Mineralogy, geochemistry and origin of karst bauxite deposits from the Reserva Fiscal Ávila, SW Dominican Republic

Domínguez-Carretero, Diego|||0000-0002-1089-0962; Villanova-de-Benavent, Cristina|||0000-0002-3973-2271; Torró, Lisard; Pujol-Solà, Núria|||0000-0001-6378-6811; Bover-Arnal, Telm|||0000-0002-5599-3711; Mestre, Àngel; Aiglsperger, Thomas|||0000-0002-1298-0320; Ramírez, Australia|||0000-0003-1315-6592; Rodríguez, Jesús; Espaillat, Julio; Proenza, Joaquín A.|||0000-0001-8738-7305

Mineralogy, geochemistry and origin of karst bauxite deposits from the Reserva Fiscal Ávila, SW Dominican Republic

The energy transition, which aims to reduce carbon emissions and to slow down climate change, demands an ever-increasing supply of the so-called "critical metals". Rare-earth Elements and Yttrium (REY) are among the most critical metals, as they are indispensable in most technologies assoc...

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Autores:	Domínguez-Carretero, Diego\|\|\|0000-0002-1089-0962, Villanova-de-Benavent, Cristina\|\|\|0000-0002-3973-2271, Torró, Lisard, Pujol-Solà, Núria\|\|\|0000-0001-6378-6811, Bover-Arnal, Telm\|\|\|0000-0002-5599-3711, Mestre, Àngel, Aiglsperger, Thomas\|\|\|0000-0002-1298-0320, Ramírez, Australia\|\|\|0000-0003-1315-6592, Rodríguez, Jesús, Espaillat, Julio, Proenza, Joaquín A.\|\|\|0000-0001-8738-7305
Tipo de recurso:	artículo
Fecha de publicación:	2025
País:	España
Institución:	Universitat Autònoma de Barcelona
Repositorio:	Dipòsit Digital de Documents de la UAB
Idioma:	inglés
OAI Identifier:	oai:ddd.uab.cat:311392
Acceso en línea:	https://ddd.uab.cat/record/311392 https://dx.doi.org/urn:doi:10.1344/GeologicaActa2025.23.9
Access Level:	acceso abierto
Palabra clave:	Karst bauxite Critical metals Rare-earth elements and yttrium (rey) Dominican republic Caribbean

