云南元阳大坪金矿铅同位素化探评价

通过对云南元阳大坪金矿某切穿矿脉剖面、不同海拔高程矿脉的矿石和围岩的铅同位素组成分析，采用铅同位素系统剖面化探方法对大坪金矿进行了化探评价和隐伏矿的预测分析，指出大坪金矿已进入主矿体的中心部位，深部隐伏矿潜力不大，找矿战略应以扩大横向为主。金矿化与闪长岩铅同位素组成的一致性，表明金矿化受闪长岩的控制。

The Application of Lead Isotopes to Geochemical Exploration in the Daping Gold Deposit, Yunnan Province

A new method for lead isotopic exploration intersecting the mineralization zones was applied to the exploration and evaluation in the Daping gold deposit, Yuanyang, Yunnan Province. The analytical results of the ores and adjacent rocks from the veinscrossing sections at different altitudes show that there are almost no anomalies in the deposit. The prognostic results show that the exposed orebody in the Daping gold deposit is located in the middle-lower part of the major orebody. It is suggested that the lateral exploration surrounding the known deposit should be extended. The comparable lead isotope data between the ores and the diorites indicate that gold mineralization is likely to be controlled by the diorites.