镇沅县大地山金矿区土壤地球化学特征及找矿前景  

THE GEOCHEMICAL FEATURE AND PROSPECTING POTENTIALITY OF DADISHAN AU OREFIELD IN ZHENYUAN

作　　者：陈希[1] 王莹 李维忠[1] 洪瑞岐 CHEN Xi;WANG Ying;LI Wei-zhong;HONG Rui-qi(Yunnan Exploration institute of Geology&Mineral Resources,Kunming 650051)

机构地区：[1]云南省地质矿产勘查院,云南昆明650051

出　　处：《云南地质》2020年第3期395-402,共8页Yunnan Geology

摘　　要：通过对云南镇沅县大地山金矿区1∶2.5万土壤地球化学测量,Au、As、Sb、Cu、Pb、Zn、Ag表现出明显异常,且主成矿元素Au异常强度高,规模大,并具明显的浓集中心和三级浓度分带;异常区内见上三叠统小定西组(T3xd)基性火山岩、花岗斑岩侵入岩体及发育的构造破碎带.从化探异常和地质特征看,该矿区具有寻找岩浆热液型的金铜多金属矿矿床潜力.According to 1:25000 soil geochemical survey of Dadi Au orefield in Zhenyuan,Yunnan,there are very clear Au,As,Sb,Cu,Pb,Zn,Ag anomalies,and the principal metallogenesis element Au intensity very high,in large scale,concentration center clear and with 3-order concentration zonation.In the anomaly area,there is the Upper Triassic Xiaodingxi Formation(T2xd) basic volcanic rock,granite intrusion and the developed fracture zone.According to the geochemical anomaly and the geological feature,there is the potentiality in the prospecting for hydrothermal Au-Cu multimetallic deposit.

关 键 词：地球化学特征 成矿条件 找矿前景 云南镇沅大地山 

分 类 号：P595[天文地球—地球化学]