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Discussion of klippe genesis in Northwest Sichuan
YAN Shi-yong1,LI Yue2,ZHOU Yao-qi1,YANG Heng-shu3
(1. College of Geo-Resources and Information in China University of Petroleum, Qingdao 266555, Chirm ;2. College of Geosciences and Engineering, Shandong University of Science and Technology,Qingdao 266510,China;3. School of Environment and Resources, Southwest University of Science and Technology, Mianyang 621000 9 China)
Abstract:
The klippen wildly distribute in Northwest Sichuan, and there are different ideas for the klippe genesis. The idea proposed by ZHOU Zilong is that the klippe glided on the giant glacier and the ice water as the lube and power. In order to verify the idea's accuracy, field observation near the Minjiang fracture was done, and the stratum and its relationship with tectonic movement of klippe were analyzed. The results show that the klippen distribution and the fracture reveal good matching relationship and the klippen forming period agrees well with the fracture action period. The kilppen were controlled by tectonic movement and the rock was brought to the contemporary situation by the fracture overthrusting. The klippen were the product of tectonic movement,and the large scale overthrust accompanied by gravity gliding and capping rather than the glacier action was the main dynamics.
Key words:  Northwest Sichuan  klippe  glacier  tectonic movement  overthrust  forming mechanism