摘要
采用高分辨折射和宽角反射/折射综合地震探测方法,在浙江省中部沿黄岩、临海、东阳、桐庐、昌化进行深部构造探测,获得一条长约350km的速度结构剖面。探测结果表明,地壳结构具有明显的多层性,存在3个速度间断面;基底速度结构图像揭示了速度结构的横向非均匀性,这种不均匀性既对应于地质构造单元的分界线或断裂构造带,也反映出东西部构造特征的差异性。
Using high resolution refraction and wide-angle reflection/refraction integrated seismic detection method,deep structural exploration is carried out at Huangyan,Linhai,Dongyang,Tonglu and Changhua in the central part of Zhejiang province.A velocity structure section with a length of about 350 km is obtained.The results show that the crustal structure has obvious multi layers,with three velocity discontinuities,and the velocity structure image reveals the heterogeneity of velocity structure in the basal lateral.This heterogeneity corresponds to the tectonic unit in the boundary or fracture tectonic belt,and also reflects the differences between east and west tectonic characteristics.