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New insights into pre-to-post Ediacaran zircon fingerprinting of the Mamfe PanAfrican Basement, SW Cameroon: a possible link with rocks in SE Nigeria and the Borborema province of NE Brazil

Citation

Kanouo, NS and Lentz, DR and Zaw, K and Makoundi, C and Basua, EAA and Yongue, RF and Njonfang, E, New insights into pre-to-post Ediacaran zircon fingerprinting of the Mamfe PanAfrican Basement, SW Cameroon: a possible link with rocks in SE Nigeria and the Borborema province of NE Brazil, Minerals, 11, (9) Article 943. ISSN 2075-163X (2021) [Refereed Article]


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Copyright 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/4.0/)

DOI: doi:10.3390/min11090943

Abstract

The pre- to post-Late Neoproterozoic geological histories in the south to southwestern part of Mamfe Basin (SW Cameroon) were reported following analysis of the zircon crystals from their host rocks. A genetic model was developed for the zircon host rocks' formation conditions, and the registered post-emplacement events were presented. The obtained ages were correlated with the data available for rocks in the Cameroon Mobile Belt, SE Nigeria, and the Borborema Province of NE Brazil. Separated zircons from Araru black to whitish gneiss, Araru whitish-grey gneiss, and Mboifong migmatite were analyzed for their morphology and texture U-Th-Pb composition, and U-Pb ages. Published U-Pb zircon ages for Otu granitic pegmatite, Babi mica schist, and Nkogho I-type anatectic granite were updated. Zircon ages in Araru black to whitish gneiss; Araru whitish-grey, Mboifong migmatite, Babi mica schist, Nkogho I-type anatectic granite, and Otu granitic pegmatite date the Eburnean tectono-magmatic/metamorphic event in Cameroon and SE Nigeria. The Late Paleoproterozoic to Early Mesoproterozoic ages record extensional (continental rift) settings and anorogenic magmatism in the Borborema Province in the NE of Brazil. These ages date collisional phases between the Sao Francisco-Congo and West African cratons and the Saharan metacraton with metamorphism and magmatism in Cameroon. They also date the Kibarian tectono-magmatic/metamorphism and PanAfrican tectono-magmatic/metamorphism in SE Nigeria. The Late Paleoproterozoic to Early Mesoproterozoic ages date the Cariris Velhos orogeny in the Borborema Province in NE Brazil, with Early Tonian crustal rifting, magmatism, and metamorphism and the collisional phase of the Brasiliano orogeny with syn-collisional plutons and extensive shear zoning and post-collisional granite intrusions.

Item Details

Item Type:Refereed Article
Keywords:Cameroon Pan African, basement, mamfe basin, SE of Nigeria, NE of Brazil, U-Pb zircon, zircon, petrology, age dating, mineral
Research Division:Earth Sciences
Research Group:Geology
Research Field:Geochronology
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the earth sciences
UTAS Author:Zaw, K (Professor Khin Zaw)
UTAS Author:Makoundi, C (Mr Charles Makoundi)
ID Code:151957
Year Published:2021
Deposited By:CODES ARC
Deposited On:2022-08-09
Last Modified:2022-09-05
Downloads:1 View Download Statistics

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