刘建朝, 李旭芬, 刘亚非, 汪帮耀, 米乃哲, 张雪. 2010: 胶东牟平-乳山金矿带金青顶金矿碲化物矿物的特征及沉淀机制. 地质通报, 29(9): 1319-1328.
    引用本文: 刘建朝, 李旭芬, 刘亚非, 汪帮耀, 米乃哲, 张雪. 2010: 胶东牟平-乳山金矿带金青顶金矿碲化物矿物的特征及沉淀机制. 地质通报, 29(9): 1319-1328.
    LIU Jian-chao, LI Xu-fen, LIU Ya-fei, WANG Bang-yao, MI Nai-zhe, ZHANG Xue. 2010: Mineralogical characteristics of telluride and their precipitation mechanism in the Jinqingding gold deposit, eastern Shandong, China. Geological Bulletin of China, 29(9): 1319-1328.
    Citation: LIU Jian-chao, LI Xu-fen, LIU Ya-fei, WANG Bang-yao, MI Nai-zhe, ZHANG Xue. 2010: Mineralogical characteristics of telluride and their precipitation mechanism in the Jinqingding gold deposit, eastern Shandong, China. Geological Bulletin of China, 29(9): 1319-1328.

    胶东牟平-乳山金矿带金青顶金矿碲化物矿物的特征及沉淀机制

    Mineralogical characteristics of telluride and their precipitation mechanism in the Jinqingding gold deposit, eastern Shandong, China

    • 摘要: 通过光学显微镜、电子显微镜并结合能谱分析,在金青顶金矿Ⅱ号矿脉深部除含碲化物碲银矿、碲金银矿和碲铋矿外,首次发现碲金矿的存在,进一步证实了前人对于该矿床中存在碲金矿这一新矿物的推测,也打破了该金矿深部无碲金银矿的传统认识。这些碲化物呈连生体或者细脉状产于黄铁矿等硫化物、石英与黄铁矿裂隙中。在金银碲化物矿物中,Te含量变化较小,Au含量变化较大,与Ag呈负相关,与Bi为正相关。结合金-银-碲矿物成分-共生图解,对金银碲化物矿物的共生组合特征进行了研究。研究表明,Te总是优先与Ag结合形成碲银矿或碲金银矿,只有热液中Ag被消耗后才与Au结合形成碲金矿,最后Te被耗尽,矿液中残留很多的Au,从而形成自然金,说明随着成矿过程的演化,成矿热液可能逐渐富金,具体表现为碲银矿- 碲金银矿-碲金矿-自然金的析出顺序。

       

      Abstract: Optical microscope and electron microscope analysis with EDX indicate that calaverite is first discovered in this research, in addition, there are hessite, petzite and pilsenite in the deep No.Ⅱore vein, which not only further proves previous assumption, but also defines the traditional understanding there is no petzite in the deep area. These telluride minerals appear as intergrowth or veinlet in the fractures of sulfides and quartz. The content of gold in hessite and petzite varies dramatically but tellurium has a small variation. Gold is negatively correlated with silver. In addition, Au seems to have a positive correlation with bismuth. The paragenetic association of Au-Ag tellurides in Jinqingding gold deposits has been studied based on the experimental results in Au-Ag-Te ternary system. The experiments show that Te always give priority to combine with Ag to form hessite or petzite, and Te combines with Au to form calaverite after Ag of magmatic hydrothermal consumed, there remains a lot of gold in ore solution, forming a natural gold. Gold gradually enriches in ore-forming hydrothermal with the evolution of ore-forming process, which displayed mainly precipitation order of Au-Ag telluride: hessite-petzite-calaverite-Au.

       

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