青海南沟金矿床地质特征及找矿标志研究

Study of Geological Characteristics and Prospecting Criteria of Nangou Gold Deposit,Qinghai

南沟金矿地处昆中断裂与昆南断裂的复杂构造带中,位于昆南断裂北侧,成矿地质条件优越,通过分析南沟金矿成矿地质背景、地球化学特征及矿床特征、构造与金成矿的关系等,发现区内的矿体均赋存于叠加在韧性剪切带之上的次级脆性断裂破碎带中,并控制着金矿体的形态、产状、规模和分布。南沟金矿成因属中低温热液成因的破碎带蚀变岩型金矿床。综合分析认为,矿区成矿地质背景良好,取得了较好的找矿成果,具较好的找矿前景。

Nangou gold deposit is located in the complex structural belt of Kunzhong Fault and Kunnan Fault,it is located on the north side of Kunnan Fault,with superior geological conditions for mineralization.By analyzing the geological background,geochemical characteristics and the the relationship between deposit characteristics,structure and gold deposit,it was found that the ore bodies in the area occur in secondary brittle fracture zones superimposed on ductile shear zones,and control the shape,occurrence,scale,and distribution of the gold ore bodies.The genesis of Nangou gold deposit belongs to a fractured zone altered rock type gold deposit of medium-low temperature hydrothermal origin.Based on comprehensive analysis,it is believed that the ore-forming geological background of the mining area is good,and the better prospecting results have been achieved,with good prospecting prospects.