摘要
介绍了大地电磁测深在西藏羌塘盆地的主要研究成果.对羌塘盆地的区域构造特征和构造格局作了初步的探讨;较详细地分析了羌塘盆地的深部地电结构.研究表明,南北羌塘在深部电性结构上具有明显的电性差异.在南羌塘和班公湖-怒江缝合带,一般有两个壳内高导层,而北羌塘一般只有一个壳内高导层,缺失下地壳高导层.这可能与青藏高原地壳物质东流有关.羌塘盆地的岩石圈厚度为100～130km.
Major results of magnetotelluric sounding in the Qiangtang Basin of Xizang(Tibet)are presented.The features of regional tectonics and tectonic framework are discussed,and the deep geoelectric structure in the Qiangtang Basin is analyzed in detail.It is showed that the south and north parts of the Qiangtang Basin have a good contrast in the deep electrical structure,in the south Qiangtang and Bangonghu-Nujiang suture,there are generally two high conductivity layers in the crust;in north Qiangtang,there is generally one high conductivity layer.The curst lacks of the high conductivity layer of the lower crust,which is probably relative to the flowage of the crustal substance toward the east.The thickness of lithosphere is about 100～130km in the Qiangtang Basin.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
1996年第2期198-202,共5页
Earth Science-Journal of China University of Geosciences
基金
国家"八五"西藏地勘专项科研成果.
关键词
大地电磁测深
岩石圈
羌塘盆地
西藏
magnetotelluric sounding
feature of regional tectonics
deep electrical structure
high conductivity layer
crust
lithosphere
Qiangtang Basin
