Advances in composition and dating methods of fault gouge and weakening mechanisms of earthquake faults in bedrock area
Fault gouges result from the sliding of brittle faults and can be used to determine the deformational characteristics, formation ages and weakening mechanisms of earthquake faults, which are of great significance for structural geology and earthquake geology. Therefore, the comprehensive understandi...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Bulletin of Geological Science and Technology
2022-09-01
|
| Series: | 地质科技通报 |
| Subjects: | |
| Online Access: | https://dzkjqb.cug.edu.cn/en/article/doi/10.19509/j.cnki.dzkq.2022.0138 |
| _version_ | 1797277566699044864 |
|---|---|
| author | Xianbing Xu Fei Deng Dun Wang Xiyi Luo |
| author_facet | Xianbing Xu Fei Deng Dun Wang Xiyi Luo |
| author_sort | Xianbing Xu |
| collection | DOAJ |
| description | Fault gouges result from the sliding of brittle faults and can be used to determine the deformational characteristics, formation ages and weakening mechanisms of earthquake faults, which are of great significance for structural geology and earthquake geology. Therefore, the comprehensive understanding of the research findings and its advances in fault gouges will contribute to palaeoseismic investigations. On the basis of collected and absorbed data, we introduced comprehensive advances in the components of fault gouges, surface textures of quartz grains from fault gouges, dating methods of fault gouges and weakening mechanisms of earthquake faults. The fault gouge is mainly composed of clay minerals and powder and debris of wall rocks. The clay minerals mainly consist of montmorillonite, illite, kaolinite and chlorite. The powder and debris of wall rocks are mainly composed of quartz, feldspar, mica, calcite and dolomite. Quartz, illite and calcite selected from fault gouges could be used to distinguish the polysstages of faulting and date its formation ages. Geochronological methods include surface texture analysis of quartz grains, electron spin resonance (ESR) and optically stimulated luminescence (OSL)dating of quartz, K-Ar or 40Ar/39Ar dating of illite, and U-Pb dating of calcite. The weakening mechanisms of earthquake faults consist of the powder of minerals, the formation of new minerals and fabric development in fault gouges, and frictional heating, frictional melting and thermal pressurization after fault initialization. |
| first_indexed | 2024-03-07T15:50:16Z |
| format | Article |
| id | doaj.art-53b5d336f4194d4bb9c54b3c963c40de |
| institution | Directory Open Access Journal |
| issn | 2096-8523 |
| language | zho |
| last_indexed | 2024-03-07T15:50:16Z |
| publishDate | 2022-09-01 |
| publisher | Editorial Department of Bulletin of Geological Science and Technology |
| record_format | Article |
| series | 地质科技通报 |
| spelling | doaj.art-53b5d336f4194d4bb9c54b3c963c40de2024-03-05T02:58:18ZzhoEditorial Department of Bulletin of Geological Science and Technology地质科技通报2096-85232022-09-0141512213110.19509/j.cnki.dzkq.2022.0138dzkjtb-41-5-122Advances in composition and dating methods of fault gouge and weakening mechanisms of earthquake faults in bedrock areaXianbing Xu0Fei Deng1Dun Wang2Xiyi Luo3School of Earth Sciences, China University of Geosciences(Wuhan), Wuhan 430074, ChinaCollege of Civil Engineering, Tongji University, Shanghai 200092, ChinaSchool of Earth Sciences, China University of Geosciences(Wuhan), Wuhan 430074, ChinaFoshan Geological Bureau of Guangdong Province, Foshan Guangdong 528000, ChinaFault gouges result from the sliding of brittle faults and can be used to determine the deformational characteristics, formation ages and weakening mechanisms of earthquake faults, which are of great significance for structural geology and earthquake geology. Therefore, the comprehensive understanding of the research findings and its advances in fault gouges will contribute to palaeoseismic investigations. On the basis of collected and absorbed data, we introduced comprehensive advances in the components of fault gouges, surface textures of quartz grains from fault gouges, dating methods of fault gouges and weakening mechanisms of earthquake faults. The fault gouge is mainly composed of clay minerals and powder and debris of wall rocks. The clay minerals mainly consist of montmorillonite, illite, kaolinite and chlorite. The powder and debris of wall rocks are mainly composed of quartz, feldspar, mica, calcite and dolomite. Quartz, illite and calcite selected from fault gouges could be used to distinguish the polysstages of faulting and date its formation ages. Geochronological methods include surface texture analysis of quartz grains, electron spin resonance (ESR) and optically stimulated luminescence (OSL)dating of quartz, K-Ar or 40Ar/39Ar dating of illite, and U-Pb dating of calcite. The weakening mechanisms of earthquake faults consist of the powder of minerals, the formation of new minerals and fabric development in fault gouges, and frictional heating, frictional melting and thermal pressurization after fault initialization.https://dzkjqb.cug.edu.cn/en/article/doi/10.19509/j.cnki.dzkq.2022.0138earthquake faultfault gougecompositiondating methodweakening mechanism of fault |
| spellingShingle | Xianbing Xu Fei Deng Dun Wang Xiyi Luo Advances in composition and dating methods of fault gouge and weakening mechanisms of earthquake faults in bedrock area 地质科技通报 earthquake fault fault gouge composition dating method weakening mechanism of fault |
| title | Advances in composition and dating methods of fault gouge and weakening mechanisms of earthquake faults in bedrock area |
| title_full | Advances in composition and dating methods of fault gouge and weakening mechanisms of earthquake faults in bedrock area |
| title_fullStr | Advances in composition and dating methods of fault gouge and weakening mechanisms of earthquake faults in bedrock area |
| title_full_unstemmed | Advances in composition and dating methods of fault gouge and weakening mechanisms of earthquake faults in bedrock area |
| title_short | Advances in composition and dating methods of fault gouge and weakening mechanisms of earthquake faults in bedrock area |
| title_sort | advances in composition and dating methods of fault gouge and weakening mechanisms of earthquake faults in bedrock area |
| topic | earthquake fault fault gouge composition dating method weakening mechanism of fault |
| url | https://dzkjqb.cug.edu.cn/en/article/doi/10.19509/j.cnki.dzkq.2022.0138 |
| work_keys_str_mv | AT xianbingxu advancesincompositionanddatingmethodsoffaultgougeandweakeningmechanismsofearthquakefaultsinbedrockarea AT feideng advancesincompositionanddatingmethodsoffaultgougeandweakeningmechanismsofearthquakefaultsinbedrockarea AT dunwang advancesincompositionanddatingmethodsoffaultgougeandweakeningmechanismsofearthquakefaultsinbedrockarea AT xiyiluo advancesincompositionanddatingmethodsoffaultgougeandweakeningmechanismsofearthquakefaultsinbedrockarea |