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Critical metals (REE, Sc, PGE) in Ni laterites from Cuba and the Dominican Republic
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SYSNO ASEP 0459700 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Critical metals (REE, Sc, PGE) in Ni laterites from Cuba and the Dominican Republic Author(s) Aiglsperger, T. (ES)
Proenza, J. A. (ES)
Lewis, J. F. (US)
Labrador, M. (ES)
Svojtka, Martin (GLU-S) SAI, RID, ORCID
Rojas-Purón, A. (CU)
Longo, F. (DO)
Ďurišová, Jana (GLU-S) RID, SAISource Title Ore Geology Reviews. - : Elsevier - ISSN 0169-1368
Roč. 73, March 01 (2016), s. 127-147Number of pages 21 s. Publication form Print - P Language eng - English Country NL - Netherlands Keywords Caribbean ; Cuba ; Dominican Republic ; Falcondo mining area ; Moa Bay mining area ; Ni laterite ; Platinum Group Elements ; Rare Earth Elements ; Scandium Subject RIV DB - Geology ; Mineralogy Institutional support GLU-S - RVO:67985831 UT WOS 000366787800008 EID SCOPUS 84946426724 DOI 10.1016/j.oregeorev.2015.10.010 Annotation Ni laterites are considered worthy targets for critical metals (CM) exploration as Rare Earth Elements (REE), Sc and platinum group elements (PGE) can be concentrated during weathering as a result of residual and secondary enrichment. In this contribution geochemical and mineralogical data of CM from two different nickel laterite types (i) from the Moa Bay mining area in Cuba (oxide type) and (ii) from the Falcondo mining area in the Dominican Republic (hydrous Mg silicate type) are presented. Emphasis is given on examining their potential to accumulate CM and on processes involved. Results show that CM are concentrated towards the surface in specific zones: (i) REE in clay minerals rich horizons and within zones composed of secondary Mn oxide(s), (ii) Sc within zones rich in secondary Fe and Mn bearing oxide(s) and (iii) PGE in zones with high concentrations of residual chromian spinel and secondary Fe and Mn bearing oxide(s) at upper levels of the Ni laterite profiles. Concentration factors involve (i) residual enrichment by intense weathering, (ii) mobilization of CM during changing Eh and pH conditions with subsequent reprecipitation at favourable geochemical barriers and (iii) interactions between biosphere and limonitic soils at highest levels of the profile (critical zone) with involved neoformation processes. Total contents of CM in both Ni laterite types are low when compared with conventional CM ore deposits but are of economic significance as CM have to be seen as cost inexpensive by-products during the Ni (+. Co) production. Innovative extraction methods currently under development are believed to boost the significance of Ni laterites as future unconventional CM ore deposits. Workplace Institute of Geology Contact Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Year of Publishing 2017
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