{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,15]],"date-time":"2026-10-15T19:24:02Z","timestamp":1792092242575,"version":"4.4.0"},"reference-count":75,"publisher":"Public Library of Science (PLoS)","issue":"7","license":[{"start":{"date-parts":[[2025,7,29]],"date-time":"2025-07-29T00:00:00Z","timestamp":1753747200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Scientific Research of the Xichang University","award":["YBZ202344"],"award-info":[{"award-number":["YBZ202344"]}]},{"name":"Scientific Research of the Xichang University","award":["YBZ202345"],"award-info":[{"award-number":["YBZ202345"]}]},{"name":"Scientific Research of the Xichang University","award":["D202403"],"award-info":[{"award-number":["D202403"]}]},{"name":"Scientific Research of the Xichang University","award":["YBZ202263"],"award-info":[{"award-number":["YBZ202263"]}]}],"content-domain":{"domain":["www.plosone.org"],"crossmark-restriction":false},"short-container-title":["PLoS One"],"abstract":"<jats:p>The Kuanyu ion-adsorption rare earth element (REE) deposit, Sichuan\u2019s first economically viable resource of its type, remains underexplored in terms of REE fractionation and enrichment mechanisms within its weathering profiles. This study systematically resolves REE speciation patterns and light-to-heavy REE (LREE\/HREE) differentiation processes, advancing the metallogenic framework fo r such deposits. Analytical results demonstrate: (1) A vertically progressive enrichment of LREE-dominated REE concentrations from bedrock to topsoil, with the fully weathered layer serving as the primary enrichment zone; (2) Weathering of primary REE-bearing minerals and subsequent secondary mineral formation as drivers of elemental redistribution; (3) Contrasting controls by clay minerals, iron-manganese oxides, and humic acids\u2014clay minerals preferentially adsorb LREEs, while iron-manganese oxides exhibit stronger HREE affinity through inner-sphere complexation, and humic acids enhance HREE mobility via stable complex formation. These findings establish iron-manganese oxides and organic ligands as dual regulators of REE fractionation, refining predictive models for ion-adsorption REE exploration in granitic weathering systems.<\/jats:p>","DOI":"10.1371\/journal.pone.0329138","type":"journal-article","created":{"date-parts":[[2025,7,29]],"date-time":"2025-07-29T17:29:29Z","timestamp":1753810169000},"page":"e0329138","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":5,"title":["Fractionation mechanisms of rare earth element speciation in granitic weathering profiles: Metallogenic implications for the kuanyu ion-adsorption REE deposit, dechang, SW China"],"prefix":"10.1371","volume":"20","author":[{"given":"Lijun","family":"Qian","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0006-9846-1156","authenticated-orcid":true,"given":"Lihua","family":"Ou","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guoxin","family":"Li","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xuepeng","family":"Xiao","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bo","family":"Qian","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"340","published-online":{"date-parts":[[2025,7,29]]},"reference":[{"key":"pone.0329138.ref001","doi-asserted-by":"crossref","first-page":"103521","DOI":"10.1016\/j.oregeorev.2020.103521","article-title":"The story of rare earth elements 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Balaram","year":"2019","journal-title":"Geoscience Frontiers"},{"key":"pone.0329138.ref023","doi-asserted-by":"crossref","first-page":"131","DOI":"10.1016\/j.envdev.2013.03.006","article-title":"China\u2019s ion-adsorption rare earth resources, mining consequences and preservation","volume":"8","author":"XJ Yang","year":"2013","journal-title":"Environmental Development"},{"key":"pone.0329138.ref024","doi-asserted-by":"crossref","first-page":"158","DOI":"10.1016\/j.apgeochem.2017.10.020","article-title":"Rare earth elements sorption to iron oxyhydroxide: Model development and application to groundwater","volume":"87","author":"H Liu","year":"2017","journal-title":"Applied Geochemistry"},{"key":"pone.0329138.ref025","doi-asserted-by":"crossref","first-page":"104172","DOI":"10.1016\/j.oregeorev.2021.104172","article-title":"REE fractionation controlled by REE speciation during formation of the Renju regolith-hosted REE deposits in Guangdong Province, South 