Počet záznamů: 1

Critical metals (REE, Sc, PGE) in Ni laterites from Cuba and the Dominican Republic

SYSNO ASEP	0459700
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	J - Článek v odborném periodiku
Poddruh J	Článek ve WOS
Název	Critical metals (REE, Sc, PGE) in Ni laterites from Cuba and the Dominican Republic
Tvůrce(i)	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, SAI}
Zdroj.dok.	Ore Geology Reviews. - : Elsevier - ISSN 0169-1368 Roč. 73, March 01 (2016), s. 127-147
Poč.str.	21 s.
Forma vydání	Tištěná - P
Jazyk dok.	eng - angličtina
Země vyd.	NL - Nizozemsko
Klíč. slova	Caribbean ; Cuba ; Dominican Republic ; Falcondo mining area ; Moa Bay mining area ; Ni laterite ; Platinum Group Elements ; Rare Earth Elements ; Scandium
Vědní obor RIV	DB - Geologie a mineralogie
Institucionální podpora	GLU-S - RVO:67985831
UT WOS	000366787800008
EID SCOPUS	84946426724
DOI	10.1016/j.oregeorev.2015.10.010
Anotace	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.
Pracoviště	Geologický ústav
Kontakt	Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272
Rok sběru	2017

Počet záznamů: 1