Geochemistry and Mineralogy of Rare Earth Elements (REE) in Bauxitic Ores of the Catalan Coastal Range, NE Spain

Karst bauxite deposits are currently investigated as a new resource for rare earth elements (REE) in order to avoid present and future supply shortfalls of these critical metals. The present work focuses on the geochemistry and mineralogy of the REE in karst bauxite deposits of the Catalan Coastal R...

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Autores: Reinhardt, Nils, Proenza Fernández, Joaquín Antonio, Villanova de Benavent, Cristina, Aiglsperger, Thomas Hans, Bover-Arnal, Telm, Torró i Abat, Lisard, Salas, Ramon (Salas Roig), Dziggel, Annika
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2018
País:España
Institución:Universidad de Barcelona
Repositorio:Dipòsit Digital de la UB
OAI Identifier:oai:diposit.ub.edu:2445/126917
Acceso en línea:https://hdl.handle.net/2445/126917
Access Level:acceso abierto
Palabra clave:Mineralogia
Geoquímica
Catalunya
Metalls de terres rares
Mineralogy
Geochemistry
Catalonia
Rare earth metals
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spelling Geochemistry and Mineralogy of Rare Earth Elements (REE) in Bauxitic Ores of the Catalan Coastal Range, NE SpainReinhardt, NilsProenza Fernández, Joaquín AntonioVillanova de Benavent, CristinaAiglsperger, Thomas HansBover-Arnal, TelmTorró i Abat, LisardSalas, Ramon (Salas Roig)Dziggel, AnnikaMineralogiaGeoquímicaCatalunyaMetalls de terres raresMineralogyGeochemistryCataloniaRare earth metalsKarst bauxite deposits are currently investigated as a new resource for rare earth elements (REE) in order to avoid present and future supply shortfalls of these critical metals. The present work focuses on the geochemistry and mineralogy of the REE in karst bauxite deposits of the Catalan Coastal Range (CCR), NE-Spain. It is revealed that the studied bauxitic ores have a dominant breccia and local ooido-pisoidic and pelitomorphic texture. The bauxitic ores are mostly composed of kaolinite and hematite, as well as of lesser amounts of boehmite, diaspore, rutile and calcite. The mineralogy and major element composition indicate incomplete bauxitization of an argillaceous precursor material possibly derived from the erosion of the Mesozoic Ebro massif paleo-high. The studied bauxites are characterized by åREE (including Sc, Y) between 286 and 820 ppm (av. 483 ppm) and light REE to heavy REE (LREE/HREE) ratios up to 10.6. REE are mainly concentrated in phosphate minerals, identified as monazite-(Ce) and xenotime-(Y) of detrital origin and unidentified REE-phosphates of a possible authigenic origin. REE remobilization presumably took place under acidic conditions, whereas REE entrapment in the form of precipitation of authigenic rare earth minerals from percolating solutions was related to neutral to slightly alkaline conditions. During the bauxitization process no significant REE fractionation took place and the REE distribution pattern of the bauxitic ores was governed by the REE budget of the precursor material. Finally, adsorption as a main REE scavenging mechanism in the studied CCR bauxite deposits should not be considered, since the presented data did not reveal significant REE contents in Fe-and Mn-oxyhydroxides and clay minerals.MDPI2018info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://hdl.handle.net/2445/126917Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)reponame:Dipòsit Digital de la UBinstname:Universidad de BarcelonaInglésReproducció del document publicat a: https://doi.org/10.3390/min8120562Minerals, 2018, vol. 8, num. 12, p. 562https://doi.org/10.3390/min8120562cc-by (c) Reinhardt, Nils et al., 2018http://creativecommons.org/licenses/by/3.0/esinfo:eu-repo/semantics/openAccessoai:diposit.ub.edu:2445/1269172026-05-27T06:46:51Z
dc.title.none.fl_str_mv Geochemistry and Mineralogy of Rare Earth Elements (REE) in Bauxitic Ores of the Catalan Coastal Range, NE Spain
title Geochemistry and Mineralogy of Rare Earth Elements (REE) in Bauxitic Ores of the Catalan Coastal Range, NE Spain
spellingShingle Geochemistry and Mineralogy of Rare Earth Elements (REE) in Bauxitic Ores of the Catalan Coastal Range, NE Spain
Reinhardt, Nils
Mineralogia
Geoquímica
Catalunya
Metalls de terres rares
Mineralogy
Geochemistry
Catalonia
Rare earth metals
