青海柴北缘青山金矿综合找矿方法研究

Comprehensive prospecting method in the Qingshan gold deposit,northern Qaidam in Qinghai Province

以地质找矿理论为引领,综合运用遥感地质、地球化学测量、地球物理测量等工作手段,结合野外地质工作和室内研究,在柴北缘滩间山金矿田青山地区,取得了良好的找矿效果。青山金矿床属构造蚀变岩型。其主要含矿地段是受构造-热液控制的达肯大坂群石英片岩。矿带主要为一系列近东西向展布的脉状矿体构成。主要矿化蚀变为绿泥石化、碳酸盐化、硅化、绢云母化和黄铁矿化。遥感确定了工作区的基本地层-构造格架;地球化学测量圈定了找矿异常和锁定了找矿靶区,并显示出中低温金多金属成矿特征;地球物理测量进一步确定矿带的范围和深部延伸共圈定金铅矿体22条。青山金矿的找矿勘查实践证明,地质-遥感-地球化学-地球物理综合找矿方法对于寻找构造蚀变岩型金矿是行之有效的。

Guided by the theory of geological prospecting,comprehensive using remote sensing geology,geochemical survey and geophysical survey,combined with field geological work and research work,good prospecting result has been received recent years in the Qingshan area,the Tanjianshan gold mine of northern qaidam in Qinghai. The Qingshan gold deposit belongs to structural altered rock type gold deposit. Its mainly Ore-body is in the Dakandaban Group quartz schist which is controlled by structure-hydrothermal. The ore belt is mainly composed of a series of vein-like ore bodies with nearly East-West distribution. The main mineralization alterations are chloritization,carbonation,silicification,sericitization and pyritization. The basicstratigraphic-tectonic framework of the working area has been determined by remote sensing geological work. Geochemical survey has delineated the anomaly of prospecting and locked the target area of prospecting,showing the characteristics of low-medium temperature gold polymetallic mineralization. Geophysical surveys further determine the extent and deep extension of the ore belt. The prospecting practice of Qingshan gold deposit has proved that the comprehensive prospecting method of geology,remote sensing,geochemistry and geophysics is effective for the prospecting of this kind of structural altered rock type gold deposit.