华南地质2023，Vol.39Issue(4)：601-616,16.DOI:10.3969/j.issn.2097-0013.2023.04.002
广西金秀龙华镍钴矿床矿石结构及其对矿床成因的启示
Ore Texture from Lon-ghua Nickel-cobalt Deposit in Jinxiu,Guangxi:Implication for the Genesis of the Deposit
摘要
Abstract
Longhua nickel-cobalt mine in Jinxiu,Guangxi Province,was a newly discovered high-grade nick-el-cobalt deposit in China in recent years,ore body of which is mainly controlled by the surrounding rocks and east-west fault,but the genesis is still highly controversial.Based on the first observation of the"fern-like zonal texture"which is common in five-element vein deposits,this paper compares and analyzes the critical aspects of source of metallogenic material,the source and nature of mineralization fluids,and the precipita-tion mechanism between the Longhua nickel-cobalt deposit and five-element vein deposits,and proposes that genetic type of the Longhua nickel-cobalt deposit may be a five-element vein deposit.The metallogenic mate-rial came from Cambrian strata,the mineralization fluid was dominated by basin brine and superimposed on meteoric water precipitation.The black carbonaceous mudstone-siltstone was the reducing barrier that trig-gered the precipitation of ore-forming materials,and the inflow of primary pyrite and CH4-containing reduc-ing fluids was the direct factor leading to the sedimentation of nickeline and other relevant ore-forming mate-rials.In particular,the formation of the symbolic"fern-like ring structure"may be the result of the slower thermochemical reduction of sulfate than arsenite in the fluids under specific pH conditions.关键词
镍钴矿床/五元素脉型矿床/砷化物/硫砷化物/红砷镍矿Key words
Ni-Co deposit/Five-element vein deposit/Arsenide/Sulfarsenide/Nickeline分类
地质学引用本文复制引用
杨奇荻,黄啸坤,李堃,刘飞,赵武强,周云,戴平云..广西金秀龙华镍钴矿床矿石结构及其对矿床成因的启示[J].华南地质,2023,39(4):601-616,16.基金项目
中国地质调查局项目(DD20230030 （）
DD20221689 （）
DD20230279),中国地质调查局花岗岩成岩成矿地质研究中心开放基金课题(PMGR202114,PMGR202309,PMGR202020),古生物与地质环境演化湖北省重点实验室开放研究基金(PEL-202112)和国家自然科学基金项目(41702240) （PMGR202114,PMGR202309,PMGR202020）
