| 铜陵矿集区块状硫化物矿床地质特征 |
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| 引用本文：.2004.Geological Characteristics of Massive Sulfide Deposits in Tongling Ore Concentration Area, Anhui Province[J].Mineral Deposits,23(3):327~333 |
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| 基金项目:国土资源部科技专项研究项目“大型矿集区三维蚀变填图与流体示踪研究”(B0002_3)和国家自然科学基金重点项目(40234051) |
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| 中文摘要:蚀变_流体填图揭示，铜陵地区石炭系黄龙组喷流沉积含矿岩系中普遍 存在块状硫化物矿床，上部为层状块状硫化物矿层，下部为浸染状、细脉_网脉状硫化物矿 体，具有典型的双层结构。自下而上矿石具有垂直分带性：硅质矿石、石膏矿石、黄铁矿矿 石、黄铁矿_重晶石矿石和菱铁矿_铁质燧石矿石。矿石发育胶状和莓球结构，微细层纹状_ 马尾丝构造。矿石成分以黄铁矿和菱铁矿为主。矿床发育一套独特的热液气爆角砾岩不规则 网脉和相互连通的虫管状_树枝状_姜块状黄铁矿管道系统，矿化形式为弥散式多喷口席状矿 化，厚度一般不超过100 m。 |
| 中文关键词:地质学 喷流沉积 块状硫化物 热液气爆角砾岩 铜陵矿集区 |
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| Geological Characteristics of Massive Sulfide Deposits in Tongling Ore Concentration Area, Anhui Province |
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| Abstract:The alteration and fluid mapping show that pyrite_type massive sulfide deposits widely occur within Carboniferous sedimentary_exhalative ore_bearing rocks of th e Huanglong Formation. The deposit, characterized by a representative two_layer texture, consists of the exhalation phase massive stratiform ore bed in the uppe r part and the feeder channelway phase disseminated_stockwork orebody in the low er part. It has distinct vertical metallic zoning in the upward order of siliceo us, gypsum, pyrite, pyrite_barite and siderite_siliceous ores. Colloform, frambo idal textures and laminated, brecciated structures of exhalation are widely deve loped in the stratiform ores. Ores are dominated by pyrite and siderite. The dep osit shows a well_developed characteristic exhalation pipeline system, which inc ludes irregular stockworks of hydrothermal explosion breccia, breccia pipes and interconnected worm_pipes, and branch_like and ginger_like pyrite pipes. The dis persed multi_spout sheets or blanket_like alteration and mineralization zones ar e distributed regionally and the massive mineralization occurs locally. As a rol e, the sheet alteration and mineralization zones do not exceed 100 m in thicknes s. |
| keywords:geology, exhalative sedimentation, massive sulfide deposit, hydrothermal explosion breccia, Tongling ore concentration area |
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