Isotopic and geochemical constraints for a Paleoproterozoic accretionary orogen in the Borborema Province, NE Brazil: Implications for reconstructing Nuna/Columbia

Petrology and geochemistry of metamorphosed rocks associated with iron formations of the Toko‐Nlokeng iron deposit, (Southern Cameroon): Implications for geodynamic evolution and mineralization

“…According to Figure 13, the procedure required and the likely model for the development of the Nyong Complex have been demonstrated (Bouyo Houketchang et al, 2019). A similar geodynamic scenario has recently been published (Santos et al, 2021) in the Alto Moxotó Terrane evolution constraints for a Palaeoproterozoic accretionary orogen in the Borborema Province, NE Brazil. In the history of crustal evolution, the asthenospheric upwelling of the mantle that caused the granitic intrusion at about 2.8–2.7 is a crucial event in the Congo Archean Shield.…”

“…Djoukouo et al, 2021;Loose & Schenk, 2018;Nga Essomba et al, 2020;Owona et al, 2022;Owona, Ratschbacher, et al, 2020;Soh et al, 2021;Soh Tamehe et al, 2022) eny (e.g., Bouyo Houketchang et al, 2019;Djoukouo et al, 2021;Fuanya et al, 2019;Kamguia Woguia et al, 2022;Loose & Schenk, 2018;Moudioh et al, 2020;Owona et al, 2021;Owona et al, 2022;Owona, Ratschbacher, et al, 2020;Soh et al, 2021). Continental arcs have an extensive range of compositions, from silica-poor stages associated with the early stages of development of convergent plate margins to highly evolved magmas marking the end of subduction (Santos et al, 2021). The mafic and ultramafic metavolcanic rocks of the Nyong Complex represent relics of an early arc stage of about 2.1 Ma, in which tholeiitic magmas were generated by partial mantle melting and deposition of IFs at about 2422 ± 50 Ma.…”

“…The Palaeoproterozoic Nyong Complex is the result of plate tectonic processes between the São Francisco‐Nigerian Block and an ancient Congo megacraton (Figure 1a,b; Bouyo Houketchang et al, 2019; Feybesse et al, 1998; Ledru et al, 1994; Owona et al, 2022; Santos et al, 2021; Soh Tamehe et al, 2022). The greenstone belt has been demonstrated and constrained by amphibolite to granulite‐facies metamorphism.…”

“…The study of mafic‐ultramafic rocks is very important in several aspects in all the Precambrian greenstone belts (Brahmaiah et al, 2017; DeWit & Ashwal, 1995). These rocks exhibit tectonic environments and can provide a good understanding of plate tectonic processes and lithospheric mantle evolution (e.g., Cai et al, 2012; Santos et al, 2021; Su et al, 2011; Zhang et al, 2021). The composition of the Earth's mantle was largely modified by the growth of the continental crust, which in turn provided a stable, buoyant reservoir capable of grabbing mantle material and designing rich and diverse metallogenic belts (e.g., Cassidy et al, 2005; Singh et al, 2018).…”

“…2015) andSantos et al (2021) in Brazil. As the distinct models proposed in this paper show, the Toko-Nlokeng orogenic history in the Nyong Complex during this period still requires geochronological, geochemical, and stable isotope data and further investigation.…”