孝丰—三门湾断裂是浙江地区一条规模较大的NW向断裂,该断裂与萧山—球川断裂交汇处曾发生929年杭州5 1/4级地震,与余姚—丽水断裂交汇处曾发生1998年嵊州—新昌4.5级地震。研究认为孝丰—三门湾断裂广德—杭州段大致以苏州—安吉断裂和湖州—临安断裂为界,分为广德—安吉段、安吉—黄湖段和黄湖—瓶窑段,活动性质为正断层,倾向NE。通过野外地质地貌调查和ESR年龄样品测年认为,该断裂最新活动时代为中更新世晚期。

The Xiaofeng-sanmenwan fault is a large-scaled NW trending fault in Zhejiang Province,The M5 1/4 Hangzhou earthquake of 929CE and the M4.5 Shengzhou-Xinchang earthquake of 1998 occurred at the intersection of the Xiaoshan-Qiuchuan fault and the Yuyao-Lishui fault. In this paper,the Guangde-Hangzhou segment of Xiaofeng-Sanmenwan fault in the is divided into the Guangde-Anji segment,the Anji-Huanghu segment and the Huanghu-Pingyao segment by the Suzhou-Anji fault and the Huzhou-Lin'an fault,characterized by normal fault. Based on field geological survey and the ESR dating result,it is concluded that the latest active time of the fault is in late Middle Pleistocene.

P315

浙江省地震局科技创新团队浙江省深部构造环境研究项目资助