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一、问题的提出巴颜喀拉—松潘地区(以下简称巴松地区)奇特的大地构造格局大致呈三角形展布, 而被北秦岭、金沙江和龙门山—康滇地轴三大断裂带所围限。北部的同德地区(包括共和盆地等)为三角区向北突出的部分。从北往南,巴松地区及其南北缘分布着以深断裂为界、不同时代的“狭条”:怀头他拉—青海南山三叠系狭条,布尔汗布达山三叠系狭条, 布青山—积石山晚古生界狭条,雅合拉达合泽山北侧—玛多北—甘德北二叠系狭条,雅合拉达合泽山南侧二叠系狭条,玉树—甘孜晚古生界狭条,二道沟—江达三叠系狭条等。
I. PROBLEM PROBLEMS The peculiar tectonic structure of the Bayan Har-Songpan region (hereinafter referred to as the Bassong region) is roughly triangular in shape and is surrounded by three major fault zones of the North Qinling, Jinshajiang and Longmenshan-Kangndian axis . The northern part of the Tongde area (including the Republican Basin, etc.) is a part of the Triangle highlighted northward. From north to south, the Baxong area and its north and south edges are distributed with deep faults as the boundary and the “strips” of different times: Huai Tanta - Qinghai Nanshan Triassic series, Burhan Bundan Triassic series Article, Buqingshan - Jishan Mountain Late Palaeozoic narrow strip, Yahelada North side of Heze Mountain - Maduo North - Gander North Permian narrow strip, Yahelada South of Heze Mountain Permian narrow Yushu-Garze Late Paleozoic, Erdaogou-Jiangda Triassic, etc.