| 湖北铜绿山矽卡岩型铜铁矿床中隐爆角砾岩型金（铜）矿体的发现及其找矿前景 |
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| 引用本文：.2005.Discovery of cryptoexplosive breccia type Cu (_Au) orebodies in Tonglushan skarn_type Cu_Fe deposit of Hubei Province and ore_searching vista[J].Mineral Deposits,24(5):527~536 |
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| 基金项目:国家自然科学基金（编号：40072032） |
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| 中文摘要:经研究确认鄂东南铜绿山矿床为隐爆角砾岩型金（铜）矿。这一新类型的金（铜）矿体受NWW向断裂、隐爆角砾岩带、接触带复合构造的控制，产于矽卡岩型矿体上盘大理岩残留体的边部，走向上大致与NNE向矽卡岩型主矿带垂直。矿石呈角砾状构造，角砾成分为大理岩、斜长石岩，含少量块状磁铁矿矿石角砾和高岭石化花岗岩角砾。胶结物主要为细碎屑物及微细粒状石英、玉髓、高岭石、黄铜矿和黄铁矿等中低温热液矿物。矿石平均wCu 2.54％，wAu 3.44×10-6。隐爆角砾岩型矿化是在岩浆侵入作用下成矿热液演化晚期阶段形成的，时间上晚于矽卡岩型，但可叠加其上，常形成富铜金矿体，也可形成独立金矿体。隐爆角砾岩型金（铜）矿体的发现为大幅度增加铜绿山矿床的储量指明了方向，对认识铜绿山矿田的成矿系列具有重要意义。 |
| 中文关键词:地质学 隐爆角砾岩 矽卡岩 铜铁矿 铜金矿 铜绿山 |
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| Discovery of cryptoexplosive breccia type Cu (_Au) orebodies in Tonglushan skarn_type Cu_Fe deposit of Hubei Province and ore_searching vista |
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| Abstract:The Tonglushan deposit in southeastern Hubei Province is a large_size skarn type Cu_Fe deposit. Cryptoexplosive breccia type Cu_Au orebodies were recently found in this deposit. The new orebodies are frequently controlled by NWW_striking compound structure comprising fault_cryptoexplosive breccia belt_contact zone along the southern and the northern boundary of the marble residue in the upper plate of the skarn type orebodies. In the steeply_dipping vein form, the orebodies are nearly vertical to the NWW_striking skarn type ore belt. Ores are of brecciated structure, with breccia being mainly marble and plagioclase rocks. There are also some massive magnetite ores and kaolinites. Cements are mainly fine fragments and medium_low temperature hydrothermal minerals, such as quartz, chalcedony, kaolinite, chalcopyrite and pyrite. The average copper and gold contents in ores are 2.54×10-2 and 3.44×10-6, respectively. Cryptoexplosive breccia type Cu_Au orebodies were formed at the late evolutionary stage of ore_forming fluids. They were formed later than and often superimposed on skarn type Cu_Fe orebodies. Therefore, rich Cu_Au orebodies as well as independent Au orebodies were formed. The discovery of cryptoexplosive breccia type Cu_Au orebodies contributes greatly to increasing the reserves of the Tonglushan deposit and to studying its metallogenic system. |
| keywords:geology, cryptoexplosive breccia, skarn, Cu_Fe ore_body, Cu_Au ore_body, Tonglushan |
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