青海大水沟金矿地质特征及找矿前景分析

青海省大水沟地区花岗闪长岩和闪长岩中发现了较好的金矿化,金矿体赋存于NW-NWW向破碎蚀变带中,严格受破碎蚀变带控制。该矿点是东昆仑地区继五龙沟、阿斯哈两矿床之后发现的又一个产于中酸性岩体中的金矿床,以往的矿产勘查工作对该成矿类型未引起足够的重视。研究认为,东昆仑地区中酸性岩体发育地段,同时套合有较好的金异常及破碎蚀变的地段都有较好的金矿找矿前景,应在今后的矿产勘查工作中引起足够的重视。

Geological Characteristics and Prospecting Potential of Dashuigou Gold Depo-sit in Qinghai Province

A well developed gold mineralization is discovered in granodiorite and diorite in Dashuigou area,Golmud,Qinghai Province.The gold orebody,which has a good prospecting potential,occurs in NW-NWW fractured alteration zone and is strictly controlled by the zone.The method of exploration in this area：do research on the abnormal form of Au,the stream sediment of 1∶5 000→ find fractured alteration zones in Au anomalies→layout the geochemical profile of 1 ∶2 000 of cataclastic rock to study its ore-bearing potential →depoly the costeaning engineering to conduct the surface revealed→arrange the drilling engineering to control the deep. This mineral occurrence is another one of areas where gold orebody is discovered in the neutral-acidic rock mass after Wulonggou and Asiha deposits in East Kunlun.Development areas of neutral-acidic rock mass in East Kunlun combined well developed Au anomalies and fractured alteration zones all possess good prospecting potential of gold ore due to the lack of attention that former mineral exploration paid to this metallogenic type.Therefore,this kind of mineral exploration work shall be attached great importance in the future.