狮子洋断裂精确定位及活动性初步研究

狮子洋断裂位于珠江入海口的东侧,为北西向的隐伏断裂。为了更深入研究狮子洋断裂,通过地面追索(野外地震地质调查)、浅层人工地震横波/纵波反射勘探、排钻对比、第四纪地层年代学方法,对狮子洋断裂进行精确定位,并研究其活动性。得到如下结论：断裂由F1～F4四条正断裂组成,形成狮子洋断裂束,断层总体走向约330°,倾向SW,F4断裂倾向NE,倾角为60°～80°;狮子洋断裂(东支F1、F2、F3)在中更新世晚期以来没有活动,为早-中更新世断层。

Precise Location and Activity of Shiziyang Fault

Shiziyang Fault is located in the east of the Pearl River Estuary, and it is a North-west buried fault. In order to further study the Shiziyang fault, the ground recourse (field seismic geological survey), shallow artificial seismic shear wave/p-wave reflection exploration, drilling contrast, quaternary strata chronology methodare used to investigatethe precise location andactivity of Shiziyang fault. The conclusionsare as follows: the fracture from F1 to F4 Normal faults, four forms as Shiziyang Fault fracture, fault general trend of SW, F4 tended to NE, angle 60° ~ 80°. The Shiziyang Fault (east branch F1,F2,F3) has not been active since the Late Middle Pleistocene, and is a Early-middle Pleistocene fault.