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本文介绍北京地区康庄—大厂剖面试验的地震转换波测深法得到的地壳、上地幔结构.显示层状和断块的特征。分析本区地表构造与深部构造的特征及其相互关系表明,本区地壳内存在过很强的近 NWW-SEE 向水平压应力,从而造成本区隆、凹的各基本构造单元.本区震源分布有两种情况:高丽营断裂以西震源大都分布在“花岗岩”层的顶面和底面上,在此断裂以东地区震源主要分布在断裂带上(图1).
In this paper, the crust and upper mantle structure obtained from the seismic inversion wave sounding test of Kangzhuang-Dachang section test in Beijing area is presented, showing the characteristics of layered and fault blocks. Analysis of the characteristics of the surface structure and deep structure in this area and their correlations show that there is a strong horizontal NWW-SEE compressive stress in the crust of this area, resulting in the basic tectonic units of uplift and depression in this area. There are two cases of distribution: Most of the focal earthquakes west of the Gaolingying fault are distributed on the top and bottom of the “granite” layer, and the earthquakes in the east of the fault are mainly distributed on the fault zone (Fig. 1).