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湘西北凤凰县民稿矿区铅锌成矿模式讨论

Journal of East China Institute of Technology(Natural Science Edition)(2015)

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Abstract
湘西北地区铅锌矿多赋存于寒武系清虚洞组与奥陶系桐梓-红花园组.湘西凤凰县民稿矿区位于著名的花垣矿田与凤凰矿田之间,通过对其控矿因素、成矿物质来源的研究,建立了成矿模式.民稿铅锌矿的赋矿层位为寒武系清虚洞组中段,岩性以条纹条带状泥-粉晶灰岩为主,在本地层单元中的Pb,Zn含量明显高于其它层位,且相同地质体在断层附近的Pb,Zn含量相对要高.成矿物质中的Pb为壳幔混合铅,S来源于海水硫酸盐,矿液自地幔沿深大断裂往上运移,经导矿断裂扩散或渗透到成矿有利部位而形成矿床.
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Key words
mineralization model,lead-zinc,Fenghuang,northwestern Hunan
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