地质科学2024，Vol.59Issue(4)：961-970,10.DOI:10.12017/dzkx.2024.068
湘东北连云山上石地区伟晶岩型稀有金属矿床的发现及意义
Discovery and significance of pegmatitic rare metal deposits in Shangshi area,Lianyunshan,Northeast Hunan Province
摘要
Abstract
The northeast of Hunan Province,located in the northwestern margin of the central part of the Qinzhou-Hangzhou metallogenic zone,has always been an important polymetallic metallogenic area of Au,Cu,Co,Pb and Zn in China.In this"Li-Co ore survey evaluation and target selection in Lianyunshan area of Hunan Province"project,we carried out the 1∶10 000 geological mapping process and found a large number of spodumene veins,whose single sample grade reached 1.78％.In addition,25 pegmatite veins were found,ranging from 1～10 meters in width,extending mainly in N-W and near E-W directions and from several meters to hundreds of meters.More than 20 mineralized spots of pegmatite were identified,including spodumene,niobium-tantalite,beryl and other rare metal minerals.There are obvious gradual zonings between pegmatite dike and surrounding rock,which can be subdivided into migmatite schist zone(Ⅰ),monzonite granite zone(Ⅱ),tourmaline pegmatite zone(Ⅲ)and massive albitite+spodumene zone(Ⅵ).The lithium ore bodies are mostly located in the massive albitite+spodumene zone,accompanied by a large number of giant crystal tourmaline,muscovite,etc.,showing good lithium metallogenic potential.A large number of rare minerals such as niobium-tantalite and beryl are associated,and some of which reach the co-associated grade of lithium ore.The main ore-bearing pegmatite vein of the deposit is near east-west trend,with a length of more than 1 km,a width of several meters to tens of meters,and a thickness of more than 100 meters.The average grade of Li2O is 1.42％,and the predicted reserves are about 2.56×104 t,which can reach medium scale.The discovery of pegmatitic lithium rare metal deposit in Shangshi area has completely changed the distribution pattern of rare metals dominated by Be-Nb-Ta,indicating the great potential of rare metal mineralization in this area,and of great guiding significance for the new round of ore exploration.关键词
稀有金属矿床/伟晶岩分带/上石锂矿床/连云山地区/湘东北Key words
Rare metal deposit/Zonation of pegmatite/Lithium deposit of Shangshi/Lianyunshan area/Northeast of Hunan Province分类
天文与地球科学引用本文复制引用
文志林,黄明,许国锋,张云飞,黄宝亮,李荫中,刘磊..湘东北连云山上石地区伟晶岩型稀有金属矿床的发现及意义[J].地质科学,2024,59(4):961-970,10.基金项目
国家自然科学基金面上项目(编号:41972198)、湖南省省级财政地质勘查项目(编号:2024003)、湖南省自然科学基金面上项目(编号:2022JJ30702)和江南陆块南缘成矿带(东段)战略性矿产调查项目(编号:DD20240066)资助 （编号:41972198）