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spelling	Mineralogy, geochemistry and origin of karst bauxite deposits from the Reserva Fiscal Ávila, SW Dominican RepublicDomínguez-Carretero, Diego\|\|\|0000-0002-1089-0962Villanova-de-Benavent, Cristina\|\|\|0000-0002-3973-2271Torró, LisardPujol-Solà, Núria\|\|\|0000-0001-6378-6811Bover-Arnal, Telm\|\|\|0000-0002-5599-3711Mestre, ÀngelAiglsperger, Thomas\|\|\|0000-0002-1298-0320Ramírez, Australia\|\|\|0000-0003-1315-6592Rodríguez, JesúsEspaillat, JulioProenza, Joaquín A.\|\|\|0000-0001-8738-7305Karst bauxiteCritical metalsRare-earth elements and yttrium (rey)Dominican republicCaribbeanThe energy transition, which aims to reduce carbon emissions and to slow down climate change, demands an ever-increasing supply of the so-called "critical metals". Rare-earth Elements and Yttrium (REY) are among the most critical metals, as they are indispensable in most technologies associated with the generation and storage of renewable energy. In recent years there has been a growing interest in the potential of karst bauxites as non-conventional sources of REY and other critical metals such as Sc and Ga. The Sierra de Bahoruco (SW Dominican Republic) contains the most REY-enriched karst bauxites globally. In view of the high potential for hosting important REY contents, the Dominican Republic government has declared the Reserva Fiscal Ávila (RFA), a state-owned area within the Sierra de Bahoruco for assessment and exploration of its REY resources. In this study, we present the first data on the mineralogy and composition of bauxitic rocks from the RFA. The bauxitic deposits comprise clayey bauxites and Fe-rich bauxites that are composed predominantly of Al-oxyhydroxides (gibbsite, boehmite and nordstrandite), kaolinite and Fe-oxyhydroxides. The bauxites are enriched in REY, with a median value of 1,310ppm and up to 2,542ppm, with a consistent enrichment in light REE (LREE) and Y compared to middle (MREE) and heavy REE (HREE). The positive correlation between the contents of REY and Th, and negative correlation with K, makes gamma-ray spectrometry an appropriate tool for the exploration. In addition, bauxitic rocks from the RFA contain significant Sc (up to 105ppm) and Ga (up to 54ppm) contents, and their extraction could potentially represent a substantial economic surplus to the revenue generated solely from the aluminum production. 22025-01-0120252025-01-01Articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/311392https://dx.doi.org/urn:doi:10.1344/GeologicaActa2025.23.9reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengMinisterio de Ciencia, Innovación y Universidades https://doi.org/10.13039/100014440 PID2019-105625RB-C21Ministerio de Ciencia, Innovación y Universidades https://doi.org/10.13039/100014440 PID2023-147788OB-I00Agència de Gestió d'Ajuts Universitaris i de Recerca https://doi.org/10.13039/501100003030 2021/SGR-00239open accesshttp://purl.org/coar/access_right/c_abf2Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, sempre i quan aquestes es distribueixin sota la mateixa llicència que regula l'obra original i es reconegui l'autoria.https://creativecommons.org/licenses/by-sa/4.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:3113922026-06-06T12:50:31Z
dc.title.none.fl_str_mv	Mineralogy, geochemistry and origin of karst bauxite deposits from the Reserva Fiscal Ávila, SW Dominican Republic
title	Mineralogy, geochemistry and origin of karst bauxite deposits from the Reserva Fiscal Ávila, SW Dominican Republic
spellingShingle	Mineralogy, geochemistry and origin of karst bauxite deposits from the Reserva Fiscal Ávila, SW Dominican Republic Domínguez-Carretero, Diego\|\|\|0000-0002-1089-0962 Karst bauxite Critical metals Rare-earth elements and yttrium (rey) Dominican republic Caribbean
title_short	Mineralogy, geochemistry and origin of karst bauxite deposits from the Reserva Fiscal Ávila, SW Dominican Republic
title_full	Mineralogy, geochemistry and origin of karst bauxite deposits from the Reserva Fiscal Ávila, SW Dominican Republic
title_fullStr	Mineralogy, geochemistry and origin of karst bauxite deposits from the Reserva Fiscal Ávila, SW Dominican Republic
title_full_unstemmed	Mineralogy, geochemistry and origin of karst bauxite deposits from the Reserva Fiscal Ávila, SW Dominican Republic
title_sort	Mineralogy, geochemistry and origin of karst bauxite deposits from the Reserva Fiscal Ávila, SW Dominican Republic
dc.creator.none.fl_str_mv	Domínguez-Carretero, Diego\|\|\|0000-0002-1089-0962 Villanova-de-Benavent, Cristina\|\|\|0000-0002-3973-2271 Torró, Lisard Pujol-Solà, Núria\|\|\|0000-0001-6378-6811 Bover-Arnal, Telm\|\|\|0000-0002-5599-3711 Mestre, Àngel Aiglsperger, Thomas\|\|\|0000-0002-1298-0320 Ramírez, Australia\|\|\|0000-0003-1315-6592 Rodríguez, Jesús Espaillat, Julio Proenza, Joaquín A.\|\|\|0000-0001-8738-7305
