关于三江(云南段)铜金多金属找矿问题的思考

DISCUSSION ON PROSPECTING OF THE Cu-Au POLYMETALLIC DEPOSITS IN THE SANJIANG AREA,YUNNAN PROVINCE

三江（云南段）地壳是一经过多期构造运动拼接起来的地壳块体。该区构造发展史中影响较大的有印支期和喜山期构造运动。矿产的形成多与上述两期构造运动有关，尤以喜马拉雅期造山运动影响最强烈，形成的大中型矿床占比例最大。研究聚矿构造是寻找中、大型矿床的捷径。聚矿构造可划分为3种基本类型：1）以构造圈闭型为主的聚矿构造；2）以岩性层序圈闭性为主的聚矿构造；3）以岩性层序及构造圈闭性联合控制的聚矿构造。

As a massif matched during multiple tectonic movements, the Sanjiang area features Indosinian and Himalayan movements inthe tectonic evolution. The mineralization shows close relation to these two movements. Especially, Himalayan orogeny played an importantrole which were responsible were responsible for the forming of most middle or large - sized deposits. Study on ore - congregated structures serves as a feasiblemethod leading to searching for middle ore large- sized deposits. The ore - congregated structures are diveded into three types, one featuresstructurally traping,one features lithologically traping and the other features structurally and lithologically traping.