香格里拉卑贡金异常特征及金矿(化)体成因

THE CHARACTERISTICS OF BEIGONG AU ANOMALY AND GENESIS OF AU ORE BODY (METALLOGENESIS) IN XIANGGELILA

由1/2.5万土壤化探测量圈出6个金异常,查证后圈定3条金矿(化)体。矿体均产于上三叠统王吃卡组二段(T3wn2)构造蚀变带中,严格受地层、构造蚀变带控制。矿床成因为构造蚀变岩型金矿床,大比例土壤化探测量在该区金矿找矿效果显著。

6 Au anomalies have been outlined according to the 1∶ 25000 soil geochemical survey.Then,3 Au ore bodies（metallogenesis） have been outlined by the investigation,which are all in Upper Triassic Wangchika Formation Member 2（T3wn2） structural alteration zone,and controlled strictly by the strata and structural alteration zone.We think that the genesis of ore deposit belongs to the Au deposit of structural alteration rock type according to the analysis.The large scale soil geochemical survey has very evident exploration effect for the Au deposit in this area.