黄金科学技术 ›› 2019, Vol. 27 ›› Issue (1): 15-24.doi: 10.11872/j.issn.1005-2518.2019.01.015
• • 下一篇
罗清威1,2,王保国1,义爱文1,张克川1,潘泽1,张盛亚1
Qingwei LUO1,2,Baoguo WANG1,Aiwen YI1,Kechuan ZHANG1,Ze PAN1,Shengya ZHANG1
摘要:
黄铁矿是金矿床中主要的贯通性载金矿物,通过对坦桑尼亚某绿岩带型金矿床中黄铁矿的形态、化学组成和物理性质等标型特征进行详细研究,能够从某种程度上识别出含金矿体,对野外勘查工作具有重要指导意义。通过野外地质观察和室内分析对绿岩带型金矿床中的黄铁矿标型特征进行了详细研究,结果表明:该矿床中黄铁矿呈浅黄—黄色,以细粒为主,具有半自形和碎裂结构的黄铁矿含金性最好;主矿体即金矿化强烈区域黄铁矿晶形以五角十二面体和五角十二面体与其他单形的聚形为主。主成矿阶段的黄铁矿主量元素整体表现出亏S、富Fe的特点,而微量元素富As、Sb,表明形成了载金能力较好的P型黄铁矿;主矿体附近黄铁矿的热电性主要表现为P型黄铁矿,表明该含金矿脉剥蚀程度总体较低,且目前揭露的仅为矿脉浅部,向深部矿脉仍有较大的延伸,由此推断该矿床深部具有良好的找矿前景。
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