title_short Geochemistry and Mineralogy of Rare Earth Elements (REE) in Bauxitic Ores of the Catalan Coastal Range, NE Spain
title_full Geochemistry and Mineralogy of Rare Earth Elements (REE) in Bauxitic Ores of the Catalan Coastal Range, NE Spain
title_fullStr Geochemistry and Mineralogy of Rare Earth Elements (REE) in Bauxitic Ores of the Catalan Coastal Range, NE Spain
title_full_unstemmed Geochemistry and Mineralogy of Rare Earth Elements (REE) in Bauxitic Ores of the Catalan Coastal Range, NE Spain
title_sort Geochemistry and Mineralogy of Rare Earth Elements (REE) in Bauxitic Ores of the Catalan Coastal Range, NE Spain
dc.creator.none.fl_str_mv Reinhardt, Nils
Proenza Fernández, Joaquín Antonio
Villanova de Benavent, Cristina
Aiglsperger, Thomas Hans
Bover-Arnal, Telm
Torró i Abat, Lisard
Salas, Ramon (Salas Roig)
Dziggel, Annika
author Reinhardt, Nils
author_facet Reinhardt, Nils
Proenza Fernández, Joaquín Antonio
Villanova de Benavent, Cristina
Aiglsperger, Thomas Hans
Bover-Arnal, Telm
Torró i Abat, Lisard
Salas, Ramon (Salas Roig)
Dziggel, Annika
author_role author
author2 Proenza Fernández, Joaquín Antonio
Villanova de Benavent, Cristina
Aiglsperger, Thomas Hans
Bover-Arnal, Telm
Torró i Abat, Lisard
Salas, Ramon (Salas Roig)
Dziggel, Annika
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Mineralogia
Geoquímica
Catalunya
Metalls de terres rares
Mineralogy
Geochemistry
Catalonia
Rare earth metals
topic Mineralogia
Geoquímica
Catalunya
Metalls de terres rares
Mineralogy
Geochemistry
Catalonia
Rare earth metals
description Karst bauxite deposits are currently investigated as a new resource for rare earth elements (REE) in order to avoid present and future supply shortfalls of these critical metals. The present work focuses on the geochemistry and mineralogy of the REE in karst bauxite deposits of the Catalan Coastal Range (CCR), NE-Spain. It is revealed that the studied bauxitic ores have a dominant breccia and local ooido-pisoidic and pelitomorphic texture. The bauxitic ores are mostly composed of kaolinite and hematite, as well as of lesser amounts of boehmite, diaspore, rutile and calcite. The mineralogy and major element composition indicate incomplete bauxitization of an argillaceous precursor material possibly derived from the erosion of the Mesozoic Ebro massif paleo-high. The studied bauxites are characterized by åREE (including Sc, Y) between 286 and 820 ppm (av. 483 ppm) and light REE to heavy REE (LREE/HREE) ratios up to 10.6. REE are mainly concentrated in phosphate minerals, identified as monazite-(Ce) and xenotime-(Y) of detrital origin and unidentified REE-phosphates of a possible authigenic origin. REE remobilization presumably took place under acidic conditions, whereas REE entrapment in the form of precipitation of authigenic rare earth minerals from percolating solutions was related to neutral to slightly alkaline conditions. During the bauxitization process no significant REE fractionation took place and the REE distribution pattern of the bauxitic ores was governed by the REE budget of the precursor material. Finally, adsorption as a main REE scavenging mechanism in the studied CCR bauxite deposits should not be considered, since the presented data did not reveal significant REE contents in Fe-and Mn-oxyhydroxides and clay minerals.
publishDate 2018
dc.date.none.fl_str_mv 2018
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/2445/126917
url https://hdl.handle.net/2445/126917
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a: https://doi.org/10.3390/min8120562
Minerals, 2018, vol. 8, num. 12, p. 562
https://doi.org/10.3390/min8120562
dc.rights.none.fl_str_mv cc-by (c) Reinhardt, Nils et al., 2018
http://creativecommons.org/licenses/by/3.0/es
info:eu-repo/semantics/openAccess
rights_invalid_str_mv cc-by (c) Reinhardt, Nils et al., 2018
http://creativecommons.org/licenses/by/3.0/es
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv Articles publicats en revistes (Mineralogia, Petrologia i Geologia Aplicada)
reponame:Dipòsit Digital de la UB
instname:Universidad de Barcelona
instname_str Universidad de Barcelona
reponame_str Dipòsit Digital de la UB
collection Dipòsit Digital de la UB
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,198674

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