Abstract：Using GNSS horizontal velocity field data from 2009-2011, 2011-2013, 2013-2015 and 2015-2018, based on block and negative dislocation model, this paper inverts the dynamic change process of locking degree and slip deficit of the Anninghe-Zemuhe fault zone in corresponding four periods. We study the dynamic characteristics of the Anninghe-Zemuhe fault zone based on the GNSS velocity field across fault profiles. The results show that the locking distribution of the Anninghe-Zemuhe fault zone changes periodically, but the Shimian-Mianning section is always in a highly locked state. From 2013 to 2018, the movement rate of Sichuan-Yunnan block first decreased and then increased compared with the South China block, which corresponds to the locking and then unlocking process of the Zemuhe fault zone. According to the cross-fault GNSS velocity profile, the motion characteristics of the Anninghe-Zemuhe fault zone show sectional changes.
FAN Xin,GONG Xiaoying,CAI Fuzong et al. Dynamic Changes of Locking and Slip Distribution in the Anninghe-Zemuhe Fault Zone[J]. jgg, 2023, 43(9): 914-918.
