25 documents found, page 1 of 3

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Namibe Group detrital zircon U-Pb and Lu-Hf isotopes: a testimony of late-Orosi...

Ferreira, Ezequiel; Lehmann, Jeremie; Rodrigues, José Feliciano; Silva, Paulo Bravo; Smith, Trishya M. Owen; García-Lobón, J. L.; Correia, João

ABSTRACT: The Namibe Group represents the largest package of immature supracrustal rocks of the Angola Shield (Congo Craton), occupying an area of nearly 10,000 km2 in the Namibe Zone (NZ). It is a folded, steeply dipping, meta-volcanosedimentary sequence essentially comprising immature micaschists and greywackes, felsic metavolcaniclastites, along with intercalated marbles and amphibolites. The metavolcanosedi...

Date: 2026   |   Origin: Repositório do LNEG

The UTE-PLANAGEO Project (National Geology Plan of Angola). Objectives, methods...

Garcia-Lobon, Jose Luis; Merino-Martinez, Enrique; Fernández, J.; Carvalho, João; Batista, Maria Joao; Escuder, Javier; Lisboa, Jose

ABSTRACT: The National Geology Plan of Angola (PLANAGEO) has been one of the most important Angolan infrastructure projects throughout the past twenty years. The objectives of PLANAGEO were: (a) to enhance Angola's geological and mineral resources knowledge; (b) to foster diversification of the national economy; and, (c) to attract foreign investment and promote the country development. The project integrated r...

Date: 2025   |   Origin: Repositório do LNEG

Detailed in-depth mapping of the world largest anorthositic complex: Magnetic a...

Merino-Martínez, E.; Rey-Moral, Carmen; Machadinho, Ana; Carvalho, João; Represas, Patricia; García-Lobón, J. L.; Feria, María Carmen

ABSTRACT: The Kunene Complex (KC) represents a very large Mesoproterozoic igneous body, mainly composed of anorthosites and gabbroic rocks that extends from SW Angola to NW Namibia (outcropping 18,000 km2 , NE-SW trend, and ca. 350 km long and up to 50 km wide). Little is known about its structure at depth. Here, we use recently acquired aerogeophysical data to accurately determine its hidden extent and to unra...

Date: 2025   |   Origin: Repositório do LNEG

Pre-Mesoproterozoic crustal framework and Mesoproterozoic evolution of the SW A...

Merino-Martínez, E.; Ferreira, Ezequiel; Valverde-Vaquero, Pablo; Rodrigues, José Feliciano; Escuder-Viruete, Javier; Garcia-Lobon, Jose Luis

ABSTRACT: The southwestern Angolan Shield hosts the Earth's largest Mesoproterozoic massif-type anorthosite complex (up to 53,500 km(2)), the Kunene Complex (KC). This complex is the result of a long-lived (similar to 200 Ma) episodic emplacement of coalescent magmatic pulses. The recent acquisition of multidisciplinary data during the PLANAGEO project has significantly enhanced our understanding of the Precamb...

Date: 2025   |   Origin: Repositório do LNEG

Pre-Mesoproterozoic crustal architecture and implications for the Mesoproterozo...

Merino-Martínez, E.; Ferreira, Ezequiel; Valverde-Vaquero, Pablo; Rodrigues, José Feliciano; Escuder-Viruete, Javier; Garcia-Lobon, Jose Luis

ABSTRACT: Several studies suggest the existence of multiple tectonic domains within the Angolan Shield [1], yet the Archaean to Palaeoproterozoic basement of SW Angola and NW Namibia remains largely unexplored. Similarly, distinct Mesoproterozoic (1534–1065 Ma) igneous suites are documented in the SW Angolan Shield, including the largest known gabbro-anorthosite complex (~42,500 km²), the Kunene Complex (KC), b...

Date: 2025   |   Origin: Repositório do LNEG

Zircon U-Pb and Lu-Hf Constraints on the Paleo- to Mesoproterozoic Evolution of...

