论文部分内容阅读
印度板块北部地形起伏较大的喜马拉雅山地区由几个构造互异的地质单元组成,依地形高、低把喜马拉雅碰撞带分成低喜马拉雅和高喜马拉雅.为了研究与主要逆冲带(含主缝合带MCT和主边界带MBT)有关的地壳电性结构,沿Rohtangpass(海拔4000 m)到Mandi(海拔400 m)剖面进行了MT探测.通过对16个测点观测资料的分析和考虑地形的二维反演,获得了沿剖面的二维电性结构.电性结构显示,在Chail和主逆冲边界带下方,东西走向的缝合带突然转向北.在下喜马拉雅的Rampur区段的元古代基底为范围较大的高阻体,而浅部地壳被逆冲带分成向北倾的电导性块体和电阻性块体.Chail逆冲带东侧低喜马拉雅Rampur区段的推挤和它西侧的基底脊柱体导致主边界带及相关的逆冲带(Kangra拐角)向北转弯,Kangra拐角处的应力可能是由于西侧基底脊柱体进入到Kangra区引起的.
The Himalayas, a region with large undulating topography in the northern Indian plate, consists of several geologic units of different structures constructed by high and low topography, dividing the Himalayan collision zone into low Himalayas and high Himalayas.In order to study the relationship between the main thrust belt MCT and the main boundary zone (MBT), the MT detection was carried out along the Rohtangpass (4000 m above sea level) to the Mandi (400 m above sea level) section.Through the analysis of the observed data from 16 measuring points and the consideration of the two-dimensional Inversion results in a two-dimensional electrical structure along the section.Electrical structures show that the east-west stitching suddenly turns north under the Chail and main thrust boundary.The Proterozoic basement in the lower Rampur section of the Himalayas is the range Larger high resistive body, and the shallow crust is divided by the thrust belt into a northward-directed conductive mass and a resistive mass.Pushing east of the Lower Himalayan section of the Dhaka thrust belt and its base to the west The spine causes the main boundary zone and the associated kennel (corner of Kangra) to turn north. The stress at the corner of Kangra may be due to the entry of the west basal vertebral column into the Kangra Zone.