| 试论贵州水银洞金矿床中胶状黄铁矿的含金性 |
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| 引用本文：.2007.A tentative discussion on gold potential of pyrogelite in Shuiyindong gold deposit, Guizhou Province[J].Mineral Deposits,26(6):643~650 |
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| 中文摘要:贵州省贞丰县水银洞金矿是近几年发现的大型_特大型规模的微细粒浸染型金矿床。以往的研究中强调了黄铁矿与金的密切关系，但实践中发现并不是矿床中所有黄铁矿都含金。为了弄清黄铁矿含金性的规律，作者采集了不同品位、不同部位（矿体、顶底板及顶底板中的脉）的样品进行了详细的矿相学岩石学研究，结合电子探针、化学分析结果，同时参考了前人关于黄铁矿标型特征的研究及黔西南微细浸染型金矿的研究成果，认为本矿区黄铁矿具有多样性，而富含有机质的低温热液阶段形成的胶状黄铁矿和五角十二面体黄铁矿是矿区最重要的载金黄铁矿。含金胶状黄铁矿具有球状外形、环形收缩裂纹和龟裂纹等可识别的标志。金就富集在胶状黄铁矿及少量五角十二面体黄铁矿的外圈环带中，即富砷的外带部位，并与低硬度区相吻合。 |
| 中文关键词:地质学 胶状黄铁矿 水银洞金矿 贵州贞丰 |
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| A tentative discussion on gold potential of pyrogelite in Shuiyindong gold deposit, Guizhou Province |
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| Abstract:The Shuiyindong gold mine discovered in recent years in Zhenfeng Country of Southwest Guizhou is a large or superlarge dissemination type gold deposit. Gold minerals in this deposit are closely related to pyrite. Genetic mineralogical studies of pyrites from this mine show that pyrites have four genetic types, namely, syngenetic mechanical sedimentation, syngenetic chemical sedimentation, sedimentation contemporaneous with rocks, and epithermal origin. The epithermal pyrite is the main mineral associated with gold. Epithermal pyrogelite and altered epithermal pyrogelite are most important auriferous minerals of the epithermal epoch. Auriferous pyrogelite is characterized by such obvious marks as spherical shape, ringed shrinkage cracks and tortoise shell cracks. Gold is concentrated in outer rings of pyrogelite and minor pentagonal dodecahedral pyrite, i.e., the As_rich outer zones, which are consistent with the As_rich and low hardness areas. |
| keywords:geology, pyrogelite, Shuiyindong gold mine, Zhenfeng in Guizhou |
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