期刊
ADVANCES IN SPACE RESEARCH
卷 48, 期 12, 页码 2005-2015出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.asr.2011.08.020
关键词
Interseismic slip rate; Garze-Yushu fault belt; InSAR; Tibetan Plateau; Recurrence interval
类别
资金
- National Natural Science Foundation of China [41074007, 40974017, 41021061, 40874003]
- 111 Project
- National Department Public Benefit Research Foundation (Earthquake) [200808080]
- National High Technology Research and Development Program of China (863 Program) [2009AA12Z317]
- Specialized Research Fund for the Doctoral Program of Higher Education [20090141110055]
- Fundamental Research Funds for the Central Universities [3101036]
- Key Laboratory of Geospace Environment and Geodesy (LOGEG), Ministry of Education, China [10-02-11]
- Natural Environmental Research Council (NERC) [NE/H001085/1]
- Natural Environment Research Council [NE/H001085/1, come20001, earth010007] Funding Source: researchfish
- NERC [come20001, NE/H001085/1] Funding Source: UKRI
InSAR time series techniques can provide high-spatial resolution deformation fields across an active fault belt, even for zones with heavy vegetation coverage. An interseismic deformation map across the Garze-Yushu fault belt in the Tibetan Plateau, similar to 300 km by similar to 100 km, is derived from C-band Envisat/ASAR imagery collected between 2003 and 2010. Unlike previous research, we obtain a lookup figure which relates the slip rate with the fault locking depth, the dip angle and the rake angle. The estimated slip rate changes significantly with the locking depth and the rake angle, but relatively little with the dip angle. When considering the focal mechanism solutions of historical earthquake along the Garze-Yushu fault, the interseismic slip rate of the Garze-Yushu fault is close to a value of 6.4 mm/yr, which is between the highest (18.2 mm/yr) and the lowest (3.1 mm/yr) slip rate from GPS estimations, but slightly less than the minimum value (similar to 7 mm/yr) from the geological estimations. The earthquake recurrence interval on the Yushu part of Garze-Yushu fault equals 272 yr, and the April 14, 2010 Mw 6.9 earthquake has not completely released the accumulated strain energy between 1738 and 2010. (C) 2011 COSPAR. Published by Elsevier Ltd. All rights reserved.
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