云南播卡新山金矿构造特征及其成因响应

云南东川地区播卡新山金矿成因一直以来争议不断,而矿床成因是实现找矿的前提,由于对区内金矿成因认识模糊,实际找矿工作效果并不理想。运用统计学方法对矿区构造进行统计剖析,并结合区域构造演化规律及典型构造特征进行分期,对成矿期及成矿后构造应力场进行恢复,结果表明区内构造应力场及构造性质在成矿期与成矿后有很大的转变。成矿作用发生于印支—燕山早期,受印支—早燕山运动影响以及持续递进变形作用,主断裂派生的里德尔剪切带提供了良好的含金热液运移通道及金矿就位空间,喜马拉雅运动仅对区内金矿体进行了动力变质改造。

Study on the Structural Feature and Genetic Response of Xinshan Gold Deposit in Boka Area,Yunnan Province

The genetic of Boka gold deposit in Dongchuan area of Yunnan Province has always been contro-versial,the genesis of the deposit is the premise to realizing the prospecting,and because the genesis of Xinshan gold deposit is fuzzy,the progress of actual prospecting work in the area is unsatisfactory.To census and analyse the structure of this area by using statistical method,combined with the tectonic evolution of this area and the typical structural characteristics to divided stage,the analysis of geological structures in this area and the return of structural stress field during and post mineralization shows that the tectonic field stress and the nature of geotectonics in this area experienced great changes during that time.The mineralization occurred from Indochina to early Yanshan Period.The Riedel Shear zones derived from the main fault provided good road for gold-bearing thermal flow and space for the distribution of gold deposits that benefited from the movements and the progressive formation during that time.Himalayan movement only made the gold orebody in this area experienced dynamic metamorphism.