岩矿测试2024，Vol.43Issue(4)：546-557,12.DOI:10.15898/j.ykcs.202301040002
赣南斑岩锡矿田云英岩型锂矿中锂的赋存状态研究
Occurrence State of Lithium of a Greisen-Type Lithium Deposit in the Porphyry Sn-Ore Field,Southern Jiangxi Province
摘要
Abstract
Greisen-type Li ore,a new type of lithium ore in recent years,is of great theoretical research and economic value.However,there is slightly insufficient in comprehensive evaluation of greisen-type Li ore in such a world-class Nanling W-Sn metallogenic province and its surroundings.In this work,we found greisen-type Li mineralization firstly in the Yanbei Sn-ore field,Huichang district,Jiangxi Province.The lithium mineralization occurred at the greisen belt near the contact zone between the Minkengshan granitic batholith and overlying volcanic rock of the Jilongzhang Formation.Three types of mineralization were identified:the greisen type,the quartz vein type in granite,and the quartz vein type in volcanic rock.The content of Li2O reaches 1.04％and mainly ranges from 0.2％-0.3％,which is of significant comprehensive utilization value.The occurrence state of lithium and the metallogenic characteristics based on the detailed microscopic observation,scanning electron microscope(SEM)images,electron probe microanalysis(EPMA)and laser ablation-inductively coupled plasma-mass spectrometry(LA-ICP-MS)is determined here.There is a potential difference between the Yanbei ore field and other domestic and international typical greisen-type lithium deposits,which develop lepidolite-ferrolepidolite series.The main Li-bearing mineral is protolithionite in the Yanbei ore field,and it is identified as high Si,Al,K,Fe and Li with no significant extreme fluid differentiation process.The Li,co-accumulated with Sn in the post-magmatic high-temperature gas-liquid stage,can be linked to the porphyritic fine-grained granite and enter mica via coupling substitution of Si4++Li+(⇔)AlⅣ+FeT.关键词
斑岩锡矿田/锂/黑鳞云母/扫描电镜/电子探针/云英岩/赋存状态Key words
porphyry tin ore field/Li/protolithionite/scanning electron microscope/electron probe microanalyzer/greisen/occurrence state分类
天文与地球科学引用本文复制引用
秦锦华,刘善宝,郭志强,王成辉,张树德,钟先源..赣南斑岩锡矿田云英岩型锂矿中锂的赋存状态研究[J].岩矿测试,2024,43(4):546-557,12.基金项目
国家重点研发计划项目课题"南岭钨锡多金属矿集区三维综合探测与深部成矿预测"(2022YFC2905101) （2022YFC2905101）
中国地质调查局地质调查项目"中国矿产地质志"(DD20221684,DD20190379) （DD20221684,DD20190379）
中国地质科学院基本业务费项目"江西会昌淘锡坝—岩背矿田多期成锡机制研究"(KK2218) （KK2218）
