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Exploración regional con analizadores portátiles de fluorescencia de rayos X (FRXp) de la región de Giraúl (Namibe, SW Angola) [Resumo]
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Abstract(s)
RESUMEN: Durante el Proyecto PLANAGEO se llevó a cabo una importante campaña de exploración geoquímica en la región de Giraúl. Los trabajos geoquímicos regionales han consistido en el análisis in situ de
muestras de rocas, suelos y sedimentos de corriente mediante analizadores portátiles de fluorescencia de
rayos X (FRXp), centrándose en la zona del Campo Pegmatítico de Giraúl, uno de los campos pegmatíticos más extensos del mundo, y también en zonas cercanas con posible interés en minerales críticos. Estos trabajos han permitido definir tres zonas de especial interés: a) el Campo Pegmatítico de Giraúl, donde se han registrado importantes concentraciones de Nb-Ta y donde se están realizando campañas de exploración de Li-Be; b) las formaciones máficas de los metasedimentos del Grupo Namibe y otras intrusiones básicas Paleoproterozoicas, que presentan un potencial interés para metales base (Cr-Ni-Co)-Cu; y c) las formaciones volcánicas cretácicas de la Cuenca de Namibe, que presentan potencial interés para Fe-Ti (V) (Martín-Méndez et al. 2022a, b).
ABSTRACT: A major geochemical exploration campaign was carried out in the Giraúl region during the PLANAGEO project. The regional geochemical works consisted of in situ analysis of rock, soil and stream sediment samples using portable X-ray fluorescence (pXRF) analysers, focusing on the area of the Giraúl Pegmatitic Field, a world significant Li deposit, as well as in adjacent areas with potential for critical element mineralisation. This work has enabled us to define three areas of special interest: (a) the Giraúl Pegmatitic Field, where significant anomalous concentrations of Nb-Ta have been registered, and is currently undergoing detailed Li-Be exploration campaigns; (b) the mafic formations of the Namibe Group metasediments and other basic Palaeoproterozoic intrusions, which show potential interest for base metal (Cr-Ni-Co)-Cu exploration; and (c) the Cretaceous volcanic formations of the Namibe Basin, which hold potential interest for Fe-Ti (V) (Martín-Méndez et al. 2022a, b).
ABSTRACT: A major geochemical exploration campaign was carried out in the Giraúl region during the PLANAGEO project. The regional geochemical works consisted of in situ analysis of rock, soil and stream sediment samples using portable X-ray fluorescence (pXRF) analysers, focusing on the area of the Giraúl Pegmatitic Field, a world significant Li deposit, as well as in adjacent areas with potential for critical element mineralisation. This work has enabled us to define three areas of special interest: (a) the Giraúl Pegmatitic Field, where significant anomalous concentrations of Nb-Ta have been registered, and is currently undergoing detailed Li-Be exploration campaigns; (b) the mafic formations of the Namibe Group metasediments and other basic Palaeoproterozoic intrusions, which show potential interest for base metal (Cr-Ni-Co)-Cu exploration; and (c) the Cretaceous volcanic formations of the Namibe Basin, which hold potential interest for Fe-Ti (V) (Martín-Méndez et al. 2022a, b).
Description
Keywords
Critical elements Exploration Pegmatites Geochemistry Angola
Pedagogical Context
Citation
Martín-Méndez, I., Merino-Martínez, E., Batista, M.J., Feria, M.C., Prazeres, C., Gumiel, J.C., Iglesias-Martinez, M., Fernández, J., Chinchilla-Benavides, D., Gutiérrez-Medina, M., Buzzi-Marcos, J. & Manuel, J. (2024) Exploración regional con analizadores portátiles de fluorescencia de rayos X (FRXp) de la región de Giraúl (Namibe, SW Angola). In: Geo-Temas, vol. 20, XI Congresso Geológico de España, Ávila, España, 2-6 July, 2024, p. 1345