Surface Rupture and Slip Distribution along the Zheduotang Fault in the Kangding Section of the Xianshuihe Fault Zone
AbstractThe Zheduotang fault (ZDTF) is located in the Kangding section of the Xianshuihe fault zone (XSHF). While the ZDTF plays an essential role in understanding the structural deformation pattern of the Kangding section. Little information is known about the paleoearthquake offset...
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| Format: | Article |
| Language: | English |
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GeoScienceWorld
2022-03-01
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| Series: | Lithosphere |
| Online Access: | https://pubs.geoscienceworld.org/lithosphere/article/2021/Special%202/6500707/612503/Surface-Rupture-and-Slip-Distribution-along-the |
| _version_ | 1818255786659282944 |
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| author | Jun Ma Bengang Zhou Mingming Wang Peng Guo Jinrui Liu Guanghao Ha Jing Fan |
| author_facet | Jun Ma Bengang Zhou Mingming Wang Peng Guo Jinrui Liu Guanghao Ha Jing Fan |
| author_sort | Jun Ma |
| collection | DOAJ |
| description |
AbstractThe Zheduotang fault (ZDTF) is located in the Kangding section of the Xianshuihe fault zone (XSHF). While the ZDTF plays an essential role in understanding the structural deformation pattern of the Kangding section. Little information is known about the paleoearthquake offsets and slip behavior of the ZDTF. It is therefore essential to analyze the seismic hazards in this area. Using UAV-based photogrammetry, high-resolution satellite images, and field observations, we mapped the surface trace of the fault in detail and measured the horizontal and vertical offsets geomorphological landforms along the fault. The binned cumulative offset probability density (COPD) distribution was calculated to analyze single-event and multievent cumulative offsets. We found that the ZDTF has scarps along its entire ~46 km length, and the offset distributions of its northwestern (NW) and southeastern (SE) sections feature different characteristics. The SE section follows a uniform slip model based on the relationship between cumulative and coseismic offsets. We estimated the maximum potential earthquake magnitudes of the NW section and SE section to be M6.6 and M7.0, respectively, from the measured offsets and empirical formulas. Finally, we discussed the seismic hazard of the ZDTF based on our findings and paleoearthquake data. The NW section is at risk of large earthquakes recurring in the future, whereas the SE section has a low risk of a >M7.0 earthquake recurring in the next 100 years. If these two sections rupture at the same event in the future, the maximum potential magnitude of the ZDTF is M7.2. |
| first_indexed | 2024-12-12T17:17:24Z |
| format | Article |
| id | doaj.art-cb7d4916f63e4d2298b5928f0e7a740d |
| institution | Directory Open Access Journal |
| issn | 1941-8264 1947-4253 |
| language | English |
| last_indexed | 2024-12-12T17:17:24Z |
| publishDate | 2022-03-01 |
| publisher | GeoScienceWorld |
| record_format | Article |
| series | Lithosphere |
| spelling | doaj.art-cb7d4916f63e4d2298b5928f0e7a740d2022-12-22T00:17:44ZengGeoScienceWorldLithosphere1941-82641947-42532022-03-012021Special 210.2113/2022/6500707Surface Rupture and Slip Distribution along the Zheduotang Fault in the Kangding Section of the Xianshuihe Fault ZoneJun Ma0http://orcid.org/0000-0002-8866-0833Bengang Zhou1http://orcid.org/0000-0003-0667-7808Mingming Wang2http://orcid.org/0000-0002-4241-5357Peng Guo3http://orcid.org/0000-0002-0133-1720Jinrui Liu4http://orcid.org/0000-0002-9699-5203Guanghao Ha5http://orcid.org/0000-0002-7834-8416Jing Fan6http://orcid.org/0000-0002-3698-1387Key Laboratory of Active Tectonics and Volcano Institute of Geology China Earthquake Administration Beijing China cea.gov.cnKey Laboratory of Active Tectonics and Volcano Institute of Geology China Earthquake Administration Beijing China cea.gov.cnEarthquake Administration of Sichuan Province Chengdu ChinaKey Laboratory of Active Tectonics and Volcano Institute of Geology China Earthquake Administration Beijing China cea.gov.cnKey Laboratory of Active Tectonics and Volcano Institute of Geology China Earthquake Administration Beijing China cea.gov.cnKey Laboratory of Active Tectonics and Volcano Institute of Geology China Earthquake Administration Beijing China cea.gov.cnUniversity of Chinese Academy of Sciences Beijing China ucas.ac.cn AbstractThe Zheduotang fault (ZDTF) is located in the Kangding section of the Xianshuihe fault zone (XSHF). While the ZDTF plays an essential role in understanding the structural deformation pattern of the Kangding section. Little information is known about the paleoearthquake offsets and slip behavior of the ZDTF. It is therefore essential to analyze the seismic hazards in this area. Using UAV-based photogrammetry, high-resolution satellite images, and field observations, we mapped the surface trace of the fault in detail and measured the horizontal and vertical offsets geomorphological landforms along the fault. The binned cumulative offset probability density (COPD) distribution was calculated to analyze single-event and multievent cumulative offsets. We found that the ZDTF has scarps along its entire ~46 km length, and the offset distributions of its northwestern (NW) and southeastern (SE) sections feature different characteristics. The SE section follows a uniform slip model based on the relationship between cumulative and coseismic offsets. We estimated the maximum potential earthquake magnitudes of the NW section and SE section to be M6.6 and M7.0, respectively, from the measured offsets and empirical formulas. Finally, we discussed the seismic hazard of the ZDTF based on our findings and paleoearthquake data. The NW section is at risk of large earthquakes recurring in the future, whereas the SE section has a low risk of a >M7.0 earthquake recurring in the next 100 years. If these two sections rupture at the same event in the future, the maximum potential magnitude of the ZDTF is M7.2.https://pubs.geoscienceworld.org/lithosphere/article/2021/Special%202/6500707/612503/Surface-Rupture-and-Slip-Distribution-along-the |
| spellingShingle | Jun Ma Bengang Zhou Mingming Wang Peng Guo Jinrui Liu Guanghao Ha Jing Fan Surface Rupture and Slip Distribution along the Zheduotang Fault in the Kangding Section of the Xianshuihe Fault Zone Lithosphere |
| title | Surface Rupture and Slip Distribution along the Zheduotang Fault in the Kangding Section of the Xianshuihe Fault Zone |
| title_full | Surface Rupture and Slip Distribution along the Zheduotang Fault in the Kangding Section of the Xianshuihe Fault Zone |
| title_fullStr | Surface Rupture and Slip Distribution along the Zheduotang Fault in the Kangding Section of the Xianshuihe Fault Zone |
| title_full_unstemmed | Surface Rupture and Slip Distribution along the Zheduotang Fault in the Kangding Section of the Xianshuihe Fault Zone |
| title_short | Surface Rupture and Slip Distribution along the Zheduotang Fault in the Kangding Section of the Xianshuihe Fault Zone |
| title_sort | surface rupture and slip distribution along the zheduotang fault in the kangding section of the xianshuihe fault zone |
| url | https://pubs.geoscienceworld.org/lithosphere/article/2021/Special%202/6500707/612503/Surface-Rupture-and-Slip-Distribution-along-the |
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