凡口铅锌矿有机地球化学特征及成矿意义讨论

通过对凡口铅锌矿的围岩和矿石样品中有机碳(TOC)含量分析及有机抽提物的气相色谱和色谱—质谱分析,探讨了TOC在矿床中的空间变化特征、生物标志化合物的种类和特征。围岩中TOC含量明显大于其在矿体中的含量;围岩抽提物中的饱和烃百分含量明显高于矿体中的含量,而围岩中的芳香烃的含量远远低于矿体中的含量;矿体抽提物中的芳香烃菲的侧链受到很大程度的剥蚀。认为有机质不但作为整体在络合、活化、运移、富集成矿元素方面起到重要作用,而且有机物中单个分子为成矿作用提供部分氢和还原硫等成矿辅助元素。

Organic geochemical characteristics and discussion of metallogenetic significance in FanKou lead-zinc deposit

This paper deals with the special characteristics of organic carbon content varying along with the deposits and features as well as categories of organic marked compound of walk rock and ores in Shiling of FanKou lead-zinc deposit by analysis of TOC content.Gas chromatography and Mass spectrometry of extractable organic matter extracted from walk-rock and ores: the quality of the TOC and the ratios of saturated hydrocarbon in the walk rock is all more than that in ore,but the ratios of aromatic hydrocarbon in the walk rock is far less than that in ore.And the pH of the aromatic hydrocarbon in ore was deleted largely.The roles played by organic matter as during,and it is also the contributor of oxygen,hydrogen and reductive sulfur that elements are participated in metal enrichment.