江西龙潭金矿床矿石特征及成矿阶段探讨

Discussion on ore features and metallogenic stage of Longtan gold deposit,Jiangxi Province

本文通过野外地质工作,并结合光学显微镜等测试技术,对矿床矿石特征以及成矿阶段进行了分析。龙潭金矿床已查明矿物约53种,矿石结构以结晶结构、交代结构为主,其次有固溶体分离结构、压碎结构。矿石构造主要有脉状构造、网脉状构造、浸染状构造、团块状构造、角砾状构造。自然金嵌布类型以包体金为主,次为裂隙金、晶隙金。通过分析,将成矿阶段划分为热液期与表生期,共分五个内生成矿阶段和一个表生阶段。

This paper analyzed the ore features and metallogenic stage of the deposit through field geological survey and optical microscope.About 53 kinds of minerals have been identified in Longtan gold deposit.The ore structure is mainly crystalline structure and metasomatic structure,followed by solid solution separation structure and crushing structure.Ore structures mainly include vein structure,network vein structure,disseminated structure,lumpy structure and brecciated structure.The embedding type of natural gold is mainly inclusion gold,followed by fissure gold and interstitial gold.Through analysis,the metallogenic stage is divided into hydrothermal stage and supergene stage,which is divided into five endogenetic stages and one supergene stage.