| 辽三小佟家堡子金矿岩石地球化学及成矿条件研究 |
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| 引用本文：.1998.Petrological geochemistry and ore-forming conditions of the Xiaotngjiapuzi gold deposit in eastern Liaoning[J].Mineral Deposits,17(4):289~296 |
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| 中文摘要:辽东小佟家堡子金矿为隐伏的大型微细浸染型金矿。矿体寄主岩石以变粒岩为主，次为大理岩、云母片岩。不同类型容矿岩石对比研究表明，具有良好渗透性，同时又是成矿溶液物理障和化学障的岩石是细脉浸染状矿床的最有利容矿岩石。围岩与矿石的地球化学特征综合研究反映了成矿溶液早期为氧化、偏酸性，晚期逐渐变为还原、偏碱性。矿化元素组合、矿化过程微量元素变化特征以及成矿溶液的演化等表明该矿床为浅成低温热液成矿。 |
| 中文关键词:小佟家堡子金矿，微细粒浸染型，岩石地球化学，成矿溶液，辽东 |
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| Petrological geochemistry and ore-forming conditions of the Xiaotngjiapuzi gold deposit in eastern Liaoning |
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| Abstract:Located in eastern Liaoning Province, the Xiaotongjiapuzi deposit is a large concealed disseminated gold deposit discovered by the No.103 Geological Party of China National Nonferrous Metals Industry Corporation through drilling in 1993. The orebodies, occurring in lens or bed-like shape, are strictly confined to the intermediate zone btween mica schist and marble of Early Proterozoic I.iaohe Group, hosted mainly by fine-grained granulite and subordinately by marble, mica schist and lamprophyre. The gold deposit has low sulfides (about 2~5wt%) , and gold is mainly concentrated in arsenopyrite. Wall alterations include sericitization, silicification, ankeritization and carbonatization. There is no obvious difference in contents of such trace elements as Cr,V,Co,Ni,Th,Zr,Hg,Nb,Ta and REE between auriferous rocks and wall rocks. Comparative studies on host rocks show that the rocks with good permeability and chemical and physical barriers to ore-forming solution are favorable for the formation of disseminated gold deposits. Petrological and geochemical studies suggest that the ore-forming solution changed from oxidizing and acid in the early stage into reducing and alkaline in the late stage. Based on associations of mineralizing elements, changes between ariferous rocks and wall rocks, and evolution of ore-forming solution, it is concluded that the gold deposit is an epithermal one. |
| keywords:Xiaotongjiapuzi gold deposit, disseminated type, petrological geochemistry, ore-forming solution, eastern Liaoning |
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