Geochemical characteristics and provenance of lithium in the Late Permian Heshan Formation coal-bearing series from the Wanfu mining area,Shanglin,Guangxi Province
Lithium element enrichment is widely observed in the coal-bearing series of the Late Permian Heshan Forma-tion in Shanglin,Guangxi,which has potential economic value and research significance.In this study,a multi-proxy study was conducted for evaluating major elements,trace elements,zircon U-Pb dating,and zircon trace elements from the lithium mineralization layers to characterize the spatial distribution,elemental geochemical characteristics,and proven-ance of lithium mineralization layers of the Late Permian Heshan Formation coal-bearing series in the Wanfu mining area,Shanglin,Guangxi.Thirty four samples were selected from lithium mineralization layers in order to determine major ele-ments and trace elements.Moreover,the zircon U-Pb dating and zircon trace elements of one sample was investigated.The study reveals that four sets of lithium mineralization layers,namely Ⅰ,Ⅱ,Ⅲ,and Ⅳ,are developed from bottom to top in the Heshan Formation coal-bearing series from the Wanfu mining area,Shanglin,Guangxi.According to the order of lithium content from high to low,it is divided into lithium mineralization layers Ⅰ,Ⅲ,Ⅱ and Ⅳ.Compared with average values for world claystone,the lithium mineralization layer Ⅰ are highly enriched in Li,the Ⅱ and Ⅲ is enriched in Li,and the Ⅳ is slightly enriched in Li.The analysis of Al2O3-TiO2,La/Sc-Th/Co and V-Ni-Th×10 diagrams indicate that most of the samples of lithium mineralization layer Ⅰ,Ⅲ and Ⅳ fall close to the acidic volcanic rocks field,while a few samples of lithium mineralization layer Ⅰ fall near the intermediate volcanic rocks field.Therefore,it is inferred that the lithium mineralization layers of the Heshan Formation in Shanglin,Guangxi are dominated by sediments derived from the acidic and intermediate volcanic rocks.The Zircon U-Pb dating,Th/Nb-Hf/Th and Th/U-Nb/Hf tectonic setting discrimination diagrams of zircon trace elements,rare earth elements analysis,and Al2O3-TiO2,La/Sc-Th/Co,V-Ni-Th×10 and Nb/Y-Zr/TiO2 source rock discrimination diagrams indicate that the lithium mineralization layers of the Heshan Forma-tion coal-bearing series in the Wanfu mining area mainly come from acidic and intermediate volcanic rocks related to the Emeishan Igneous Province and the Paleo-Tethys Permian magmatic arc.
lithium in coal-bearing seriesgeochemistryHeshan FormationWanfu mining areazircon U-Pb datingprovenance
万方数据
维普
