地质通报2025，Vol.44Issue(12)：2357-2372,16.DOI:10.12097/gbc.2024.12.061
达马拉造山带纳米比亚德拉斯特伟晶岩型锂矿成矿地质特征与锂资源前景分析
Geological characteristics and lithium resource prospects of De Rust pegmatite type lithium deposits in the Damara orogenic belt of Namibia
摘要
Abstract
[Objective]Aiming at the problem of unclear geological characteristics and resource development potential of the De Rust pegmatite-type lithium deposit in Namibia's Damara orogenic belt,this study reveals its metallogenic patterns and evaluates regional resource prospects through detailed fieldwork and analysis,providing a scientific basis for African lithium exploration and overseas resource development by Chinese enterprises.[Methods]Using field geological surveys,petrographic analysis,isotope chronology,geochemical testing,and tectonic evolution comparisons,we characterize the stratigraphy,structures,magmatic rocks,and ore body features of the De Rust mining area.Data from regional typical deposits(e.g.,Uis,Karibib)are integrated to assess metallogenic conditions and resource potential.[Results]The ore body occurs as veins within biotite schist of the Ames River Formation(Zerrissene Group,Damara Supergroup),displaying distinct planar zonation(from marginal quartz-muscovite zones to core massive spodumene-quartz zones)and vertical differentiation(shallow Li enrichment with average Li2O 0.63%and deep Nb-Ta mineralization).The main ore body measures 420 m in length and 46.20 m in width,with an estimated resource volume of 773 600 tons and spodumene content of 40%-60%.Mineralization is genetically linked to highly differentiated peraluminous S-type granite magmas during the late collisional stage(490～510 Ma).The Damara orogenic belt hosts over 100 Mt of proven lithium resources,with five major pegmatite metallogenic belts.The De Rust deposit shows significant potential in deep-seated ore shoots(Li2O grades up to 1.54%)and concealed orebodies,though it faces challenges including low-grade ore processing bottlenecks,limited deep exploration(current depth control≤200 m),and infrastructure shortages in arid regions.[Conclusions]The De Rust Lithium Deposit is a typical LCT-type granitic pegmatite deposit.Mineralization is controlled by magmatic differentiation and tectonic extension subsequent to the Neoproterozoic plate collision,with zonation serving as a key prospecting indicator.Endowed with superior regional lithium resource potential,the deposit is expected to become an important overseas base for the diversified supply of lithium resources in China,and holds strategic significance for the resource security of the global new energy industry chain.关键词
达马拉造山带/伟晶岩型锂矿/地质特征/分带性/资源前景/非洲Key words
Damara orogenic belt/pegmatite lithium/type features/zonation/resource prospects/Africa分类
天文与地球科学引用本文复制引用
曹强,邹振威,文佳豪,高原,张皓然,代鸿章,刘建龙,魏丰,王登红,刘善宝,王成辉,李鑫..达马拉造山带纳米比亚德拉斯特伟晶岩型锂矿成矿地质特征与锂资源前景分析[J].地质通报,2025,44(12):2357-2372,16.基金项目
国家重点研发计划项目《我国西部伟晶岩型锂等稀有金属成矿规律与勘查技术》(编号:2021YFC22901900、2021YFC22901905),中国地质调查局项目《战略新兴产业矿产地质调查工程》(编号:DD2023034)、《中国矿产地质志》(编号:DD20190379)和自然资源部科技支撑项目《松潘-甘孜锂稀有金属矿关键勘查技术与找矿预测模型》(编号:ZKKJ202412)Supported by National Key Research and Development Program of China(Nos.2021YFC22901900,2021YFC22901905),the China Geological Survey Projects(Nos.DD2023034,DD20190379),and the Science and Technology Support Project of the Ministry of Natural Resources(No.ZKKJ202412) （编号:2021YFC22901900、2021YFC22901905）