Ferreira, Ezequiel; Lehmann, Jeremie; Rodrigues, José Feliciano; Hayes, Ben; Merino-Martinez, Enrique; Milani, Lorenzo; Bybee, Grant M.

ABSTRACT: The crustal evolution of the Angolan Shield (AS) remains poorly constrained. To address this, we analysed U-Pb and Lu-Hf isotopes in detrital and igneous zircons to determine the age and provenance of extensive sedimentary strata in southwest Angola, and use them as a proxy for the Paleoproterozoic to Mesoproterozoic evolution of the southwest AS. Mesoproterozoic maximum depositional ages between 1334...

Date: 2025   |   Origin: Repositório do LNEG

Modelización magnética del Complejo de Cunene (SW Angola) [Resumo]

Mochales, Tania; Merino-Martínez, E.; Rey-Moral, Carmen; Machadinho, Ana; Carvalho, João; Represas, Patricia; García-Lobón, J. L.; Feria, María Carmen

RESUMEN: El Complejo de Cunene (CC) representa un extenso macizo ígneo mesoproterozoico compuesto por rocas anortosíticas, gabroicas y ácidas contemporáneas, que aflora 18.000 km2 en dirección NNE-SSW desde el SW de Angola al NW de Namibia. Se han interpretado y modelizado en 2,5/3D los datos aerogeofísicos obtenidos en el proyecto PLANAGEO para investigar los límites no expuestos del CC, reconstruyendo la estr...

Date: 2024   |   Origin: Repositório do LNEG

El Plan Nacional de Geología de Angola (PLANAGEO) [Resumo]

García-Lobón, J. L.; Merino-Martínez, E.; Rodrigues, José Feliciano; Fernández, J.; Viruete, Javier Escuder; Pereira, E.; Carvalho, João

RESUMEN: El Plan Nacional de Geología de Angola (PLANAGEO) ha sido uno de los proyectos geotemáticos internacionales más importantes de las últimas décadas. El proyecto fue lanzado por Gobierno de la República de Angola e implementado por el Instituto Geológico de Angola (IGEO), bajo la supervisión del Ministerio de Recursos Minerales, Petróleos y Gas (MIREMPET). Los principales objetivos de PLANAGEO fueron: a)...

Date: 2024   |   Origin: Repositório do LNEG

Mapas de potencial mineral en el sur de Angola: el primer enfoque de un mapa de...

Batista, Maria Joao; Martín-Méndez, I.; Merino-Martínez, E.; Prazeres, Cátia; Cuervo, I.; Manuel, José; de Oliveira, Daniel Pipa Soares

RESUMEN: Los mapas de recursos minerales a escala 1:50.000 fueron realizados en la última fase del Proyecto PLANAGEO con el objetivo de evaluar el potencial mineral de la región sur de Angola. Los objetivos elegidos fueron, entre otros, las zonas que contienen Au-Fe en las áreas de Jamba-Cassinga-Tchamutete, Chipindo y Cuima-Samboto. Los mapas integraron mapas geológicos, datos magnéticos y radiométricos aéreos...

Date: 2024   |   Origin: Repositório do LNEG

El Mapa Metalogenético preliminar del Sur de Angola a escala 1:1.000.000

Merino-Martínez, E.; Batista, Maria Joao; Martín-Méndez, I.; de Oliveira, Daniel Pipa Soares; Feria, María Carmen; Fortes, Carla; Prazeres, Cátia

RESUMEN: La República de Angola dispone de un amplio e interesante catálogo de mineralizaciones, según sus diversos entornos geológicos y geotectónicos, que cubren edades desde el arcaico superior hasta épocas más recientes. Esto hace de Angola una región de gran interés por su potencial en yacimientos minerales. Prueba de ello es el fruto de la exploración e importante actividad minera desarrollada a lo largo ...

Date: 2024   |   Origin: Repositório do LNEG

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