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Ali","year":"2005","journal-title":"Lithos"},{"issue":"3","key":"pone.0329138.ref032","doi-asserted-by":"crossref","first-page":"369","DOI":"10.1016\/j.gsf.2013.07.003","article-title":"The Emeishan large igneous province: A synthesis","volume":"5","author":"JG Shellnutt","year":"2014","journal-title":"Geoscience Frontiers"},{"issue":"10","key":"pone.0329138.ref033","first-page":"2947","article-title":"Geochronology and geochemistry of the Cida complex in the Panxi district: Constraints on the duration of the Emeishan mantle plume","volume":"27","author":"L Wenjuan","year":"2011","journal-title":"Acta Petrologica Sinica"},{"issue":"3","key":"pone.0329138.ref034","first-page":"398","article-title":"Zircon SHRIMP U-Pb dating of the Cida alkali complex in the Dechang area, southern Sichuan, China","volume":"25","author":"Q Lin","year":"2006","journal-title":"Geological Bulletin of China"},{"key":"pone.0329138.ref035","doi-asserted-by":"crossref","first-page":"105723","DOI":"10.1016\/j.oregeorev.2023.105723","article-title":"Zinc and cadmium isotopic constraints on metal sources of the Xitieshan Pb-Zn deposit, NW China","volume":"162","author":"Z Zhao","year":"2023","journal-title":"Ore Geology Reviews"},{"key":"pone.0329138.ref036","doi-asserted-by":"crossref","first-page":"10231","DOI":"10.1038\/srep10231","article-title":"Formation of carbonatite-related giant rare-earth-element deposits by the recycling of marine sediments","volume":"5","author":"Z Hou","year":"2015","journal-title":"Sci Rep"},{"key":"pone.0329138.ref037","doi-asserted-by":"crossref","first-page":"437","DOI":"10.1016\/j.oregeorev.2015.06.009","article-title":"Geochemical and mineralogical characteristics of weathered ore in the Dalucao REE deposit, Mianning\u2013Dechang REE Belt, western Sichuan Province, southwestern China","volume":"71","author":"Y Liu","year":"2015","journal-title":"Ore Geology Reviews"},{"key":"pone.0329138.ref038","doi-asserted-by":"crossref","first-page":"554","DOI":"10.1016\/j.oregeorev.2014.03.017","article-title":"Zircon U\u2013Pb ages of the Mianning\u2013Dechang syenites, Sichuan Province, southwestern China: Constraints on the giant REE mineralization belt and its regional geological setting","volume":"64","author":"Y Liu","year":"2015","journal-title":"Ore Geology Reviews"},{"key":"pone.0329138.ref039","doi-asserted-by":"crossref","first-page":"104173","DOI":"10.1016\/j.oregeorev.2021.104173","article-title":"Characteristics and genesis of ion adsorption type REE deposits in the weathering crusts of metamorphic rocks in Ningdu, Ganzhou, China","volume":"135","author":"Y Huang","year":"2021","journal-title":"Ore Geology Reviews"},{"key":"pone.0329138.ref040","doi-asserted-by":"crossref","first-page":"106011","DOI":"10.1016\/j.oregeorev.2024.106011","article-title":"Petrogenesis and REE mineralogical characteristics of Shitouping granites in southern Jiangxi Province: Implication for HREE mineralization in South China","volume":"168","author":"M-X Cao","year":"2024","journal-title":"Ore Geology Reviews"},{"key":"pone.0329138.ref041","doi-asserted-by":"crossref","first-page":"309","DOI":"10.1016\/j.oregeorev.2016.10.021","article-title":"Petrogenesis and mineralization of REE-rich granites in Qingxi and Guanxi, Nanling region, South China","volume":"81","author":"C He","year":"2017","journal-title":"Ore Geology Reviews"},{"issue":"1","key":"pone.0329138.ref042","doi-asserted-by":"crossref","first-page":"53","DOI":"10.1007\/s11631-009-0053-6","article-title":"Geochemical characteristics, cooling history and mineralization significance of Zhangtiantang pluton in South Jiangxi Province, P.R. China","volume":"29","author":"J Mao","year":"2010","journal-title":"Chin J Geochem"},{"issue":"10","key":"pone.0329138.ref043","first-page":"2457","article-title":"SHRIMP U-Pb zircon ages and major element, trace element and Nd-Sr isotope geochemical studies of a Neoproterozoic granitic complex in western Sichuan: Petrogenesis and tectonic significance","volume":"23","author":"G Chunli","year":"2007","journal-title":"Acta Petrologica Sinica"},{"issue":"8","key":"pone.0329138.ref044","first-page":"728","article-title":"Chemical speciation of elements in sediments and soils and their sequential extraction process","volume":"24","author":"Y Wang","year":"2005","journal-title":"Geological Bulletin of China"},{"key":"pone.0329138.ref045","doi-asserted-by":"crossref","first-page":"173","DOI":"10.1016\/j.chemgeo.2009.03.005","article-title":"Impact of atmospheric deposition, biogeochemical cycling and water\u2013mineral interaction