甘肃省阿克塞县中黑山金矿地质特征及成因探讨

Geological Characteristics and Genesis of Zhongheishan Gold Deposit in Aksai County,Gansu Province

勘查区位于南祁连金、铅、锌、铜、镍、钨、铬成矿带上,区域矿产较丰富,成矿条件良好。区内1:5万水系沉积物测量显示,金异常Au具内、中、外带,异常强度高、规模大、浓集中心明显,成矿潜力较大。已发现的金矿体主要赋存于构造破碎带、蚀变长石石英砂岩、中细粒砂岩、石英片岩中,矿化蚀变主要为褐铁矿化、硅化、碳酸盐化、黄铁矿化、局部硅孔雀石化。矿石金的赋存状态以硫化物包裹金及裸露半裸露金为主,其次为石英、硅酸盐包裹金。

The exploration area is located on the gold,lead,zinc,copper,nickel,tungsten,and chromium metallogenic belts in the southern Qilian.The regional mineral resources are rich and the metallogenic conditions are good.The measurement of 1:50,000 water sediments in the area shows that the Au anomaly has inner,middle,and outer belts,with high anomaly intensity,large scale,obvious concentration center,and great mineralization potential.The discovered gold ore bodies are mainly found in tectonic fracture zones,altered feldspar quartz sandstone,medium-fine-grained sandstone,and quartz schist.The mineralization alterations are mainly limonite mineralization,silicification,carbonate,and yellow iron.Mineralized,partially malachite.The occurrence state of ore gold is mainly sulfide-coated gold and bare semi-exposed gold,followed by quartz and silicate-coated gold.