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扬子断块区西南缘系指西昌、凉山、滇东一带,大体包括大家所熟知的康滇地轴及其两侧拗陷。本文论述东经101°—103°,北纬26°—29°范围内断块构造轮廓。一.断块构造的基本轮廓我们认为本区基本大地构造轮廓是由各级块体和块间线性构造接合带镶嵌而成的断块构造。根据深部结构、盖层的沉积建造、岩相、厚度、构造形变和岩浆活动的差异,将本区划
The southwestern margin of the Yangtze fault block refers to the Xichang, Liangshan and East Yunnan areas, generally including the well-known axis of Kangdi and its depression on both sides. This paper discusses the fault structure contours within 101 ° -103 ° E and 26 ° -29 ° N. I. Basic Outline of Fault Block Structure In our opinion, the basic tectonic contour of this area is a fault block structure inlaid by a linear structural joint band between blocks and blocks. According to the deep structure, the caprock of sedimentary construction, lithofacies, thickness, tectonic deformation and magmatism,