Earthquake Triggering along the Xianshuihe Fault Zone of Western Sichuan, China

Papadimitriou, Eleftheria; Xu, Wen; Karakostas, V.; Jin, Xin

doi:10.1007/s00024-003-2471-4

Cited by 105 publications

(64 citation statements)

References 25 publications

(21 reference statements)

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“…The geological and statistical methods are used, but the interactions between major earthquakes occurring along the fault zone are ignored in their work. Some researchers [9,10] studied the triggering mechanism between major earthquakes along the Xianhuihe fault zone by using the homogeneous elastic dislocation model [11] . However, if the media is assumed to be half-spatially homogeneous in the dislocation model, the difference is big between the results derived from homogeneous dislocation model and elastic layered model [12] .…”

Section: Introductionmentioning

confidence: 99%

Dynamic simulation of interactions between major earthquakes on the Xianshuihe fault zone

Wang

Liu

Zhang

et al. 2008

Sci. China Ser. D-Earth Sci.

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The authors firstly evaluate the strain accumulation rate of the Xianshuihe fault zone based on earthquake activity. We calculated the stress and seismic moment accumulation rate for each subsection of the Xianshuihe fault zone based on the distribution of geological slip rate and GPS survey results. According to the results, we get the recurrence intervals of characterized earthquakes on each subsection respectively. A three-dimensional finite element model for western Sichuan is constructed to discuss the earthquakes triggering among major earthquakes (M>6.7) that occurred along the Xianshuihe fault zone since 1893. The calculated Coulomb failure stress changes (ΔCFS) show that 5 of the 6 earthquakes with Ms>6.7 were triggered by positive ΔCFS. The interactions between major earthquakes not only influence recurrence intervals of characterized earthquakes on each subsection, but also change recurrence behavior of major earthquakes along the whole fault zone.Xianshuihe fault zone, strain accumulation and releasing, recurrence interval, finite element method, Coulomb failure stress changes

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Section: Introductionmentioning

confidence: 99%

Dynamic simulation of interactions between major earthquakes on the Xianshuihe fault zone

Wang

Liu

Zhang

et al. 2008

Sci. China Ser. D-Earth Sci.

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“…Changes in the occurrence rate of local and regional seismicity (TODA and STEIN, 2003;TODA et al, 2005;MALLMAN and ZOBACK, 2007), as well as observed clustering of strong earthquakes (PAPADIMITRIOU and KARAKOSTAS, 2003;PAPADIMITROU et al, 2004), suggest that failure on one fault may affect earthquake occurrence on another fault, with changes to the static stress field being an obvious physical mechanism (STEIN et al, 1997). Detailed studies of stress changes and seismicity following the occurrence of major earthquakes provide a body of anecdotal evidence that the location of aftershocks, ensuing major events and other changes in seismicity patterns in the vicinity of a major earthquake can often be explained by changes in the static stress field resulting from coseismic slip associated with the major earthquake (e.g., KING et al, 1994a;DENG and SYKES, 1997;HARRIS, 1998 and references therein;ROBINSON and MCGINTY, 2000;PAPADIMITRIOU and SYKES, 2001;STEACY et al, 2005 and references therein).…”

Section: Introductionmentioning

confidence: 91%

Correlation of Static Stress Changes and Earthquake Occurrence in the North Aegean Region

Rhoades

Papadimitriou

Karakostas

et al. 2010

Pure Appl. Geophys.

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A systematic analysis is made of static Coulomb stress changes and earthquake occurrence in the area of the North Aegean Sea, Greece, in order to assess the prospect of using static stress changes to construct a regional earthquake likelihood model. The earthquake data set comprises all events of magnitude M C 5.2 which have occurred since 1964. This is compared to the evolving stress field due to constant tectonic loading and perturbations due to coseismic slip associated with major earthquakes (M C 6.4) over the same period. The stress was resolved for sixteen fault orientation classes, covering the observed focal mechanisms of all earthquakes in the region. Analysis using error diagrams shows that earthquake occurrence is better correlated with the constant tectonic loading component of the stress field than with the total stress field changes since 1964, and that little, if any, information on earthquake occurrence is lost if only the maximum of the tectonic loading over the fault orientation classes is considered. Moreover, the information on earthquake occurrence is actually increased by taking the maximum of the evolving stress field since 1964, and of its coseismic-slip component, over the fault orientation classes. The maximum, over fault orientation classes, of linear combinations of the tectonic loading and the evolving stress field is insignificantly better correlated with earthquake occurrence than the maximum of the tectonic loading by itself. A composite stress-change variable is constructed from ordering of the maximum tectonic loading component and the maximum coseismic-slip component, in order to optimize the correlation with earthquake occurrence. The results indicate that it would be difficult to construct a time-varying earthquake likelihood model from the evolving stress field that is more informative than a time-invariant model based on the constant tectonic loading.

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“…It penetrates the whole lithosphere and incise the upper mantle [23]. As one of the world's most active faults, at least 10 earthquakes with magnitude larger than 7 have occurred along a 350 km segment of the XFZ [24]. With length of approximately 385 km, the Litang-Dewu fault is also a left-lateral strike-slip fault with nearly vertical slip [25], and it is almost parallel to the Xianshuihe fault.…”

Section: Geological Settingmentioning

confidence: 99%

Hydrogeochemical Characteristics and Evolution of Hot Springs in Eastern Tibetan Plateau Geothermal Belt, Western China: Insight from Multivariate Statistical Analysis

Shi

Wang

et al. 2017

Geofluids

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The eastern Tibetan Plateau geothermal belt is one of the important medium-high temperature geothermal belts in China. However, less work has been done on the hydrochemical characteristic and its geological origin. Understanding the chemical characteristics and the hydrochemical evolution processes is important in evaluating the geothermal energy potential in this area. In the present study, we discussed the hydrochemical properties and their origins of 39 hot springs located in the eastern Tibetan Plateau geothermal belt (Kangding-Litang-Batang geothermal belt). Cluster analysis and factor analysis are employed to character the hydrochemical properties of hot springs in different fault zones and the possible hydrochemical evolution processes of these hot springs. Our study shows that the hot springs can be divided into three groups based on their locations. The hot springs in the first group mainly originate from the volcanic rock and the springs in the second group originate from the metamorphic rock while the springs in the third group originate from the result of mixture of shallow water. Water-rock interaction, cation exchange, and the water environment are the three dominant factors that control the hydrochemical evolution process in the eastern Tibetan Plateau. These results are also in well agreement with the isotopic and chemical analysis.

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Earthquake Triggering along the Xianshuihe Fault Zone of Western Sichuan, China

Cited by 105 publications

References 25 publications

Dynamic simulation of interactions between major earthquakes on the Xianshuihe fault zone

Dynamic simulation of interactions between major earthquakes on the Xianshuihe fault zone

Correlation of Static Stress Changes and Earthquake Occurrence in the North Aegean Region

Hydrogeochemical Characteristics and Evolution of Hot Springs in Eastern Tibetan Plateau Geothermal Belt, Western China: Insight from Multivariate Statistical Analysis

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