samples

Janssen

Wirth

Wenk

et al. 2014

Journal of Structural Geology

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a b s t r a c tThe microstructures, mineralogy and chemistry of representative samples collected from the cores of the San Andreas Fault drill hole (SAFOD) and the Taiwan Chelungpu-Fault Drilling project (TCDP) have been studied using optical microscopy, TEM, SEM, XRD and XRF analyses. SAFOD samples provide a transect across undeformed host rock, the fault damage zone and currently active deforming zones of the San Andreas Fault. TCDP samples are retrieved from the principal slip zone (PSZ) and from the surrounding damage zone of the Chelungpu Fault. Substantial differences exist in the clay mineralogy of SAFOD and TCDP fault gouge samples. Amorphous material has been observed in SAFOD as well as TCDP samples. In line with previous publications, we propose that melt, observed in TCDP black gouge samples, was produced by seismic slip (melt origin) whereas amorphous material in SAFOD samples was formed by comminution of grains (crush origin) rather than by melting. Dauphiné twins in quartz grains of SAFOD and TCDP samples may indicate high seismic stress. The differences in the crystallographic preferred orientation of calcite between SAFOD and TCDP samples are significant. Microstructures resulting from dissolutioneprecipitation processes were observed in both faults but are more frequently found in SAFOD samples than in TCDP fault rocks. As already described for many other fault zones clay-gouge fabrics are quite weak in SAFOD and TCDP samples. Clay-clast aggregates (CCAs), proposed to indicate frictional heating and thermal pressurization, occur in material taken from the PSZ of the Chelungpu Fault, as well as within and outside of the SAFOD deforming zones, indicating that these microstructures were formed over a wide range of slip rates.

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Section: Amorphous Material/meltingmentioning

confidence: 99%

Section: Amorphous Material/meltingmentioning

confidence: 99%

Faulting processes in active faults – Evidences from TCDP and SAFOD drill core samples

Janssen

Wirth

Wenk

et al. 2014

Journal of Structural Geology

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show abstract

“…According to previous research, the PSZ is located at the fault core (fault gouge) (Sibson 2003;Ma et al 2006;Song et al 2007;Kuo et al 2009Kuo et al , 2011Li et al 2013Wang et al 2014). There are 22 fault zones in the WFSD-3 cores, and each has multilayers of fault gouge.…”

Section: The Principal Slip Zone (Psz) Of the Wenchuan Earthquake In mentioning

confidence: 99%

“…High magnetic susceptibility in the fault gouge may be due to the increase in magnetic mineral content caused by high-temperature frictional heating (Kano et al 2006;Hirono et al 2008;Pei et al 2010;Liu et al 2014). Only 1-mm to <2-cm-thick fault gouge is usually produced in a single earthquake, as seen in the Chi-Chi earthquake (Ma et al 2006;Kuo et al 2011Kuo et al , 2014, and the Wenchuan earthquake in the WFSD-1 cores in the Yingxiu-Beichuan fault (Li et al 2013;Si et al 2014); therefore, the entire ~2-3-cm-thick fault gouge found here may have not been generated by the Wenchuan earthquake. In summary, the geological and fault structure characteristics, observed both by the surface outcrop and the WFSD-3 cores, as well as the logging data, indicate that the PSZ of the Wenchuan earthquake is likely located in the black fault gouge at 1249.95 m depth in FZ1250.…”

Section: The Principal Slip Zone (Psz) Of the Wenchuan Earthquake In mentioning

confidence: 99%

Lithological and structural characterization of the Longmen Shan fault belt from the 3rd hole of the Wenchuan Earthquake Fault Scientific Drilling project (WFSD-3)

Wang

Yang

et al. 2015

Int J Earth Sci (Geol Rundsch)

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present in the hanging wall. The actual total thickness of the Guanxian-Anxian fault zone is ~210 m. Based on the analyses of comprehensive logging data, characteristics of the fault gouge, and seismic fault structures, the principal slip zone for the Wenchuan earthquake is identified in the black fault gouge at 1249.95 m depth in the cores, which lies almost at the bottom of the Guanxian-Anxian fault zone, and is also confirmed by surface rupture zone observations. The slip plane of the Wenchuan earthquake is a low-angle thrust fault with a dip angle of ~38° as estimated from the results of the WFSD-3 core analyses. The results from WFSD-1 showed that the Yingxiu-Beichuan segment is a high-angle thrust fault striking NW with a dip angle of ~65°. These two fault segments have different thicknesses and fault structures, which may suggest different faulting mechanisms and evolution history.

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“…Han et al 2007), clay mineral reactions (e.g. Kuo et al 2011), vitrinite reflectance (e.g. Sakaguchi et al 2011), and biomarker thermal maturity (e.g.…”

Section: Introductionmentioning

confidence: 99%

Seismic heating signatures in the Japan Trench subduction plate-boundary fault zone: evidence from a preliminary rock magnetic ‘geothermometer’

Yang

Dekkers

Zhang³

2016

Geophys. J. Int.

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Temperature estimates of coseismic heating in clay-rich fault gouges, the Chelungpu fault zones, Taiwan

Cited by 51 publications

References 60 publications

Faulting processes in active faults – Evidences from TCDP and SAFOD drill core samples

Faulting processes in active faults – Evidences from TCDP and SAFOD drill core samples

Lithological and structural characterization of the Longmen Shan fault belt from the 3rd hole of the Wenchuan Earthquake Fault Scientific Drilling project (WFSD-3)

Seismic heating signatures in the Japan Trench subduction plate-boundary fault zone: evidence from a preliminary rock magnetic ‘geothermometer’

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