| 湖北蛇屋山金矿区风化型金矿床地质特征及成因浅析 |
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| 引用本文：.1994.Geological characteristics and genesis of the weathering type gold deposit in the Shewushan gold ore district, Hubei province[J].Mineral Deposits,13(1):28~37 |
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| 中文摘要:湖北嘉鱼蛇屋山金矿区风化型金矿床，矿体赋存于松散粘土层中，含不等量砾砂的粘
土为含矿寄主岩。矿体呈似层状，产状平缓呈平卧状态。矿床规模大，长约l300m，宽约350m，面积达0.5km2，矿体厚1.2～41.2m，Au品位（1.1～7.6）×l0-6。矿石氧化程度高，金主要呈游离态次显微金形式存在。成矿控制因素主要受基岩岩性、地质构造环境和松散层性质。成矿物质主要来源于矿化原岩及下伏或附近基岩中的原生金矿体、具金矿化或金异常的含金地质体。矿床形成是表生风（红土）化作用的结果，为风化残积成因红土型金矿床。 |
| 中文关键词:风化残积 岩溶洼地 红土型金矿床 游离金 蛇屋山 |
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| Geological characteristics and genesis of the weathering type gold deposit in the Shewushan gold ore district, Hubei province |
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| Abstract:In the weathering type gold deposit within the Shewushan gold ore District, orebodies Occur in the loose clay bed, with the clay that contains different amounts of gravel and sand serving as the host rock. The orebodies are stratoid and assume flat-lying form. The ore deposit is large in size:
some 1300 m in length, about 350 m in width, and 0.5 km2 in area. The orebodies are 1.2～41.2 m in thickness，with Au grade being(1.7～7.6)×10-6. Ores have been highly oxidized, and gold is mainly present as free submicroscopic gold. Factors controlling the ore-forming process mainly include lithology of bedrocks, geological-structural environment and properties of the loose bed.
Ore-forming materials are derived chiefly from the mineralized protolith, underlying primary gold orebodies or primary gold orebodies in the nearby bed rock, and auriferous geological bodies with gold mineralization or gold anomalies. The ore deposit has been formed as a result of supergene weathering(1aterization), thus being a lateritic gold deposit of weathering-residual genesis. |
| keywords:weathering residue, karst depression, lateritic gold deposit, free gold, Shewushan
Abstract |
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