西藏冈底斯鸡公村脉状Mo-Re矿床中铼的富集规律研究  

Study of the rhenium enrichment in the Jigongcun vein-type Mo-Re deposit in the Gangdese belt,Tibet

作　　者：邹佳男 李光明[1,2,3] 赵俊兴 余可龙[1,2] Zou Jianan;Li Guangming;Zhao Junxing;Yu Kelong(Key Laboratory of Mineral Resources,Chinese Academy of Sciences,Beijing 100029;College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100049;Institutions of Earth Science,Chinese Academy of Sciences,Beijing 100029)

机构地区：[1]中国科学院矿产资源研究重点实验室,中国科学院地质与地球物理研究所,北京100029 [2]中国科学院大学地球与行星科学学院,北京100049 [3]中国科学院地球科学研究院,北京100029

出　　处：《地质科学》2023年第2期617-634,共18页Chinese Journal of Geology(Scientia Geologica Sinica)

基　　金：国家自然科学基金项目(编号:41972089,41872086)资助。

摘　　要：铼(Re)作为关键矿产之一,其富集特征和迁移规律一直受到国内外的广泛关注,但由于对铼的研究大部分集中在斑岩型矿床中,对石英脉型Mo-Re矿床中铼的富集规律并不清楚。本文以鸡公村脉状Mo-Re矿床为对象,通过岩相学观察,重新处理矿区的Re品位资料并结合电子探针分析,得出在矿床尺度下,鸡公村Mo-Re品位具有较好相关性,且辉钼矿中的Re含量在Mo品位出现高值异常时表现为与品位的负相关关系,在Mo品位较低时表现为与Mo的正相关关系;辉钼矿中的Re含量总体遵循厚脉高于早期细脉,厚脉中从边部向核部Re含量逐渐减少,团块状辉钼矿的Re含量拥有更小的分布区间、平均含量低于片状辉钼矿,早阶段的Re平均含量高于晚阶段辉钼矿Re含量的特点;矿物尺度下,辉钼矿中的Re在微米范围分布不均一,以上结论提供了该石英脉型Mo-Re矿床中Re的空间分布特征,为继续探讨该类型矿床的Re富集机制奠定了基础。As one of the critical minerals,rhenium(Re)has been widely concerned about its enrichment characteristics and migration way both domestically and internationally.However,as research on rhenium has largely focused on porphyry deposits,the enrichment of rhenium in quartz vein-type Mo-Re deposits is unclear.Taking the Jigongcun vein-type Mo-Re deposit as the example,through petrographic observation,reprocess the Re grade data in the mining area and combine it with the electronic probe analysis(EPMA).We concluded that the Mo-Re grade in Jigongcun has a good correlation,and the Re content in molybdenite exhibits a negative correlation with the grade when the Mo grade has a high value anomaly and a positive correlation with Mo when the Mo grade is low;The distribution of Re in molybdenite generally exhibits the traits that the thick vein are higher than the early veinlet;the Re content of thick vein gradually decreases from the edge to the core,the massive molybdenite has a smaller distribution range,the average Re content is lower than the bladed molybdenite,and the average content of Re in the early stage is higher than that in the late stage.At the mineral scale,the distribution of Re in molybdenite is not homogenized in the micron range.The above conclusions provide the spatial distribution characteristics of Re in the quartz vein-type Mo-Re deposit,and lay a foundation for further discussion of the Re enrichment mechanism of this type of deposit.

关 键 词：鸡公村矿床 辉钼矿 Re的富集规律 

分 类 号：P612[天文地球—矿床学] P618.87[天文地球—地质学]