author	Domínguez-Carretero, Diego\|\|\|0000-0002-1089-0962
author_facet	Domínguez-Carretero, Diego\|\|\|0000-0002-1089-0962 Villanova-de-Benavent, Cristina\|\|\|0000-0002-3973-2271 Torró, Lisard Pujol-Solà, Núria\|\|\|0000-0001-6378-6811 Bover-Arnal, Telm\|\|\|0000-0002-5599-3711 Mestre, Àngel Aiglsperger, Thomas\|\|\|0000-0002-1298-0320 Ramírez, Australia\|\|\|0000-0003-1315-6592 Rodríguez, Jesús Espaillat, Julio Proenza, Joaquín A.\|\|\|0000-0001-8738-7305
author_role	author
author2	Villanova-de-Benavent, Cristina\|\|\|0000-0002-3973-2271 Torró, Lisard Pujol-Solà, Núria\|\|\|0000-0001-6378-6811 Bover-Arnal, Telm\|\|\|0000-0002-5599-3711 Mestre, Àngel Aiglsperger, Thomas\|\|\|0000-0002-1298-0320 Ramírez, Australia\|\|\|0000-0003-1315-6592 Rodríguez, Jesús Espaillat, Julio Proenza, Joaquín A.\|\|\|0000-0001-8738-7305
author2_role	author author author author author author author author author author
dc.subject.none.fl_str_mv	Karst bauxite Critical metals Rare-earth elements and yttrium (rey) Dominican republic Caribbean
topic	Karst bauxite Critical metals Rare-earth elements and yttrium (rey) Dominican republic Caribbean
description	The energy transition, which aims to reduce carbon emissions and to slow down climate change, demands an ever-increasing supply of the so-called "critical metals". Rare-earth Elements and Yttrium (REY) are among the most critical metals, as they are indispensable in most technologies associated with the generation and storage of renewable energy. In recent years there has been a growing interest in the potential of karst bauxites as non-conventional sources of REY and other critical metals such as Sc and Ga. The Sierra de Bahoruco (SW Dominican Republic) contains the most REY-enriched karst bauxites globally. In view of the high potential for hosting important REY contents, the Dominican Republic government has declared the Reserva Fiscal Ávila (RFA), a state-owned area within the Sierra de Bahoruco for assessment and exploration of its REY resources. In this study, we present the first data on the mineralogy and composition of bauxitic rocks from the RFA. The bauxitic deposits comprise clayey bauxites and Fe-rich bauxites that are composed predominantly of Al-oxyhydroxides (gibbsite, boehmite and nordstrandite), kaolinite and Fe-oxyhydroxides. The bauxites are enriched in REY, with a median value of 1,310ppm and up to 2,542ppm, with a consistent enrichment in light REE (LREE) and Y compared to middle (MREE) and heavy REE (HREE). The positive correlation between the contents of REY and Th, and negative correlation with K, makes gamma-ray spectrometry an appropriate tool for the exploration. In addition, bauxitic rocks from the RFA contain significant Sc (up to 105ppm) and Ga (up to 54ppm) contents, and their extraction could potentially represent a substantial economic surplus to the revenue generated solely from the aluminum production.
publishDate	2025
dc.date.none.fl_str_mv	2 2025-01-01 2025 2025-01-01
dc.type.none.fl_str_mv	Article http://purl.org/coar/resource_type/c_6501 VoR http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv	info:eu-repo/semantics/article
format	article
dc.identifier.none.fl_str_mv	https://ddd.uab.cat/record/311392 https://dx.doi.org/urn:doi:10.1344/GeologicaActa2025.23.9
url	https://ddd.uab.cat/record/311392 https://dx.doi.org/urn:doi:10.1344/GeologicaActa2025.23.9
dc.language.none.fl_str_mv	Inglés eng
language_invalid_str_mv	Inglés
language	eng
dc.relation.none.fl_str_mv	Ministerio de Ciencia, Innovación y Universidades https://doi.org/10.13039/100014440 PID2019-105625RB-C21 Ministerio de Ciencia, Innovación y Universidades https://doi.org/10.13039/100014440 PID2023-147788OB-I00 Agència de Gestió d'Ajuts Universitaris i de Recerca https://doi.org/10.13039/501100003030 2021/SGR-00239
dc.rights.none.fl_str_mv	open access http://purl.org/coar/access_right/c_abf2 https://creativecommons.org/licenses/by-sa/4.0/
dc.rights.openaire.fl_str_mv	info:eu-repo/semantics/openAccess
rights_invalid_str_mv	open access http://purl.org/coar/access_right/c_abf2 https://creativecommons.org/licenses/by-sa/4.0/
eu_rights_str_mv	openAccess
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dc.source.none.fl_str_mv	reponame:Dipòsit Digital de Documents de la UAB instname:Universitat Autònoma de Barcelona
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Mineralogy, geochemistry and origin of karst bauxite deposits from the Reserva Fiscal Ávila, SW Dominican Republic

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