首都圈跨断层形变反映的断层活动方式及其成因探讨

Abstract

Abstract: Temporary cross-fault observation data in the past tens years in the capital region of China is studied in the paper. Distribution of fault strike-slips indicates the complexity of fault activities in the region. Left-lateral strike-slip of the Shizhuang fault, that trending northwest, is positively correlated with time. The mean left-lateral strike-slip rate on the fault is about 0.08 mm/a during the observing period. Left-lateral strike-slip of the Qiangzhilu fault, that is also trending northwest, is less than that of the Shizhuang fault. The northeast trending faults in the capital region are also mainly left-lateral strike-slip faults. Strike-slip on these faults are not clearly correlated with time. Based on studies on fault activities, the regional plane elastic finite element model is constructed to simulate fault activities in the capital region. The simulated results show that fault activities in the capital region are controlled by the left-lateral Zhangjiakou-Bohai zone. Faults with different trendings in the capital region are mainly left-lateral strike-slip faults.

Key words: Fault activity, Cross-fault observation, numerical simulation, Capital region

CLC Number:

P315.7

CAO Jian-ling, ZHANG Jing, WANG Hui, FANG Yin. Fault Activities and Their Geodynamic Cause Derived from Cross-fault Observation in the Capital Region of China[J]. EARTHQUAKE, 2011, 31(4): 77-85.

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Fault Activities and Their Geodynamic Cause Derived from Cross-fault Observation in the Capital Region of China

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