广西上二叠统合山组黏土型锂矿的沉积环境及找矿方向分析OA
Depositional environment and prospecting targets for clay-type lithium deposits in the Upper Permian Heshan Formation,Guangxi
[研究目的]黏土型锂矿是锂矿资源的重要类型之一,本文以广西上二叠统合山组含煤-铝岩系为研究对象,开展黏土型锂矿的找矿方向研究,为该类型矿产的勘查部署提供科学依据.[研究方法]在上二叠统合山组沉积环境特征分析的基础上,揭示了黏土型锂矿中锂元素富集机制及其控制因素与沉积环境之间的耦合关系,指出有利于锂元素富集的沉积环境类型;继而建立区域综合找矿模型,开展黏土型锂矿成矿有利区预测.[研究结果]海陆过渡沉积环境有利于锂元素的富集成矿;广西晚二叠世合山组沉积期,桂西的大新古陆周缘近岸沉积区与局限台地区、桂中的开阔台地区为锂元素富集的有利区;合山组下段铝质岩段中的铝质黏土岩、碳质泥岩和该组上段底部的K7煤层为锂元素富集的重要层位.[结论]预测了桂西、桂中、桂西南和桂西北四个找锂有利区域,进一步指出桂西的平果、德保、靖西铝矿区找锂有利区,桂中的贤按煤田、合山煤田找锂有利区、桂西南的扶绥煤田找锂有利区及桂西北的乐业、凌云、巴马等铝矿区找锂有利区找矿前景良好,均有进一步工作价值.广西合山组含煤-铝岩系黏土型锂矿分布广泛且又相对集中,找矿空间大、找矿潜力足,应加大对该类型矿产的勘查投入,提升中国锂资源的供给能力.
[Objective]Clay-type lithium is an important type of lithium resource.This study focuses on the coal and bauxite-bearing strata of the Late Permian Heshan Formation in Guangxi and aims to identify prospecting targets for clay-type lithium mineralization,providing a scientific basis for future exploration planning.[Methods]Based on an analysis of the depositional environments of the Late Permian Heshan Formation,this study investigated the mechanisms and controlling factors of lithium enrichment in clay-type lithium deposits,and their coupling with the depositional environments.Favorable depositional environments for lithium enrichment were then identified,and a regional integrated prospecting model was established to predict prospective areas for clay-type lithium deposits.[Results]Marine-terrestrial transitional depositional environments are favorable for lithium enrichment and mineralization.Specifically,during deposition of the Late Permian Heshan Formation in Guangxi,the nearshore depositional zones along the margin of the Daxin paleoland and the restricted platform areas in western Guangxi,together with the open platform areas in central Guangxi,are favorable for lithium enrichment.The aluminous claystones and carbonaceous mudstones in the aluminous member of the lower part of the Heshan Formation,as well as the K7 coal seam at the base of the upper part,are the key lithium-enriched horizons.[Conclusions]Four prospective areas for lithium exploration were identified in western,central,southwestern,and northwestern Guangxi.Among them,the Pingguo,Debao,and Jingxi bauxite districts in western Guangxi,the Xian'an and Heshan coalfields in central Guangxi,the Fusui coalfield in southwestern Guangxi,and the Leye,Lingyun,and Bama bauxite districts in northwestern Guangxi are highlighted as favorable targets for further exploration.Clay-type lithium deposits hosted in the coal-and bauxite-bearing rock series of the Heshan Formation are widely distributed but relatively concentrated,indicating considerable exploration potential.Consequently,increasing exploration investment in this type of deposits is recommended to strengthen China's lithium supply capacity.
王辉;邓军;战明国;李活英;黄世财;彭志龙;严晓云;覃保锏;覃晓燕;徐惠恒
中国煤炭地质总局广西煤炭地质局,广西南宁 530299广西壮族自治区地质矿产勘查开发局,广西南宁 530000广西壮族自治区地质矿产勘查开发局,广西南宁 530000广西壮族自治区矿产资源储量评审中心,广西南宁 530028广西壮族自治区地质调查院,广西南宁 530015中国煤炭地质总局广西煤炭地质局,广西南宁 530299中国煤炭地质总局勘查研究总院,北京 100040中国煤炭地质总局广西煤炭地质局,广西南宁 530299中国煤炭地质总局广西煤炭地质局,广西南宁 530299中国煤炭地质总局广西煤炭地质局,广西南宁 530299
天文与地球科学
黏土型锂矿找锂有利区海陆过渡沉积环境上二叠统合山组广西矿产勘查工程
clay-type lithium depositmarine-terrestrial transitional depositional environmentprediction of favorable lithium prospecting areasUpper Permian Heshan FormationGuangximineral exploration engineering
《中国地质》 2026 (4)
1162-1175,14
自然资源部深地国家科技重大专项(2024ZD1002000-2024ZD1002005)、中国矿产地质志项目(DD20221695)联合资助. Supported by the Deep Earth National Science and Technology Major Project of the Ministry of Natural Resources(No.2024ZD1002000-2024ZD1002005)and the National Mineral Geology Records of China(No.DD20221695).
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