on REE fractionation in acidic surface soils and soil water (the Strengbach case)","volume":"264","author":"P Stille","year":"2009","journal-title":"Chemical Geology"},{"issue":"1","key":"pone.0329138.ref046","doi-asserted-by":"crossref","first-page":"313","DOI":"10.1144\/GSL.SP.1989.042.01.19","article-title":"Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes","volume":"42","author":"-s. Sun S","year":"1989","journal-title":"SP"},{"issue":"5885","key":"pone.0329138.ref047","doi-asserted-by":"crossref","first-page":"715","DOI":"10.1038\/299715a0","article-title":"Early Proterozoic climates and plate motions inferred from major element chemistry of lutites","volume":"299","author":"HW Nesbitt","year":"1982","journal-title":"Nature"},{"key":"pone.0329138.ref048","doi-asserted-by":"crossref","first-page":"210","DOI":"10.1016\/j.chemgeo.2019.07.024","article-title":"Adsorption of REEs on kaolinite and halloysite: A link to the REE distribution on clays in the weathering crust of granite","volume":"525","author":"M Yang","year":"2019","journal-title":"Chemical Geology"},{"issue":"1","key":"pone.0329138.ref049","doi-asserted-by":"crossref","first-page":"92","DOI":"10.2138\/am-2020-7061","article-title":"The role of clay minerals in formation of the regolith-hosted heavy rare earth element deposits","volume":"105","author":"MYH Li","year":"2020","journal-title":"American 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Chen","year":"2023","journal-title":"Minerals"},{"issue":"1","key":"pone.0329138.ref053","doi-asserted-by":"crossref","first-page":"63","DOI":"10.1180\/minmag.2016.080.051","article-title":"An overview of rare-earth recovery by ion-exchange leaching from ion-adsorption clays of various origins","volume":"80","author":"GA Moldoveanu","year":"2016","journal-title":"Mineral mag"},{"key":"pone.0329138.ref054","doi-asserted-by":"crossref","first-page":"103120","DOI":"10.1016\/j.oregeorev.2019.103120","article-title":"Enrichment of ion-exchangeable rare earth elements by felsic volcanic rock weathering in South China: Genetic mechanism and formation preference","volume":"114","author":"W Fu","year":"2019","journal-title":"Ore Geology Reviews"},{"key":"pone.0329138.ref055","doi-asserted-by":"crossref","first-page":"79","DOI":"10.1007\/s11104-023-06177-2","article-title":"The role of root carboxylate release on rare earth element (hyper)accumulation in plants \u2013 a biogeochemical 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Galbarczyk-Gasiorowska","year":"2010","journal-title":"Acta Geologica Polonica"},{"issue":"4","key":"pone.0329138.ref059","doi-asserted-by":"crossref","first-page":"353","DOI":"10.3390\/min10040353","article-title":"Grain Size Distribution and Clay Mineral Distinction of Rare Earth Ore through Different Methods","volume":"10","author":"L Chen","year":"2020","journal-title":"Minerals"},{"issue":"1","key":"pone.0329138.ref060","doi-asserted-by":"crossref","first-page":"16216","DOI":"10.1038\/s41598-024-67134-2","article-title":"Impact of particle size and associated minerals on rare earth desorption and incorporation mechanisms in a South American ion-adsorption clay","volume":"14","author":"L Ding","year":"2024","journal-title":"Sci Rep"},{"issue":"9","key":"pone.0329138.ref061","doi-asserted-by":"crossref","first-page":"1115","DOI":"10.2475\/ajs.295.9.1115","article-title":"Crystal chemistry of kaolinite and Fe-Mn oxides: relation with formation conditions of low temperature systems","volume":"295","author":"J-P Muller","year":"1995","journal-title":"American Journal of Science"},{"issue":"2","key":"pone.0329138.ref062","doi-asserted-by":"crossref","first-page":"210","DOI":"10.3724\/EE.1672-9250.2024.52.026","article-title":"Geochemistry of Rare Earth Elements in a Dolomite Weathered Soil Profilein Guangxi, China","volume":"53","author":"W Lu","year":"2024","journal-title":"EE"},{"key":"pone.0329138.ref063","doi-asserted-by":"crossref","first-page":"65","DOI":"10.1016\/j.oregeorev.2009.03.001","article-title":"The Himalayan Mianning\u2013Dechang REE belt associated with carbonatite\u2013alkaline complexes, eastern Indo-Asian collision zone, SW China","volume":"36","author":"Z Hou","year":"2009","journal-title":"Ore Geology Reviews"},{"key":"pone.0329138.ref064","doi-asserted-by":"crossref","first-page":"105446","DOI":"10.1016\/j.oregeorev.2023.105446","article-title":"Review of rare earth element (REE) adsorption on and desorption from clay minerals: 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