沉积学报2026，Vol.44Issue(2)：577-595,19.DOI:10.14027/j.issn.1000-0550.2024.031
铝土矿型富锂黏土的物源属性及其富锂机制
Provenance Characteristics and Lithium Enrichment Mechanism of Bauxite-Type Lithium Rich Clay:A case study in the Yunnan-Guizhou region
摘要
Abstract
[Objective]Lithium rich claystone deposits with great potential for mineralization have been found in the bauxite-bearing sedimentary strata of Yunnan-Guizhou region in Southwest China,but the current understanding of the material sources and lithium enrichment mechanisms of these bauxite-type lithium rich claystones in these areas is still significantly insufficient.[Methods]In this study,two sets of bauxite-type lithium rich claystone systems,the Early Permian Daoshitou Formation in Yunnan and the Lower Carboniferous Jiujialu Formation in Guizhou,were ana-lyzed in terms of their mineralogical compositions,major and trace elements,and the compositions of rare earth ele-ments.Combined with the results of previous research,the study systematically explored the source attributes of two sets of bauxite-type lithium-rich claystone systems,which were formed in different epochs but have very similar petro-graphic characteristics,as well as determining the factors that led to the anomalous enrichment of lithium.[Results and Conclusions]The results showed that the differences in source properties between the lithium rich claystones of the Jiujialu Formation in Guizhou and the Daoshitou Formation in Yunnan had a significant influence on their lithium content.In general,the development of the Jiujialu Formation,which has relatively low lithium content,is closely related to the weathering and denudation of impure dolomite in the underlying Loushanguan Group.Its original source may have been Neoproterozoic-Middle Proterozoic neutral acidic magmatism,which is significantly influenced by Mg-Fe compositions.The formation of Yunnan Daoshitou Formation claystones with relatively high lithium content was significantly influenced by the recycling of Ordovician sedimentary rocks,while the source connection with its under-lying carbonate strata was weak.Their original source was dominated by neutral acidic magmatism.In addition,the lithium rich clay rocks in the Yunnan-Guizhou region were hosted by either kaolinite or illite,and the drainage of the watershed during the depositional period and the effect of coexisting ions in the water body played important roles in restricting the lithium enrichment in the clay.Analyzing the provenance of lithium rich clay rocks in the Jiujialu For-mation in Guizhou and the Daoshitou Formation in Yunnan,along with the occurrence of lithium-bearing minerals,is of significant importance for understanding the ore-forming processes and controlling mechanisms of clay-type lithium deposits.关键词
铝土矿型富锂黏土岩/物源属性/富锂机制/滇黔地区Key words
bauxite-type lithium-rich claystone/provenance characteristics/lithium enrichment mechanism/Yunnan-Guizhou area分类
天文与地球科学引用本文复制引用
王亚平,苗卫良,李雯霞,李长忠,赵辉斌,张西营..铝土矿型富锂黏土的物源属性及其富锂机制[J].沉积学报,2026,44(2):577-595,19.基金项目
国家自然科学基金区域创新发展联合基金重点项目(U22A20573) （U22A20573）
中国科学院西部之光青年学者项目(2020年度) （2020年度）
中国科学院青海盐湖所基础研究青年创新交叉团队项目(ISLJCTD-2022-2) （ISLJCTD-2022-2）
青海省科技厅自然科学基金应用基础项目(2020-ZJ-765) the National Natural Science Foundation of China(U22A20573) （2020-ZJ-765）
the Western Light Foundation of Chinese Academy of Sciences(Grant to WL Miao) （Grant to WL Miao）
the Youth Innovation Cross Team of Basic Research Program of Qinghai Institute of Salt lakes,CAS(ISLJCTD-2022-2) （ISLJCTD-2022-2）
the Natural Science Foundation of Qinghai Provincial Science and Technology Department(2020-ZJ-765) （2020-ZJ-765）
