滇中中晚元古代铜铁矿带成矿规律与找矿

滇中元古代铜铁矿带集中分佈东川、武定、易门、元江等多个大、中型矿床。中、晚元古代昆阳古陆间裂谷,在演化过程中发生火山喷流沉积、热水沉积、蒸发成岩、炭泥质吸附、热液改造和碎屑堆积等成矿作用,形成"四楼一梯"的裂谷成矿系列和矿床组合模式。深入分析"裂、火、构、盆、层、相"等成矿条件确定远景区,找矿方法应重视基础、分析差异、综合找矿。

THE METALLOGENETIC RULE AND PROSPECTING OF MIDDLE PROTEROZOIC CU- FE METALLOGENETIC ZONE IN CENTRAL YUNNAN

There are many large and middle scale ore deposits in central Yunnan Proterozoic Cu - Fe metallo- genetic zone of Dongchuan, Wuding, Yimen and Yuanjiang, etc. The regional geological setting of them is the rift between Middle, Late Proterozoic oldlands. In the evolution, it has experienced the metallogenesis of volcanic effusion sedimentation, hydrothermal sedimentation, evaporation diagenesis, carbon - mud adsorption, hydro- thermal reformation and clast accumulation, etc, which form the rift metallogenesis series and assemblage model of ＂4 stories and 1 stairs＂. In the ore prospecting, we must have a profound analysis of the metallogenetic conditions of ＂rift, volcanic, structural, basin, horizon, facies＂, etc in order to determine the prospective area, ore pros- pecting method and pay attention to the foundation, difference analysis and comprehensive prospecting.