TY - JOUR
T1 - Petrology, metallogeny and U-Pb geochronology of the paleoproterozoic mafic-ultramafic Hamutenha intrusion, Angolan Shield
AU - Campeny, Marc
AU - Proenza, Joaquín A.
AU - Castillo-Oliver, Montgarri
AU - Torró, Lisard
AU - Villanova-de-Benavent, Cristina
AU - Melgarejo, Joan Carles
AU - Gonçalves, Antonio O.
AU - Román-Alpiste, Manuel J.
AU - Blanco-Quintero, Idael F.
AU - Llovet, Xavier
AU - Farré-de-Pablo, Júlia
N1 - Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2023/1
Y1 - 2023/1
N2 - 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 southern unit is composed of amphibole diorites. The Hamutenha body is hosted by the Paleoproterozoic Epupa Complex in the Angolan Shield, SW margin of the Congo Craton. A mineralogical, petrological and geochemical study of the Hamutenha intrusion has been performed. The constrained compositional features of the parental melt suggest interaction of tholeiitic magmas with a significant enrichment in Fe and Ti. Although disseminated Fe–Ni–Cu-(Co) secondary sulphides are observed, both the crustal contamination parameters and generally low bulk-rock metals contents indicate that these elements were most likely previously extracted from the parental melt. U–Pb zircon dating of amphibole diorite samples from the southern unit yields a date of 1844 ± 14 Ma. These data suggest that the emplacement of these rocks was previous to the KC emplacement and it was probably related to the Paleoproterozoic Epupa Complex magmatism.
AB - 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 southern unit is composed of amphibole diorites. The Hamutenha body is hosted by the Paleoproterozoic Epupa Complex in the Angolan Shield, SW margin of the Congo Craton. A mineralogical, petrological and geochemical study of the Hamutenha intrusion has been performed. The constrained compositional features of the parental melt suggest interaction of tholeiitic magmas with a significant enrichment in Fe and Ti. Although disseminated Fe–Ni–Cu-(Co) secondary sulphides are observed, both the crustal contamination parameters and generally low bulk-rock metals contents indicate that these elements were most likely previously extracted from the parental melt. U–Pb zircon dating of amphibole diorite samples from the southern unit yields a date of 1844 ± 14 Ma. These data suggest that the emplacement of these rocks was previous to the KC emplacement and it was probably related to the Paleoproterozoic Epupa Complex magmatism.
KW - Angola
KW - Dunites
KW - Gabbros
KW - Hamutenha
KW - U–Pb geochronology
UR - http://www.scopus.com/inward/record.url?scp=85139850098&partnerID=8YFLogxK
U2 - 10.1016/j.jafrearsci.2022.104733
DO - 10.1016/j.jafrearsci.2022.104733
M3 - Article
AN - SCOPUS:85139850098
SN - 1464-343X
VL - 197
JO - Journal of African Earth Sciences
JF - Journal of African Earth Sciences
M1 - 104733
ER -