西南天山萨瓦亚尔顿金矿地质特征及矿床成因

萨瓦亚尔顿金矿床赋存于中—上石炭统含碳碎屑岩建造中,矿化受构造破碎带的控制,矿石矿物为黄铁矿、毒砂、黄铜矿等硫化物,脉石矿物为石英和方解石,金矿物以银金矿为主。通过同位素研究表明成矿物质主要来自深部较老的地层,氢、氧、碳同位素特征显示,成矿作用主要为大气降水补给的地下水渗入深部,经加热循环并溶滤围岩中的矿质,迁移到低压空间和有利岩性层中而成矿。K-Ar同位素表明其成矿时代属燕山中—晚期,甚至更新,萨瓦亚尔顿金矿床属于穆龙套型金矿床。

METALLOGENIC CHARACTERISTICS AND ORIGIN OF SAWAYARDUN GOLD DEPOSIT,SOUTHWESTERN TIANSHAN MOUNTAIN

The Sawayardun gold deposit occurs in the middle-upper Carboniferous turbidite sequence,and the mineralization is restricted by the fracture zones.The ore is composed of sulfide such as pyrite,arsenopyrite,and chalcopyrite and so on;the matrix mineral composed of quartz and calcite.The gold is found mainly in electrum.The isotopic elements show that the mineral substance is coming from the old deep strata.It could formulated a model of circulating atmospheric water becoming a hydrothermal fluid at depth,dissolving gold metals from the country rocks,and migrating to a place with lower pressure and precipitated into stratum good deposit.The mineralization date is the middleupper Yanshan epoch or later,using K-Ar method.The Sawayardun deposit is a Muruntar-type gold deposit.