湘北仁里花岗伟晶岩型稀有金属矿床红外光谱特征研究及勘查应用  

Study on the characteristics of the infrared spectral and exploration application of Renli granite pegmatite type rare metal deposit in northern Hunan

作　　者：王猛 刘新星 李建康[3] 周芳春 李鹏 张娟 成嘉伟 邱佳炜 WANG Meng;LIU XinXing;LI JianKang;ZHOU FangChun;LI Peng;ZHANG Juan;CHENG JiaWei;QIU JiaWei(Hebei Key Laboratory of Strategic Critical Mineral Resources,Hebei GEO University,Shijiazhuang 050031,China;College of Earth Sciences,Hebei GEO University,Shijiazhuang 050031,China;MNR Key Laboratory of Metallogeny and Mineral Resource Assessment,Institute of Mineral Resources,Chinese Academy of Geological Sciences,Beijing 100037,China;Hunan Geological Disaster Investigation and Monitoring Institute,Changsha 410011,China)

机构地区：[1]河北地质大学,河北省战略性关键矿产资源重点实验室,石家庄050031 [2]河北地质大学地球科学学院,石家庄050031 [3]中国地质科学院矿产资源研究所,自然资源部成矿作用与资源评价重点实验室,北京100037 [4]湖南省地质灾害调查监测所,长沙410011

出　　处：《岩石学报》2023年第7期2101-2116,共16页Acta Petrologica Sinica

基　　金：国家研发计划项目(2019YFC0605200);国家自然科学基金项目(41702352);河北地质大学科技创新团队项目(KJCXTD-2021-10);河北地质大学学生科技基金科研项目(KAY202313)联合资助.

摘　　要：仁里铌钽多金属矿是近年来在江南隆起带内发现的一个超大型稀有金属矿床,仁里地区稀有金属找矿潜力巨大。本文采用红外光谱技术对仁里矿床钻孔ZK708、ZK716开展了矿物光谱填图工作,结合矿物镜下和地球化学分析,查明该矿床的蚀变矿物种类及组合,探讨了仁里矿床中典型蚀变矿物波谱特征与矿化之间的关系,构建了仁里矿床的红外光谱勘查模型,并对幕阜山西南缘地表进行热液蚀变中心的圈定。研究发现:(1)伟晶岩中白云母Pos2200(2197~2198nm)异常低值,IC值异常高值(>3)可作为找矿指标;(2)通过对幕阜山西南缘地表白云母特征参数研究可知,幕阜山西南缘寒石村附近存在成矿有利区域,永享村东南为区域的热液蚀变中心。红外光谱技术可以有效地查明仁里地区的矿床蚀变分带和矿化中心,为幕阜山稀有金属矿床的进一步找矿勘查工作提供科学依据。Renli is a super large rare metal deposit discovered in Jiangnan uplift belt in recent years.In this paper,the spectral mapping of ZK708,ZK716 in Renli area is carried out by using infrared spectroscopy technology,combined with mineral microscopic and geochemical analysis,finding out the types and combinations of altered minerals in the deposit,and the spectral characteristics of typical altered minerals in Renli deposit are discussed in relation to mineralization,building the infrared spectrum exploration model of Renli deposit,at the same time,predicting the hydrothermal alteration center of the surface in the southern margin of the Mufushan area.Research findings:(1)The low value of Pos2200(2197~2198nm),The abnormally high value of IC(>3)of muscovite in pegmatite in the area is taken as the prospecting index;(2)There is a favorable metallogenic area near Hanshi Village in the southwestern Mufushan,and Yongxiang Village is thought as the regional hydrothermal alteration center.The infrared spectroscopy technology can effectively identify the alteration zoning and mineralization center of the rare metals deposit in Renli area,and provide a scientific basis for its further prospecting and exploration.

关 键 词：稀有金属矿床 仁里 短波红外 热红外 蚀变 

分 类 号：P575.4[天文地球—矿物学] P618.7[天文地球—地质学]