| 周友清.福建紫金山矿区金矿床次生富集规律初探[J].贵州地质,2015,32(2):119-125 |
| 福建紫金山矿区金矿床次生富集规律初探 |
| Primary Discussion of Au Secondary Enrichment Regularity in Zhijinshan Deposit |
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| DOI： |
| 中文关键词: 紫金山矿区 氧化特征 次生富集 金矿 |
| 英文关键词:Zijinshan mining area Oxidation characteristics Secondary enrichment Gold deposit |
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| 中文摘要: |
| 紫金山铜金矿属高硫化浅成低温热液型铜金矿共生矿床。金矿体赋存于氧化带中，为原生含金金属硫化物矿床经表生作用所形成的次生富集金矿床。金矿体容矿岩石和赋矿围岩基本一致，主要是中细粒花岗岩，其次是隐爆角砾岩和英安玢岩。然而金矿床仅在隐爆角砾岩和英安玢岩呈脉状似“蟹脚”出露地表区域富集成工业矿体。带着这一疑惑，作者借助在紫金山矿区工作的优势，通过对紫金山铜金矿区金矿床空间形态分布特征、隐爆相、次火山岩相、断裂构造、金属硫化物氧化特征等的分析研究，提出了紫金山铜金矿金矿床次生富集规律与紫金山火山机构隐爆相隐爆角砾岩和次火山岩相英安玢岩是否侵入地表以及出露地表的形态特征极为密切的肤浅认识。 |
| 英文摘要: |
| Zijinshan Cu-Au deposit bears high-sulphur low temperature shallow-seated hydrothermal feature. The gold ore body occurs in oxidation zone, it is secondary-enrichment gold deposit which is formed by hypergenesis in the primary gold-riched sulfide deposit. The main composition of the host rocks and wall rocks in Zijinshan Cu-Au deposit is the middle-fine grained granit, the second is the concealed explosion breccia and dacite porphyry. The concealed explosion breccia and dacite porphyry outcrop on the surface spread the northwest and southeast of Zijinshan volcanic pipe like a crab. The gold ore body only enriches where the concealed explosion breccia and dacite porphyry occurs. After studying the spatial distribution form of the gold ore deposit, Zijinshan volcanic apparatus and the oxidation characteristics of metal sulfide in Zijinshan Cu-Au deposit comparatively. In this paper, it puts forward the perspective that there are close relations between secondary-enrichment rule in Zijinshan Cu-Au deposit and the morphological characteristics of cryptoexplosive breccia and dacite-porphyrite formed after intruding into or crop out the earth’s surface. |
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