台湾造山带主要断层闭锁程度与滑动亏损特征  

The Blocking Degree and Slip Deficit Characteristics of the Main Faults in the Taiwan Orogenic Belt

作　　者：李强[1] 王紫燕[1] LI Qiang;WANG Ziyan(Fujian Earthquake Agency,Fuzhou 350003,China)

机构地区：[1]福建省地震局,福州350003

出　　处：《华南地震》2022年第4期48-53,共6页South China Journal of Seismology

基　　金：中国地震局震情跟踪定向工作任务(2020010201)。

摘　　要：利用2016—2018年GPS水平速度场数据,基于块体旋转与块体边界断层闭锁的负位错模型,反演了台湾造山带主要断层的闭锁程度和滑动亏损,并讨论了断层的强震危险性。结果显示:该区域纵谷断裂北段、狮潭断层、四季断层和潮州断层闭锁程度相对较强,其他断层闭锁程度较弱;结合滑动亏损分布和历史强震活动特征,分析认为纵谷断裂北段、四季断层和潮州断层强震危险性值得关注。Based on the negative dislocation model of the block rotation and fault locking of the boundary,the paper inverted the blocking degree and the slip deficit of the main faults in the Taiwan Orogenic Belt by using the GPS horizontal velocity field data from 2016 to 2018,and discussed the strong earthquake risk of the faults.The results show that the high locking concentrate on the northern segment of the Longitudinal Valley fault,Shitan fault,Siji fault and Chaozhou fault.The locking degree of others is relatively low.Combining the slip deficit distribution and the characteristics of the historical strong earthquakes in this region,it is concluded that risk of strong earthquakes of the northern segment of the Longitudinal Valley fault,Siji fault and Chaozhou fault should be paid more attention.

关 键 词：断层闭锁 滑动亏损 台湾地震 台湾造山带 GPS速度场 

分 类 号：P315[天文地球—地震学]