{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T02:59:11Z","timestamp":1760151551096,"version":"build-2065373602"},"reference-count":96,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2022,3,29]],"date-time":"2022-03-29T00:00:00Z","timestamp":1648512000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100011011","name":"Junta de Andaluc\u00eda","doi-asserted-by":"publisher","award":["UHU-1260298"],"award-info":[{"award-number":["UHU-1260298"]}],"id":[{"id":"10.13039\/501100011011","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Minerals"],"abstract":"<jats:p>The Tinto and Odiel rivers (SW Spain) drain from a vast sulfide mining district and join at a 20-km-long estuary that enters the Atlantic Ocean. In this work, the contents of rare earth elements (REE) and fractionation in Neogene\u2013Holocene sediment cores from La Fontanilla cove (Tinto estuary) were studied. The sediments were collected from a depth of 18 m at different distances from the recent river flow and were analyzed for new information on the temporal development of the REE load in the sediment column. Results show that the \u2211 REE is higher in the finer sediments and during periods of mining activity from prehistoric to recent times. Marine influence appears to increase the light REE (LREE) relative to the heavy REE (HREE). The REE patterns of these estuarine sediments show convex curvatures in the MREE relative to the LREE and HREE, indicating the presence of acid-mixing processes between the fluvial waters affected by acid mine drainage (AMD) and seawater, as well as the precipitation of poorly crystalline mineral phases. Significant positive Eu anomalies were found in ebb-tide channels and marsh deposits, which can reflect the mineralogical composition and\/or a strong localized salinity gradient combined with organic matter degradation. Sedimentological characteristics of the deposits appear to play the main role in accumulation and fractionation of the REE.<\/jats:p>","DOI":"10.3390\/min12040417","type":"journal-article","created":{"date-parts":[[2022,3,29]],"date-time":"2022-03-29T21:41:30Z","timestamp":1648590090000},"page":"417","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["REE Geochemistry of Neogene\u2013Holocene Sediments of La Fontanilla Cove (Tinto Estuary, SW Spain)"],"prefix":"10.3390","volume":"12","author":[{"given":"Maria Isabel","family":"Prud\u00eancio","sequence":"first","affiliation":[{"name":"Centro de Ci\u00eancias e Tecnologias Nucleares (C2TN), Instituto Superior T\u00e9cnico, EN 10 (km 139.7), 2695-066 Bobadela, Portugal"},{"name":"Departamento de Engenharia e Ci\u00eancias Nucleares (DECN), Instituto Superior T\u00e9cnico, Universidade de Lisboa, EN 10 (km 139.7), 2695-066 Bobadela, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8581-6823","authenticated-orcid":false,"given":"Francisco","family":"Ruiz","sequence":"additional","affiliation":[{"name":"Departamento de Ciencias de la Tierra, Universidad de Huelva, Avda. Tres de Marzo, s\/n, 21071 Huelva, Spain"},{"name":"Centro de Investigaci\u00f3n en Patrimonio Hist\u00f3rico, Cultural y Natural (CIPHCN), Facultad de Humanidades, Universidad de Huelva, Avda. Tres de Marzo s\/n, 21071 Huelva, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6239-5456","authenticated-orcid":false,"given":"Rosa","family":"Marques","sequence":"additional","affiliation":[{"name":"Centro de Ci\u00eancias e Tecnologias Nucleares (C2TN), Instituto Superior T\u00e9cnico, EN 10 (km 139.7), 2695-066 Bobadela, Portugal"},{"name":"Departamento de Engenharia e Ci\u00eancias Nucleares (DECN), Instituto Superior T\u00e9cnico, Universidade de Lisboa, EN 10 (km 139.7), 2695-066 Bobadela, Portugal"}]},{"given":"Maria Isabel","family":"Dias","sequence":"additional","affiliation":[{"name":"Centro de Ci\u00eancias e Tecnologias Nucleares (C2TN), Instituto Superior T\u00e9cnico, EN 10 (km 139.7), 2695-066 Bobadela, Portugal"},{"name":"Departamento de Engenharia e Ci\u00eancias Nucleares (DECN), Instituto Superior T\u00e9cnico, Universidade de Lisboa, EN 