【作者】 马晓冰； 孔祥儒； 刘宏兵； 闫永利；

【Author】 Ma Xiaobing,Kong Xiangru,Liu Hongbing and Yan yongli Institute of Geology and Geophysics,Chinese Academy of Sciences,100101

【机构】 中国科学院地质与地球物理研究所；

【摘要】 本文给出了青藏高原东部察隅-清水河剖面大地电磁测深探测的结果。经过二维反演得到了研究剖面的电阻率随深度分布图,沿剖面电阻率分布具有横向分区、纵向分层的特征;班公湖-怒江缝合带和金沙江缝合带同为高原内重要的电性分割带,其中班公湖-怒江缝合带表现为电阻率相对低值带,金沙江缝合带为电性梯度带;北羌塘和巴颜喀拉地壳中、下部的高导体可能是在构造演化过程中由于俯冲剪切生热造成的局部熔融体。更多还原

【Abstract】 The results of Zay(u|¨)-QingshuiHe MT sounding profile carried out in eastern Qinghai-Tibetan Plateau are presented in this paper.Using 2-D RRI method,The resistivity distribution with depth is obtained along the profile.It is featured by the resistivity zones in horizontal direction and layers in vertical direction.Bangong-Nujiang suture zone and Jinshajiang suture zone are both important electrical conductivity-separating zones in the plateau,and the former is a zone with relatively low resistivity while the latter is an electrical conductivity gradient zone. The highly electrical conductive bodies in the mid and lower crust of northern Qiangtang and Bayan Har Terrain might be caused by regional melting due to shear heating during the process of subduction in tectonic evolution.更多还原