滇东南微细浸染型金矿构造控矿型式

滇东南微细浸染型金矿的形成与该区构造关系密切,总体受右江裂谷系控制。主干断裂严格控制金矿的带状分布,次级断裂进一步控制成矿带内矿体的具体空间位置或定位。认为逆冲推覆构造为该区微细浸染型金矿的控矿构造型式,归纳出该区微细浸染型金矿在构造中的分布规律,并据此提出新的找矿思路与找矿方向。

THE STRUCTURAL ORE-CONTROL PATTERN OF MICRODISSEMINATED AU DEPOSIT IN SOUTHEAST YUNNAN

The southeast Yunnan area is the southwest part of the Dian-Qian-Gui "Au Triangle".The formation of microdisseminated Au deposit in this area is in close relation to the structure of this area.The distribution of Au deposit is controlled generally by the Youjiang rift system.The main fault in this area strictly controls the zonal distribution of Au deposit.And the subordinate fault of the main fault controls the specific position or emplacement of orebody in the metallogenetic zone still further.In this paper,according to the analysis on the relationship between the ore-control structure characteristics of microdisseminated Au deposit and the occurrence position of Au orebody in this area,we believe that the ore-control structure pattern of microdisseminated Au deposit in this area is the thrusting nappe structure,reduce preliminarily the distribution rule of microdisseminated Au deposit in this area in the structure and then put forward the new ore-prospecting idea and direction.