10 (km 139.7), 2695-066 Bobadela, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9475-3307","authenticated-orcid":false,"given":"Joaqu\u00edn Rodr\u00edguez","family":"Vidal","sequence":"additional","affiliation":[{"name":"Departamento de Ciencias de la Tierra, Universidad de Huelva, Avda. Tres de Marzo, s\/n, 21071 Huelva, Spain"},{"name":"Centro de Investigaci\u00f3n en Patrimonio Hist\u00f3rico, Cultural y Natural (CIPHCN), Facultad de Humanidades, Universidad de Huelva, Avda. Tres de Marzo s\/n, 21071 Huelva, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8652-2923","authenticated-orcid":false,"given":"Ana Lu\u00edsa","family":"Rodrigues","sequence":"additional","affiliation":[{"name":"Centro de Ci\u00eancias e Tecnologias Nucleares (C2TN), Instituto Superior T\u00e9cnico, EN 10 (km 139.7), 2695-066 Bobadela, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1381-2476","authenticated-orcid":false,"given":"Luis Miguel","family":"C\u00e1ceres","sequence":"additional","affiliation":[{"name":"Departamento de Ciencias de la Tierra, Universidad de Huelva, Avda. Tres de Marzo, s\/n, 21071 Huelva, Spain"}]},{"given":"Mar\u00eda Luz","family":"Gonz\u00e1lez-Regalado","sequence":"additional","affiliation":[{"name":"Departamento de Ciencias de la Tierra, Universidad de Huelva, Avda. Tres de Marzo, s\/n, 21071 Huelva, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8841-1987","authenticated-orcid":false,"given":"Juan Manuel","family":"Mu\u00f1oz","sequence":"additional","affiliation":[{"name":"Departamento de Estad\u00edstica e Investigaci\u00f3n Operativa, Universidad de Sevilla, C\/Profesor Garc\u00eda Gonz\u00e1lez 1, 41012 Sevilla, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6706-440X","authenticated-orcid":false,"given":"Manuel","family":"Pozo","sequence":"additional","affiliation":[{"name":"Departamento de Geolog\u00eda y Geoqu\u00edmica, Universidad Aut\u00f3noma de Madrid, Avda. Francisco Tomas y Valiente 7, 28049 Madrid, Spain"}]},{"given":"Paula","family":"G\u00f3mez","sequence":"additional","affiliation":[{"name":"Departamento de Ciencias de la Tierra, Universidad de Huelva, Avda. Tres de Marzo, s\/n, 21071 Huelva, Spain"}]},{"given":"Antonio","family":"Toscano","sequence":"additional","affiliation":[{"name":"Departamento de Ciencias de la Tierra, Universidad de Huelva, Avda. Tres de Marzo, s\/n, 21071 Huelva, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1930-2650","authenticated-orcid":false,"given":"Manuel","family":"Abad","sequence":"additional","affiliation":[{"name":"Departamento de Biolog\u00eda y Geolog\u00eda, F\u00edsica y Qu\u00edmica Inorg\u00e1nica, ESCET, Universidad Rey Juan Carlos, 28933 M\u00f3stoles, Spain"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3805-2020","authenticated-orcid":false,"given":"Tatiana","family":"Izquierdo","sequence":"additional","affiliation":[{"name":"Departamento de Biolog\u00eda y Geolog\u00eda, F\u00edsica y Qu\u00edmica Inorg\u00e1nica, ESCET, Universidad Rey Juan Carlos, 28933 M\u00f3stoles, Spain"}]},{"given":"Marta","family":"Arroyo","sequence":"additional","affiliation":[{"name":"Departamento de Ciencias de la Tierra, Universidad de Huelva, Avda. Tres de Marzo, s\/n, 21071 Huelva, Spain"}]},{"given":"Ver\u00f3nica","family":"Romero","sequence":"additional","affiliation":[{"name":"Departamento de Ciencias de la Tierra, Universidad de Huelva, Avda. Tres de Marzo, s\/n, 21071 Huelva, Spain"}]},{"given":"Gabriel","family":"G\u00f3mez","sequence":"additional","affiliation":[{"name":"Departamento de Ciencias de la Tierra, Universidad de Huelva, Avda. Tres de Marzo, s\/n, 21071 Huelva, Spain"}]}],"member":"1968","published-online":{"date-parts":[[2022,3,29]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"855","DOI":"10.1016\/0016-7037(81)90115-0","article-title":"The equilibrium speciation of dissolved components in freshwater and seawater at 25 \u00b0C and 1 atm pressure","volume":"45","author":"Turner","year":"1981","journal-title":"Geochim. Cosmochim. 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