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首页> 外文会议>International Congress on Earth Science, Exploration and Mining Around the Pacific Rim 10 - 13 October 1999 Bali, Indonesia >Styles of High-Sulphidation Gold, Silver and Copper Mineralisation in Porphyry and Epithermal Environments
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Styles of High-Sulphidation Gold, Silver and Copper Mineralisation in Porphyry and Epithermal Environments

机译：斑岩和超热环境中高硫化金，银和铜矿化的样式

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摘要

High-sulphidation (HS) gold, silver and/or copper deposits are generated in both the epithermal and the upper parts of the underlying prophyry environments over vertical intervals of up to 2 km. The HS deposits of the absorption of acidic magmatic volaties by voluminous groundwater systems. Mineralistation stlyes in HS systems reflect depth of formation as well as the interplay between structural. lithological and hydrothermal parameters. The deep parts of HS systems, at depths of>1000 m, are typified by disseminated copper+-gold mineralisation comprising digentie, chalcitic alteration. In highly telescoped systems, such mineralisation may overprint porphyry stocks and associated quartz-veinlet stockworks. Intermediate levels of HS systems commonly contain fault-controleld copper-gold mineralisation. typically as eargite in bodies of vuggy residual quartz, silicification and/or massive pyritic sulphide. The shallow parts of HS systems, at depths of <500 m, may host lithologically controlled disseminated mineralisation in which gold and/or silver tend to predominate over copper. Barren acid-leached zones formed in the steam-heated environment above paleo-water tables may be preserved above or alongside shallow HS deposits.
机译：高热（HS）的金，银和/或铜沉积物在长达2 km的垂直间隔内都在超热和下伏杂物环境的上部产生。大量地下水系统吸收酸性岩浆挥发物的HS沉积物。 HS系统中的矿化溶质反映了地层深度以及结构之间的相互作用。岩性和热液参数。 HS系统深部的深度大于1000 m，以弥散的铜+金矿化为特征，包括金铁矿，黄铜矿蚀变。在高望远镜系统中，这种矿化作用可能会使斑岩储层和相关的石英-小瓦储层覆盖。 HS系统的中级水平通常包含断层控制的铜金矿化层。通常作为蓬松的残留石英，硅化作用和/或块状黄铁矿硫化物中的黑ite石。在小于500 m的深度处，HS系统的浅层部分可能具有受岩性控制的弥散性矿化作用，其中金和/或银往往比铜更占优势。在古地下水位以上的蒸汽加热环境中形成的贫酸浸出带可保留在浅层HS沉积之上或旁边。

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