广西龙头山金矿床矿石显微结构构造和金矿物成分特征

广西龙头山金矿床是热液型金矿床,运用扫描电子显微镜对其矿石的微裂隙特征、结构构造及成分进行分析。其结果表明,矿石的微裂隙是相通的;矿液在运移过程中,在相对封闭、酸碱度较适宜的条件下沉淀,形成了较自形的电气石、黄铁矿和金矿物;矿液经过了多期上升过程,对早期形成的矿物不断地进行叠加和改造,使不同期次形成的金矿物成分略有不同;金矿物有次生加大现象。进而认为,该金矿床应有三期以上的成矿期。

The ore microstructure and gold mineral characteristics of the Longtoushan gold deposit,Guangxi

The Longtoushan gold deposite of Guangxi is a thermal type gold deposit,Scanning Electron Microscope(SEM) has been used in research on ore micro fissuring characteristics,texture and composition,and the research shows that the ore micro fissuring is connected,the ore liquid deposited in relatively closed,and suitable acid and alkali environment during its ascending process,so the formed tourmaline,pyrite and gold mineral are relatively idiomorphic.The ore liquid ascended several times,the later minerals superimposed and transformed the former ones,the gold mineral compositions which form in different deposition periods are different,the gold minerals have been enlarged and there must be more than three mineralization periods.