| 海南抱板金矿带地质特征及矿床成因 |
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| 引用本文：.1993.Geological characteristics and geneses of the Baoban gold ore belt,Hainan Province[J].Mineral Deposits,12(4):318~329 |
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| 基金项目:国家自然科学基金资助课题 |
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| 中文摘要:抱板金矿带产于戈枕脆韧性剪切断裂带西侧中元古代花岗岩体内接触带上。有剪切带蚀变岩型、石英脉型和含金伟晶岩型三种主要类型的矿床，以前一类最为重要。经多年研究认为，不同类型矿床的成矿时代不同，具多期成矿的特点。含金伟晶岩型和石英脉型金矿形成于海西期，成矿物质主要来自同期岩浆热液，含金剪切带的糜棱岩型金矿化发生于印支期，剪切带蚀变岩型金矿床形成于燕山期，成矿物质主要来自于与燕山期安玄玢岩同源的深部岩浆，但有大气水和老岩体及地层物质加入。 |
| 中文关键词:脆韧性剪切断裂带 多类型多成因 金矿床 海南抱板 |
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| Geological characteristics and geneses of the Baoban gold ore belt,Hainan Province |
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| Abstract:The Baoban gold ore belt occurs in the contact zone of the Middle Proterozoic granite on the western side of the Gezhen brittle-ductile shear fault. There exist three types of gold deposits, i.e. shear altered rock type, quartz vein type and auriferous pegmatite type, with the first type being most important. The Pb, S, H, O, Rb-Sr isotopic data and fluid inclusion studies show that different gold deposits were formed in different geological epochs, thus exhibiting polyphase ore-forming features: pegmatites and quartz veins were formed in Hercynian period, and their ore-forming materials and hydrothermal solution were mainly derived from Hercynian magma; mylonite type gold mineralization in the ductile shear zone took place in Indosinian period; shear altered rock type deposits were formed in Yanshanian period, and their ore-forming materials and hydrothermal solution were mainly derived from the same deep magma as the Yanshanian andestic basalt porphyrite, with the addition of meteoric water and materials from the Middle Proterozic granite and sedimentary sequence. |
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