| 南京栖霞山多金属矿床的有机成矿作用 |
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| 引用本文：.1997.Organic ore-forming process in the Qixiashan polymetallic deposit, Nanjing City, Jiangsu Province[J].Mineral Deposits,16(4):289~297 |
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| 基金项目:国家自然科学基金（49672114）和地质矿产部生物成矿作用重点学科生长点基金（92012019） |
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| 中文摘要:通过检测南京栖霞山多金属矿床成矿流体中的系列生物标志化合物，确证了成矿流体中的有机质源于赋矿地层中的菌藻类生物。成矿流体中的有机质富含有较多的杂原子，流体中的Zn含量高达200.4×106，表明成矿元素能以有机-金属络合物的形式搬运。矿石中的Pb、Zn总量与S/C比值存在一定关系，有机质通过还原SO42-而为矿质沉淀提供S2-。并由此提出长江中下游地区许多矿床赋存于石炭-三叠系中与有机质、有机流体的这些成矿作用有一定的关系。 |
| 中文关键词:多金属矿床 有机包裹体 生物标志化合物 成矿作用 南京牺霞山 |
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| Organic ore-forming process in the Qixiashan polymetallic deposit, Nanjing City, Jiangsu Province |
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| Abstract:Biomineralization evolves coincidently with other geological processes. Many geologists have already discussed the participation of organisms in the ore-forming process of the Qixi-ashan polymetallic deposit, and this paper deals emphatically with the role of organic matter and organic fluids in metallogenesis. Combined the non-destrucive analytical techniques like optical analysis and ultraviolet fluorescent and infrared spectroscopy with the destructive techniques such as gas chromatography and gas chromatography-mass sepetrography, this paper has systematically studied hydrocarbon inclusions discovered in the ore deposit, detected series of biomarkers in the ore-forming fluids, and compared the difference in extractable organic matter among host rocks ,ores and inclusions. Characteristics of organic matter in fluids and relationships of ore-forming elements to organic: carbon and sulfur show that some ore-forming elernents were transported by organometallic complexes. and that organic fluids provided S2- for the precipitation of metals. On such a basis, some ore-forming processes of the stratabound polymetallic deposits in the middle and lower reaches of the Yangtze River are discussed. |
| keywords:polymetallic deposit , hydrocarbon inclusion, biomarker, ore-forming process, Qixia Mountain of Nanjing |
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