矿床地质2024，Vol.43Issue(3)：478-502,25.DOI:10.16111/j.0258-7106.2024.03.002
赣南峰山离子型稀土矿床成矿机理探讨
Metallogenic mechanism of Fengshan ion adsorption REE deposit,southern Jiangxi Province
摘要
Abstract
The representative borehole drilling through the weathering crust at Fengshan in southern Jiangxi Province is selected as the research object in this paper.Based on the geological characteristics of each layer in the weather-ing crust,the characteristics of major and trace elements(including rare earth)and ionic-phase rare earth elements in each layer of the weathering crust are comprehensively discussed.The rare earth-bearing minerals in each layer of the weathering crust are analyzed by scanning electron microscopy and electron probe microanalysis.The dis-tribution of rare earth elements in the weathering crust shows an"arching"pattern.The ore body is located 2 to 9 m below the surface in the weathering crust.The average total rare earth elements(including Y)is 516.8× 10-6,the leaching rate of ionic phase rare earth elements is 51％～84％,and the distribution patterns of the ionic phase rare earth elements are consistent with those of the total phase rare earth elements.The rare earth elements in the weathering crust are in the form of ion adsorbed state and independent minerals such as secondary cerianite,resid-ual xenotime and fergusonite,the ion adsorbed state is dominant.The Fengshan REE deposit is characterized by coexisting LREE and HREE,with a dominance of heavy rare earth elements.The upper part of the ore body is rela-tively enriched with LREE,and the lower part is enriched with HREE.The enrichment and differentiation of REE in weathering crust is mainly controlled by the difference of geochemical behavior of LREE and HREE,weather-ing degree and clay mineral content.关键词
含稀土矿物/离子相和全相/成矿机理/离子吸附型稀土矿/赣南峰山Key words
rare earth elements-bearing minerals/ionic phase and full phase/metallogenic mechanism/ion adsorption REE deposit/Fengshan in southern Jiangxi Province分类
天文与地球科学引用本文复制引用
张蕊,吴德海,潘家永,余金杰,饶耕玮,唐梅华..赣南峰山离子型稀土矿床成矿机理探讨[J].矿床地质,2024,43(3):478-502,25.基金项目
本文得到"科技基础资源调查专项课题(编号:2022FY101703)"、"矿产资源国情调查与潜力动态评价(编号:DD20230040)"、"江西省地质勘查基金项目(编号:20220014和20180004)"和"基本科研业务费项目(编号:KK2206)"联合资助 （编号:2022FY101703）
