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Exploración de recursos minerales en el Proyecto PLANAGEO (Angola) [Resumo]
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Abstract(s)
RESUMEN: Una importante actividad desarrollada por el consorcio UTE-PLANAGEO (IGME/LNEG/Impulso) en el Proyecto PLANAGEO (2014-2022) fue el desarrollo de un programa específico de exploración
geológico-minera en detalle, denominado Cartas de Recursos Minerais Metálicos de Angola (CRMMA),
con el objetivo de definir áreas potenciales de exploración en recursos naturales en la región sur de Angola. Se seleccionaron 3 clusters que comprendían 39 cartas a escala 1:50.000 y que tenían interés para diferentes recursos minerales: i) Cluster 1: Au-Fe - Regiones de Cuíma-Samboto, Chipindo, Jamba y M´Popo-Tchamutete; ii) Cluster 2: ETR - Regiones de Catanda, Serra da Neve y Tchivira-Bonga; iii) Cluster 3: Cr-Ni-(EGP), Cu y Nb-Ta-Be - Regiones de Giraúl, Humpata y Chibia-Hamutenha. La metodología de trabajo se basó en el análisis geoquímico in situ mediante equipos portátiles de fluorescencia de rayos X (FRXp) y análisis químicos en laboratorio de muestras de rocas, sedimentos de corriente y suelos, además del estudio al microscopio de muestras de zonas mineralizadas. Finalmente, se realizaron estudios gravimétricos de detalle en diversos cuerpos máficos a ultramáficos, presumiblemente portadores de metales base, que complementaron los datos generados en la exploración aerogeofísica magnética/radiométrica regional realizada en el proyecto. La combinación de todas estas técnicas (geoquímica multielemental de FRXp y de laboratorio junto con la información geofísica y geológica) a partir del análisis factorial multidisciplinar permitió proponer zonas de potencial interés para la prospección mineral.
ABSTRACT: An important activity developed by the UTE-PLANAGEO consortium (IGME/LNEG/Impulso) in the PLANAGEO Project (2014-2022) was the development of a specific and detailed geological-mining exploration program, termed Cartas de Recursos Minerais Metálicos de Angola (CRMMA), with the objective of defining potential mineral resources exploration areas in SW Angola. Three clusters, comprising 39 different 1:50,000 scale geological sheets, were defined in order to explore different mineral resources: i) Cluster 1: Au-Fe - Cuíma-Samboto, Chipindo, Jamba and M'Popo-Tchamutete regions; ii) Cluster 2: REE - Catanda, Serra da Neve and Tchivira-Bonga regions; iii) Cluster 3: Cr-Ni-(PGE), Cu and Nb-Ta-Be - Giraúl, Humpata and Chibia-Hamutenha regions. The work methodology was based on the in situ geochemical analysis using portable X-ray fluorescence equipment (pXRF) and laboratory chemical analysis of rock, stream sediment and soil samples, in addition to petrographic study of samples from mineralised zones. Finally, detailed gravimetric studies were carried out on several mafic to ultramafic bodies, potentially host to base metals, complementing the data generated by the regional magnetic/radiometric aerogeophysical surveys carried out during the project. The combination of all these techniques (multi-elemental pXRF and laboratory geochemistry together with the geophysical and geological information) from the multidisciplinary factor analysis made it possible to propose areas of potential interest for mineral prospecting.
ABSTRACT: An important activity developed by the UTE-PLANAGEO consortium (IGME/LNEG/Impulso) in the PLANAGEO Project (2014-2022) was the development of a specific and detailed geological-mining exploration program, termed Cartas de Recursos Minerais Metálicos de Angola (CRMMA), with the objective of defining potential mineral resources exploration areas in SW Angola. Three clusters, comprising 39 different 1:50,000 scale geological sheets, were defined in order to explore different mineral resources: i) Cluster 1: Au-Fe - Cuíma-Samboto, Chipindo, Jamba and M'Popo-Tchamutete regions; ii) Cluster 2: REE - Catanda, Serra da Neve and Tchivira-Bonga regions; iii) Cluster 3: Cr-Ni-(PGE), Cu and Nb-Ta-Be - Giraúl, Humpata and Chibia-Hamutenha regions. The work methodology was based on the in situ geochemical analysis using portable X-ray fluorescence equipment (pXRF) and laboratory chemical analysis of rock, stream sediment and soil samples, in addition to petrographic study of samples from mineralised zones. Finally, detailed gravimetric studies were carried out on several mafic to ultramafic bodies, potentially host to base metals, complementing the data generated by the regional magnetic/radiometric aerogeophysical surveys carried out during the project. The combination of all these techniques (multi-elemental pXRF and laboratory geochemistry together with the geophysical and geological information) from the multidisciplinary factor analysis made it possible to propose areas of potential interest for mineral prospecting.
Description
Keywords
Recursos minerales Angola Planageo Geoquímica Potencial mineral
Pedagogical Context
Citation
Martín-Méndez, I., Merino-Martínez, E., Batista, M.J., de Oliveira, D., Prazeres, C., Feria, M.C., García-Lobón, J.L. & Manuel, J. (2024) Exploración de recursos minerales en el Proyecto PLANAGEO (Angola). In: Geo-Temas, vol. 20, XI Congresso Geológico de España, Ávila, España, 2-6 July, 2024, p. 1344