[1]CHEN Changyun,ZHAN Wei,ZHENG Zhijiang,et al.Analyzing the Tectonic Deformation Characteristics of the Eastern Part of the East Kunlun Fault and Its Adjacent Areas Using GPS and Leveling Data[J].Journal of Seismological Research,2022,45(01):36-47.[doi:10.20015/j.cnki.ISSN1000-0666.2022.0005]
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Analyzing the Tectonic Deformation Characteristics of the Eastern Part of the East Kunlun Fault and Its Adjacent Areas Using GPS and Leveling Data
Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume:
45
Number of periods:
2022 01
Page number:
36-47
Column:
Public date:
2022-01-20
- Title:
- Analyzing the Tectonic Deformation Characteristics of the Eastern Part of the East Kunlun Fault and Its Adjacent Areas Using GPS and Leveling Data
- CLC:
- P315.241
- DOI:
- 10.20015/j.cnki.ISSN1000-0666.2022.0005
- Abstract:
- Based on the GPS data in the period of 1999—2016 and the regional precision leveling data from 1980 to 2010,the slip rates and regional tectonic deformation characteristics of the major faults in the eastern part of the East Kunlun Fault and its adjacent regions are obtained.The attenuation of slip rate from west to east along the East Kunlun Fault is very obvious:from～10 mm/a in the Xidatan-Dongdatan section,and the Arak Lake section eastward to～2 mm/a in the Tazang section,with a rate decrease gradient of～1 mm/a every 100 kilometers from west to east; the Arak Lake,the Tuosuo Lake,the Xia Dawu and the Tazang sections show certain weak extrusion characteristics.GPS profiles across the Minjiang Fault show that the regional extrusion deformation gradually weakens from the west of the Longriba Fault to the east of the Longmenshan Fault.The maximum main strain direction is N-NEE; the high value of the maximum shear strain is located in the intersection area of the Arak Lake and the Tuosuo Lake,and the middle part of the Longriba Fault in the BayanHar block.The analysis of the tectonic transformation relationship between the eastern part of the East Kunlun Fault and its adjacent regions shows that the uplift and deformation in the Minshan area is mainly caused by the west-to-east movement of the BayanHar block blocked by the South China block due to the continuous collision of the Indo-European plate,rather than the tectonic transformation caused by the eastward extension of the East Kunlun Fault.
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Last Update:
2022-01-20