紫金山矿田Cu-Fe-S矿物的EPMA和LA-ICP-MS微区元素分析及地质意义

发布时间：2018-06-25 14:20

本文选题：紫金山矿田 + 铜铁硫化物　；参考：《地学前缘》2017年05期

【摘要】：应用EPMA和LA-ICP-MS微区分析技术,首次揭示了紫金矿田中铜铁硫化物的主、微量元素分布特征。研究表明紫金山铜金矿浅部蓝辉铜矿石的铜矿物具有富Se的特征,其中铜蓝中的Se最高可达1.57%,并出现Se的成分环带特征。LA-ICP-MS的微量元素分析表明蓝辉铜矿和久辉铜矿中含较高的Au(1×10-6)和Ag,是金、银的重要载体,同时含较高含量的Bi、Sn、As和Se,与次生富集成因存在着显著的区别。紫金山铜金矿和龙江亭铜矿的斑铜矿是重要的Ag和Bi载体,不同阶段的斑铜矿的微量元素有差异,高硫化阶段的斑铜矿Bi含量较高,而中低硫化阶段的斑铜矿Ag和Sn含量较高。黄铜矿含少量的Ag,但出现了较高的In(约30×10-6),是铟的重要载体。高硫化阶段的黄铁矿具有更高的Cu和Ni。此外,矿石矿物中普遍含有较高的Se、Te、Ge和As,均表明紫金山矿田的矿床与火山活动的热液作用紧密相关。紫金山铜金矿床中出现的W、Sn、Mo、Bi和In元素异常带是一种指示斑岩型矿化向高硫化型矿化过渡的地球化学标志,指示紫金山深部具有潜在的斑岩成矿潜力。
[Abstract]:EPMA and LA-ICP-MS microanalysis techniques were used to reveal the distribution characteristics of main and trace elements of copper and iron sulfide in Zijin ore field for the first time. The results show that the copper minerals of the shallow blue glow copper ores in Zijinshan copper and gold deposit are rich in se. The highest se content in copper blue is up to 1.57, and the trace element analysis of the composition of se. LA-ICP-MS shows that the blue chalcocite and euchalcovite contain high au (1 脳 10-6) and Ag. they are important carriers of gold and silver. At the same time, there are significant differences between the secondary enrichment and the higher content of Bio SnAs and See. In Zijinshan Copper Deposit and Longjiangting Copper Mine, the placenta copper deposit is an important carrier of Ag and Bi. The trace elements of the placenta copper deposit are different in different stages, and the Bi content of the placenta copper deposit in the high sulphide stage is higher, while the Ag and Sn content in the porphyry copper mine in the middle and low vulcanization stage is higher. Chalcopyrite contains a small amount of Ag. but high in (about 30 脳 10 ~ (-6) is an important carrier of indium. Pyrite at high sulphide stage has higher Cu and Ni contents. In addition, the ore minerals generally contain high Seedle Tegnag GE and As. both indicate that the deposit in Zijinshan Orefield is closely related to the hydrothermal process of volcanic activity. The anomalous zone of the elements in the Zijinshan copper-gold deposit is a geochemical indicator indicating the transition from porphyry mineralization to high sulphide mineralization, indicating that the deep part of Zijinshan has potential porphyry metallogenic potential.
【作者单位】：福州大学紫金矿业学院;中国地质科学院矿产资源研究所;
【基金】：国家自然科学基金项目(41002016,41672035) 国土资源部公益性行业科研专项(201411050) 国家重点研发计划课题(2016YFC06002008)
【分类号】：P618.2

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