论文部分内容阅读
本文利用中法合作研究获得的定日—格尔木天然地震记录资料所揭示的青藏岩石圈存在的各向异性变化，讨论了雅鲁藏布江缝合带南北地幔物质运动方向的差异。结合区域重力场、地热和大量地质资料，提出了解释青藏高原形成和隆升的新模式。青藏高原是在印度板块和欧亚板块强烈碰撞挤压下，地壳缩短变形增厚，碰撞挤压达于极限，地幔内物质产生热熔变，导致了受热幔壳的急剧膨胀，托浮起上覆地壳整体，形成了巨大高耸而且地形平坦的高原。喜马拉雅造山带则是印度板块北缘俯冲受阻，逆冲叠覆堆积变形的结果。
In this paper, the anisotropy of the Qinghai-Tibet lithosphere as revealed by the natural seismic records of Dingri-Golmud obtained from the Sino-French cooperation study is discussed, and the differences of material movement direction between the north and south mantle in the Yarlung Zangbo River suture are discussed. Combined with regional gravity field, geothermal and a large number of geological data, a new model to explain the formation and uplift of the Tibetan Plateau is proposed. The Qinghai-Xizang Plateau was crushed and crushed under the intense collision between the Indian plate and the Eurasian plate. The crust shortens to deform and thicken. The collision and extrusion reach the limit. The material in the mantle becomes hot-melt, resulting in the rapid expansion of the heated mantle and the floating Cover the whole crust, forming a huge towering terrain and flat plateau. The Himalayan orogenic belt is the result of the subduction of the northern margin of the Indian plate and the accumulation of thrust deformation and accumulation.