桂西沉积型锂矿资源潜力分析

    RESOURCE POTENTIAL ANALYSIS OF SEDIMENTARY LITHIUM DEPOSITS IN WEST GUANGXI REGION

    • 摘要: 桂西地区是我国重要的铝土矿产区,共、伴生有镓、钪等多种稀有、稀土元素.为探讨其锂矿资源潜力,在对区域地质背景、锂地球化学异常、矿产分布等综合分析的基础上,对比了以右江断裂为界的南北两侧锂异常特征和物源差异:南侧锂异常可能主要源于局限台地,异常与二叠系合山组吻合;北侧锂异常则与石炭系尧云岭组更加密切,引起异常物质可能主要源于扬子地台碳酸盐岩风化.初步认为桂西锂矿勘查应优先在右江断裂以北展开,以碳酸盐黏土型锂矿为主要目标,以Li、Be、Fe2O3等综合异常区的碳酸盐岩古风化壳,尤其是石炭系尧云岭组和二叠系合山组中的古风化壳为主要目标层位.

       

      Abstract: Guixi area(West Guangxi), an important bauxite deposit concentrated area in China, is associated with a variety of rare and rare earth elements such as gallium and scandium. To explore the lithium resource potential, based on the comprehensive analysis of regional geological background, lithium geochemical anomaly and mineral distribution, the lithium anomaly characteristics and provenance differences on the north and south sides divided by the Youjiang fault are compared:The south lithium anomaly may be mainly from restricted platform, which is consistent with the Permian Heshan Formation; while the north lithium anomaly is much closely related with the Carboniferous Yaoyunling Formation, mainly caused by the weathering of carbonate rocks in Yangtze Platform. It is preliminarily considered that the lithium exploration in Guixi area should be carried out in the north of Youjiang fault first, with carbonate-hosted clay type lithium deposit as the major target. The paleo-weathering crusts of carbonate rocks in Li, Be and Fe2O3 comprehensive anomaly areas, especially those in the Carboniferous Yaoyunling Formation and Permian Heshan Formation should be the main target layers.

       

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