摘要
本文根据中国科学院地球物理研究所1984年在攀西地区进行综合地球物理考察期间,所取得的西昌—渡口—牟定地带爆炸地震资料,进行了二维射线追踪处理,得到该地带的二维地壳结构和速度分布图.研究结果表明,该地带地壳平均速度为6.25km/s,地壳厚度为55km.但在永仁—渡口一带的地壳厚度为52km,地幔有上隆的趋势.浅层结构清楚地勾画出了该地带内的盆地和断裂的构造,结合该地区大地构造演化和矿产的分布进行了讨论.
In this paper, according to the explosion seismic data obtained from a combinative geophysical survey on Pan-Xi region by Institute of geophysics, Academia, Sinica in 1984, the crustal structure and velocity distribution along Xichang-Dukou-Muding profile was imaged by 2-D raytracing method. The results show hat crustal average velocity is 6.25km/s, the thickness is 55km, but between Yongren and Dukou region, the crustal thickness is only 52km and upper mantle has a uplift tendency. At the same time a shallow structure indicate clearly that there exist faults and basins in the study region. Finally, combination with geotectonic evolution and minerals distribution law, a further discussion was conducted.
出处
《地球物理学报》
SCIE
EI
CAS
CSCD
北大核心
1992年第4期451-458,共8页
Chinese Journal of Geophysics
基金
国家自然科学基金
关键词
地壳结构
爆炸
地震
西昌渡口
Pan-Xi structure belt, Cliuxiong basin, Explosion seismic study, 2-D crustal structure
