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2023

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cc-by (c) Tauler, T. et al., 2023
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/208243

Geochemistry and mineralogy of the clay-type Ni-laterite de-posit of San Felipe (Camagüey, Cuba)

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https://doi.org/https://doi.org/10.3390/min13101281

Resum

The Ni-laterite deposit at the San Felipe plateau, located 30 km northwest of Camagüey, in central Cuba, is the best example of a clay-type deposit in the Caribbean region. San Felipe resulted from the weathering of mantle peridotites of the Cretaceous Camagüey ophiolites. In this study, a geochemical and mineralogical characterization of two profiles (83 and 84) from the San Felipe deposit has been performed by XRF, ICP-MS, quantitative XRPD, oriented aggregate mount XRD, SEM, FE-SEM, and EMPA. Core 83, with a length of 23 m and drilled in the central part of the plateau, presents a notable concentration of cryptocrystalline quartz fragments and a rather poor content of NiO, averaging 0.87 wt.%. Core 84, which is 12 m long and drilled at the border of the plateau, lacks silica fragments and presents a higher NiO content, averaging 1.79 wt.%. The smectite structural formulae reveal that they evolve from trioctahedral to dioctahedral towards the top of the laterite profiles. Quantitative XRD analyses indicate that smectite is a dominant Ni-bearing phase, accompanied by serpentine and minor chlorite. Serpentine, as smectite, is enriched in the less soluble elements Fe3+, Al, and Ni towards the top of the profiles. Core 83 seems to have been affected by collapses and replenishments, whereas core 84 may have remained undisturbed.

Matèries

Geoquímica, Mineralogia, Laterita, Níquel, Jaciments minerals, Cuba

Matèries (anglès)

Geochemistry, Mineralogy, Laterite, Nickel, Mineral deposits, Cuba

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Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)

Citació

TAULER I FERRÉ, Esperança, et al. Geochemistry and mineralogy of the clay-type Ni-laterite de-posit of San Felipe (Camagüey, Cuba). Minerals. 2023. Vol. 13, num. 10. ISSN 2075-163X. [consulted: 4 of August of 2026]. Available at: https://hdl.handle.net/2445/208243

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