Abstract:

The paper discusses the characteristics of the fault activities since Quaternary and the relation between the seismicity and faults activities,basing on the analysis of Quaternary strata overlying the main faults of Longgao peninsula,shallow seismic exploration,distribution of geomorphic surfaces on both sides of the faults.The results show:1)The Zhonglou-Donghan Fault(F1),Sanshan Fault(F3)and Haikou-Jiangyin Fault(F4)are the middle Pleistocene active faults instead of the late Pleistocene active faults as

Key words: active faults, Pleistocene, Fuqing Longgao peninsula

摘要：

根据对龙高半岛主要断裂与上覆地层的切割关系考察、浅层地震勘探、断裂两侧等时地貌面的分布调查等资料,分析了断裂第四纪以来的活动特征,并探讨了地震活动与断裂活动的关系。研究结果表明:中楼-东瀚断裂(F1)、高山断裂(F2)和海口-江阴断裂(F4)属有地质、地貌证据的中更新世活动断裂;三山断裂(F3)属浅层地震勘探确定的早中更新世活动断裂;福清断裂(F5)和东张断裂(F6)属断层物质TL测年结果确定的早中更新世活动断裂。从区内≥3级中小地震沿龙田-江镜地堑边界的分布特点看,可能与三山断裂和海口-江阴断裂活动有关

关键词: 活动断裂, 更新世, 福清龙高半岛