平潭岛外～乌丘屿段滨海断裂活动性分析

Activity of the BinHai fault zone between the PingTan island and the WuQiu island

滨海断裂位于福建沿海与台湾海峡盆地之间，呈带状分布。研究认为该断裂带为-深大断裂带，地震活动频繁，对其两侧的地质构造起着一定的控制作用。通过对平潭岛外-乌丘屿段高分辨多道地震的解释，发现该区海域不但断裂比较发育，而且活动时代较新，见有数个断点断过晚更新世地层。本文结合该区域内浅地层剖面与地质测年，综合分析断裂的活动时代，认为平潭岛外滨海断裂至少在晚更新世晚期仍处于频繁活动之中，甚至最新活动时代可能为全新世。

The BinHai fault zone located in the area between the FuJian province coast and the TaiWan straits, distributing in belt. The BinHai fault is long in scope and deep in depth, and it control the geological structure of both sides. Earthquake happens frequently in this belt. Lots of newly active faults were found in between The PingTan island and the WuQiu island through interpreting high resolution seismic test, and several faults have broken the late Pleistocene epoch strata. In this paper, through analyzing with subbottom profile and geological age measurement, concluded that the fault zone was active in the late Pleistocene epoch at least, and deduced that the latest active age of this fault zone maybe lasted to Holoeene epoch between the PingTan island and the WuQiu island.