吉尔吉斯波尔度铅锌矿床地质特征及成因初探

Geological characteristics and genesis of the Boldu lead-zinc deposit in Kyrgyzstan

波尔度(Boordu)铅锌矿床位于吉尔吉斯北天山Aktyuz地区,本文对其矿床地质特征和控矿因素进行了总结,研究表明矿区的围岩蚀变和矿化特征整体受到NW向Boordu断裂的控制,与石英斑岩的关系密切。矿区围岩蚀变主要包括发育硅化、绢英岩化、碳酸盐化、电气石化,局部发育钾化和高级泥化,从矿区西部至东部,围岩蚀变表现出石英-碳酸盐化、黄铁绢英岩化和石英-电气石的分带特征及相应的Cu→Pb-Zn→Au的矿化分带特征。综合分析认为该矿床成因类型为受构造控制的岩浆热液型矿床。

The Boordu lead-zinc deposit is located in Aktyuz area of northern Tianshan in Kyrgyzstan,this paper summarizes the geological characteristics and the ore controlling factors of the deposit,the study shows that the wall rock alteration and mineralization characteristics are controlled by the NW trending Boordu Fault as a whole,and are genetic with the quartz porphyry.The wall rock alteration in the mining area mainly includes silicification,sericitization,carbonation,and electrification,with locally developed potassium mineralization and advanced argillization,from the west to the east of the mining area,wall rock alteration shows zoning characteristics of quartz-carbonatization,pyrite-sericitization and quartztourmaline,and corresponding mineralization zoning characteristics of Cu→Pb-Zn→Au.According to comprehensive analysis,the genetic type of the deposit is magmatic hydrothermal deposits controlled by structure.