延庆─怀来地区地壳细结构──利用深地震反射剖面  

FINE CRUSTAL STRUCTURE IN YANQING─HUAILAI REGION BY DEEP SEISMIC REFLECTION PROFILING

作　　者：张先康[1] 王椿镛[1] 刘国栋[1] 宋建立[1] 罗力雷 吴涛[1] 吴建春[1] 

机构地区：[1]国家地震局地球物理勘探中心,国家地震局地球物理研究所,国家地震局地质研究所,国家地震局震害防御司

出　　处：《地球物理学报》1996年第3期356-364,共9页Chinese Journal of Geophysics

基　　金：国家科委"八五"科技重点项目

摘　　要：１９９２年底在延庆－怀来地区实施了深地震反射剖面测量，目的是通过对该区地壳细结构的研究来探讨延庆－怀来盆地形成演化的机制和过程，以及与该区地震活动图像的关系．结果表明，研究区上部地壳总体上呈“透明”性质，厚２５－２６ｋｍ；下部地壳具有强烈的反射性质，厚约１４－１５ｋｍ．壳幔过渡带是由双程走时约２ｓ和厚约５－６ｋｍ的水平反射叠层所组成，莫霍界面具有深度深（约３９－４０ｋｍ）和平坦的特点。At the end of 1992, deep seismic reflection measurements were carried out in Yanqing-Huailai region by Research Center of Exploration Geophysics and Institute of Geophysics of State Seismalogical Bureau.The object of this experiment is to investigate the evolution mechanism and process of Yanqing-Huailai basin and its relation to the seismicity in this region.The results indicate that the upper crust is characterized by seismic transparency with the thickness of about 25-26km and the lower crust is characterized by high reflectivity with the thickness of about 14-15km in this region.The crust-mantle transition zone consists of sets of subhorizontal reflections refferred to seismic lamellae with TWT of 2 seconds and the thickness of about 5- 6km. The Moho is flat and its depth is about 39-40km in this region.

关 键 词：怀来盆地 深地震反射 地壳细结构 地壳结构 

分 类 号：P313.2[天文地球—固体地球物理学]