摘要
为了精细探测西淋岗地区隐伏断裂在地下空间分布特征,在西淋岗地区共布置了8条浅层地震横波反射剖面和3条弹性波CT剖面,根据浅层地震勘探及弹性波CT成果,结合已知的地质资料,得到了以下成果:在西淋岗地区断裂由两组断裂构成,呈“X”型,一组为北西向,倾向南西,另一组为北东向,倾向北西。北东向断裂组为西淋岗断裂,北西向断裂为白坭—沙湾断裂带。北西向断裂切割北东向断裂;西淋岗地区存在软沉积物变形的迹象,断裂切割进入第四系覆盖层,表明西淋岗地区的断裂仍具有较强的活动性。结果表明,浅层地震和弹性波CT不仅可以确定断裂构造在地表的位置,而且可以精细探测断裂构造在地下空间分布特征。
In order to detect the spatial distribution characteristics of concealed faults in Xilingang area,a total ofeight shallow seismic transverse wave reflection profiles and three elastic wave CT profiles are arranged in Xilingang area.Based on the results of shallow seismic exploration and elastic wave CT and combined with the known geological data,the following results are obtained:The faults in Xilingang area,in the shape of an X,are composed of two groups,one of which is NW-trending and inclined to SW,and the other is NE-trending and inclined to NW.The NE trending fault group is Xilingang fault,and the NW trending fault zone is Baini-Shawan fault zone.NW trending fault cuts NE trending fault.There are signs of soft sediment deformation in the Xilingang area,and the faults cut into the Quaternary overlay,indicating that the faults in the Xilingang area are still highly actice.The results show that the shallow seismic and elastic wave CT can not only determine the location of fault structures on the surface,but also detect the spatial distribution characteristics of fault structures in the underground。
作者
卢进延
Lu Jinyan(Geophysical Prospecting Brigade of Guangdong Province, Guangzhou Guangdong 510800, China)
出处
《工程地球物理学报》
2021年第4期479-485,共7页
Chinese Journal of Engineering Geophysics
基金
广东省国土资源保护与治理专项(编号:2017201)。
