| 铧厂沟金矿床地质特征及控矿冈素分析 |
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| 引用本文：.2000.Geological characteristics and ore-controlling factors of the Huachanggou gold deposit[J].Mineral Deposits,19(2):138~146 |
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| 基金项目:陕西省黄金管理局科研项目（98-01） |
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| 中文摘要:铧厂沟金矿床位于勉-略-宁三角地带成矿有利部位。矿区出露中下泥盆统三河口群和中上元古界碧口群。矿床内发育的韧性剪切带经历了右行（韧性）左行（韧脆性）右行（脆性）多期（次）活动。矿化受透镜状细碧岩控制，分布于韧性剪切带之中。矿体蚀变强烈，新生矿物定向排列，脉体中矿物具亚颗粒、变形纹、变形条带等粒内变形特征。同位素地球化学及稀土分析结果表明，基性火山岩是金的矿源层。金矿的形成富集与韧性剪切带多期（次）活动密切相关，尤其是韧脆性变形期。因此，该矿床可称之为剪切带蚀变岩型金矿床，具有一定的找矿潜力。除了蚀变细碧岩型等矿石类型之外。还应在韧一脆性控矿剪切带内注意寻找蚀变钙质糜棱岩型和硅化石英粗糜棱岩型金矿石。 |
| 中文关键词:金矿床，细碧岩韧性剪切带控矿因素，陕西铧厂沟 |
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| Geological characteristics and ore-controlling factors of the Huachanggou gold deposit |
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| Abstract:The Huachanggou gold deposit is located in the favorable ore-forming sectors of the Mian-Lue-Ning triangular area. There are Middle-Lowe r Devonian Sanhuokou Group and Middle-Upper Proterozoic Bikou Group in the ore district. The ductile shear zones which underwent multiple activities from right-handed ( ductile) to left-handed ( ductile-brittle) and right-handed (brittle) movement are developed in the gold deposit. The mineralized zone is controlled by some spilitelens distributed in the ductile shear zone. Ore-bodies have been intensely altered, and new minerals are orientationally arranged. Characteristics of plastic deformation of stress minerals in veins, such as subgrain tectonics, deformation, lamellae and deformation bands, can be found. Isotopic analyses and REE patterns indicate that the basic volcanic rock is the gold source bed. The altered calcic mylonitic and silicified quartz coarse mylonitic gold ores can be found in addition to the altered spilite gold ores in the ductile-brittle ore-controlling shear zones of this deposit. |
| keywords:gold deposit, spilite, ductile shear zone, ore-controlling factors, Huachanggou |
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