云南中西部地洼构造系沉积建造与含矿建造

本文将云南中西部三个中新生代地洼盆地区,划归为一个地洼构造系,它们是在一个统一的顺时针旋转构造应力场作用下形成的。地洼构造系经历了初动期(印支早期),激烈期(印支晚期至燕山期)及余动期(喜马拉雅期)三个演化阶段。不同演化阶段性质的差异,导致不同构造层中沉积建造与含矿建造的明显不同,尤其以地洼激烈期的蒸发岩(含盐)建造与层控多金属矿床的相伴产出为特征。根据综合分析,指出了区内上述矿床的找矿方向

THE SEDIMENTARY AND ORE-BEARING FORMATIONS IN THE YUNNAN DIWA (GEODEPRESSION) TECTONIC SYSTEM, CENTRAL-SOUTH CHINA

This paper merges the three Mesozoic-Cenozoic basin regions of Yunnan into a diwa tectonic system, considering that the diwa tectonic system was originated from a clockwise rotating tectonic stress field.The three development stages of the diwa tectonic system, i. e. the initial- (lower Indosinian period), maximum- (upper Indosinian and Yanshanian period), and residual-mobility (Xishanian period), proceeded in devorse movement status, leading to difference of the sedimentary and ore-bearing formations in diverse structural layers, Characterstte in especial is that the evaporite formations and stratabound ore deposits are generated together. According to synthetical analysis of tectonic movement and mineralization, guides to the search for salt and stratabound metalliferous deposits have been suggested.