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一、引言锦屏山位于四川省凉山彝族自治州冕宁县城关以西四十余公里处。著名的锦屏山断裂带构成不同大地构造单元的分界:其西为青藏印支断块区的松潘甘孜断褶(地槽)和玉树义敦断褶(地槽),其东为扬子断块区的盐源丽江块陷。按四川省地质局第一区域地质调查大队(1974)意见,锦屏山及其邻区出露的地层,自锦屏山断裂向东依次为:中三叠统白山组(T_2b),中三叠统盐塘组(T_2y),上二叠统峨眉山玄武岩(P_2β),下二叠统(P_1),
I. Introduction Jinping Mountain is located in Mianning County, Liangshan Yi Autonomous Prefecture in Sichuan Province, 40 kilometers west of Chengguan. The famous Jinping Mountain fault zone constitutes the boundary between different tectonic units: the west is the Songpan-Ganzi fold (gutter) and the Yushu Yidun fault (gutter) in the Indosinian faulted block of the Qinghai-Tibet region, and the east is the Yangtze fault block The source of the Lijiang block Yuen. According to the opinion of the First Regional Geological Survey Brigade of Sichuan Province Bureau of Geology (1974), the strata exposed in Jinping Mountain and its adjacent areas are: Middle Triassic Baishan Formation (T_2b), Middle Triassic Yantang Formation (T_2y), Upper Permian Emeishan basalt (P_2β), Lower Permian (P_1)