沉积与特提斯地质2025，Vol.45Issue(4)：776-787,12.DOI:10.19826/j.cnki.1009-3850.2025.11001
综合地球物理方法在离子型稀土矿原位浸矿开采中的应用
Application of integrated geophysical methods in in-situ leaching of ion-absorption type REE deposits
摘要
Abstract
Ion-adsorption type REE deposits are the primary global source of heavy rare earth elements(HREEs)and constitute critical strategic mineral resources.Addressing the challenge of effectively controlling the seepage flow of leaching solutions during in-situ leaching mining of ionic rare earth ores,this study investigates a typical mining area in Gannan,southern Jiangxi Province.A combination of the multi-electrode resistivity method and the audio-frequency magnetotelluric(AMT)method was employed to accurately delineate the deep electrical structure of the study area.The resistivity profile reveals a distinct three-layer electrical structure characterized by high-medium-high resistivity values.The shallow,high-resistivity layer corresponds to a desiccated and water-deficient weathered crust;the intermediate,medium-resistivity layer is attributed to the water-bearing or partially weathered layer;and the basal high-resistivity layer is interpreted as the bedrock.Borehole data confirmed the presence of a minor shallow subsurface fracture zone inferred from the geophysical results,with an influence depth of approximately 120 meters.Through three-dimensional(3D)integrated geophysical modeling,a 3D visualization model of the orebody-fracture-groundwater seepage system was constructed.The results demonstrate that fractured bedrock zones and hydrogeological conditions are the primary factors controlling the escape of leaching-solutions.Consequently,targeted anti-seepage engineering measures need to be implemented on the northwestern fault and southwestern slope before mining operations.关键词
离子型稀土/原位浸矿开采/风化层结构探测/综合地球物理方法/防渗Key words
ionic rare earth/in-situ leaching mining/weathered layer structure detection/integrated geophysical methods/anti-seepage分类
天文与地球科学引用本文复制引用
刘应冬,程蓉,龚大兴,代力,朱志敏..综合地球物理方法在离子型稀土矿原位浸矿开采中的应用[J].沉积与特提斯地质,2025,45(4):776-787,12.基金项目
四川省自然科学基金(2024NSFSC0095) （2024NSFSC0095）
国家重点研发计划(2021YFC2902201) （2021YFC2902201）
中国地质调查局地质调查项目(DD20230204101) （DD20230204101）
