华北文安—蔚县—察哈尔右翼中旗剖面S波资料的地质解释  

GEOLOGICAL INTERPRETATION OF S WAVE DATA ALONG THE WENAN-YUXIAN-CAHAYOUZHONGQI PROFILE IN NORTH CHINA

作　　者：刘宝峰[1] 张先康[1] 张成科[1] 宋松岩 周雪松[1] 

机构地区：[1]中国地震局地球物理勘探中心,郑州450003

出　　处：《地震地质》2000年第1期81-88,共8页Seismology and Geology

基　　金：国家科委"八五"科技攻关项目!(8590 7)

摘　　要：通过对文安—蔚县—察哈尔右翼中旗深地震测深剖面S波资料的处理解释 ,获得本区二维壳幔速度结构和波速比结构。该区的上、中地壳主要由花岗岩组成 ,整体呈脆性 ,其速度比γ值为 1 72左右 ;下地壳的γ值一般为 1 78;上地幔顶部的γ值在 1 82左右 ,表明下地壳与上地幔顶部整体呈塑性的特征。根据波组及γ值横向变化特征 ,推断了该区的几条深大断裂 ,结合本地区的地震活动 ,推测地震的孕育发生不仅与构造相关 ,而且与该区的岩石性质有关。In this paper,the structure of twodimensional crustmantle velocity and ratio of wave velocity γ is obtained by interpreting S wave data of depth seismic sounding profile alone Wenan—Yuxian—Cahayouzhongqi. The upper crust and middle crust is mainly made of granite, and all is brittle, the γ value for ratio of velocity is about 1.72 for the lower crust it is 1.78; and for the top of upper mantle it is 1.82. The result shows that the lower crust and the top of upper mantle have plastic features. In terms of the features of wave sets and lateral changes of γ, a few deep faults are inferred in this region. Combining with seismicity of this region, it is suggested that the occurrence of earthquakes is related to the structure as well as the character of rocks.

关 键 词：地震测深 波速比 速度结构 地震活动 S波资料 

分 类 号：P631.443[天文地球—地质矿产勘探] P315.63[天文地球—地质学]