论文部分内容阅读
自从Argand提出关于亚洲构造的观点之后,认为西藏是大陆碰撞的最好实例,今天在极块构造方面出现了一些疑问,这就是喜马站雅山以北抬升4000米,延伸1000余公里的广大地区并不是新生代时期印度板块和欧亚板块直接碰撞的结果。然而推动这个广大地区的力及其原因不明的地壳加厚现象在目前并没有什么显示。相反,西藏的地壳却是处于东西向的拉张状态。1980年的中法考察队很好地证实了中国地质学家根据陆地卫星,震源机制解和航空照片所做的初步结论,下面我们概述现代正断层最明显的证据和某些初步结论。
Since Argand proposed the view on Asian tectonics, he believed that Tibet is the best example of a continental collision. Today, there are some doubts about the pole-block structure. This is the vast elevation of 4,000 meters and 1,000 kilometers north of the Yamanjo Station The area is not the result of a direct collision between the Indian and Eurasian plates during the Cenozoic. However, there is currently no indication that the forces pushing the vast region and the unexplained crustal thickening have been shown. On the contrary, the crust in Tibet is in an east-west tension. The Chinese-French expedition in 1980 well confirmed the preliminary conclusions made by Chinese geologists based on terrestrial satellites, focal mechanism solutions, and aerial photographs. Below we summarize the most obvious evidence and some preliminary conclusions of modern normal faults.