A new kaolin deposit in western Africa: mineralogical and compositional features of kaolinite from Caluquembe (Angola) 

Tauler, Esperança; Xu, Jingyao; Melgarejo, Joan Carles; Gonçalves, Antonio Olimpio; Campeny, Marc (2019-07-03)

Large kaolin deposits developed by weathering on Precambrian granitic rocks have been discovered in the Caluquembe area, Huíla province, Angola. To determine accuracy of analysis and to evaluate the samples kaolinite grade, ...

Fe–Ti(–V) oxide deposits of the Kunene Anorthosite Complex (SW Angola): mineralogy and thermo-oxybarometry 

Villanova-de-Benavent, Cristina; Torró, Lisard; Castillo-Oliver, Montgarri; Campeny, Marc; Melgarejo, Joan Carles; Llovet, Xavier; Galí, Salvador; Gonçalves, Antonio Olimpio (2017-12-14)

The Kunene Intrusive Complex (KIC), in NW Namibia and SW Angola, is one of the largest Proterozoic anorthosite massif-type exposures in the world. A geochemical, mineralogical and petrological study of four Fe–Ti(–V) oxide ...

Mica-vermiculite intergrowth expansion through natural processes in pyroclastic carbonatites from Catanda (Angola) 

Xu, Jingyao; Campeny, Marc; Tauler, Esperança; Melgarejo, Joan Carles; Gonçalves, Antonio Olimpio (2017-07)

Petrology, metallogeny and U-Pb geochronology of the paleoproterozoic mafic-ultramafic Hamutenha intrusion, Angolan Shield 

Campeny, Marc; Proenza, Joaquín A.; Castillo-Oliver, Montgarrí; Torró, Lisard; Villanova-de-Benavent, Cristina; Melgarejo, Joan Carles; Gonçalves, Antonio O.; Román-Alpiste, Manuel J.; Blanco-Quintero, Idael F.; Llovet, Xavier; Farré-de-Pablo, Júlia (2023-10-13)

The Hamutenha intrusion (Huíla province, SW Angola) is a 3-km-long elongated magmatic body defined by a set of two intrusive units. The northern unit is formed by alternating bands of dunites and olivine gabbros, while the ...

Quantitative analysis and valorisation of Kaolinite from Caluquembe (Angola) by x-ray powder diffraction and thermogravimetric tecniques 

Xu, Jingyao; Amores, Sandra; Tauler, Esperança; Melgarejo, Joan Carles; Martínez, Salvador; Gonçalves, Antonio Olimpio; Campeny, Marc (2017)

Kaolin deposits has been for long exploited in several regions of Angola, and some of the most important are produced by weathering of anorthositic rocks from the Cunene complex. However, a systematic research has not been ...

Recent carbonatitic magmatism in Angola: the dykes of the Chiva lagoon maar 

Campeny, Marc; Melgarejo, Joan Carles; Mangas, José; Manuel, José; Gonçalves, Antonio Olimpio (2017-03-03)

Chiva is a circular lagoon with a diameter of 900 m, located in the vicinity of the Catanda graben (Angola). This area is largely covered by Quaternary lacustrine sediments, however, a few dykes of carbonatiticcomposition ...

Southwestern Africa on the burner: pleistocene carbonatite volcanism linked to deep mantle upwelling in Angola 

Giuliani, Andrea; Campeny, Marc; Kamenetsky, Vadim S.; Afonso, Juan Carlos; Maas, Roland; Melgarejo, Joan Carles; Kohn, Barry P.; Matchan, Erin L.; Mangas, José; Gonçalves, Antonio Olimpio; Manuel, José (2017-07-19)

The origin of intraplate carbonatitic to alkaline volcanism in Africa is controversial. A tectonic control, i.e., decompression melting associated with far-field stress, is suggested by correlation with lithospheric sutures, ...