Relics of ophiolite-bearing accretionary wedges in NE Brazil and NW Africa: Connecting threads of western Gondwana´s ocean during Neoproterozoic times

Mapping geological configuration using geophysics data: an investigative approach in targeting iron ore, gold mineralization and other commodities, a case study of Toko-Nlokeng area (Nyong Greenstone Belt, SW Cameroon)

“…Presented Aeromagnetic–Radiometric Processing, structural and petrological data suggest that the complex network of the main NE–SW shear zones that likely characterise ancient sutures that mark collisional episodes between Archean–Paleoproterozoic paleocontinents such as Amazonian-West African and São Francisco-Congo similar to result document by Leite et al (2019) and Santos et al (2017, 2022, 2023) in Brazil. This study suggested the understanding of the accretionary evolution of western Gondwana in the Nyong complex.…”

“…The integration of geological and geophysical datasets is useful in tropical and equatorial regions where deposits are generally covered by heavy vegetation and thick laterite profiles and can provide in-depth information on ore genesis. Such an interdisciplinary approach has provided successful results in Precambrian terrains in Australia (Aitken and Betts 2009; Holden et al 2012; Hronsky and Kreuzer 2019; Hronsky 2020), in Brazil (Leite et al 2019; Santos et al 2017, 2022) West and Central Africa (Metelka et al 2011; Jessell et al 2016; Chardon et al 2020 Sepwouo et al 2022), the south Eastern Desert of Egypt (Zoheir 2012; Eldosouky et al 2017; Karmel et al 2022), the Guiana Shield in South America (Combes et al 2022) and Canada (Montsion et al 2021). Among the wide range of geophysical methods, the aeromagnetic method is considered to be one of the most rapid, cost-effective and versatile geophysical tools that can help reveal large- and small-scale features, including differences between basement rock types, magmatic intrusions, volcanic rocks and fault structures (Feumoe et al 2012; Holden et al 2012; Combes et al 2022).…”

“…The Paleoproterozoic Nyong complex is the result of plate tectonic processes such as ocean opening, plate compartment convergence, subduction and collision between the São Francisco–Nigerian block and an ancient Congo megacraton (Figure 1(a, b; d), Ledru et al 1994 Toteu et al 1994 Feybesse et al 1998 Lerouge et al 2006 Bouyo Houketchang et al 2019 Owona et al 2022 Santos et al 2023). New geophysical, structural and petrological data suggest that the complex network of shear zones that once connected the Borborema province (NE Brazil), Tuareg shield (Hoggar) and Central African domain (NW Africa) likely characterise ancient sutures that mark collisional events between Archean-Paleoproterozoic paleocontinents such as Amazonian-West African and São Francisco-Congo (Evina Aboula et al 2023a Santos et al 2022 2023 .…”

Estudo integrado de aerogeofísica e geologia estrutural aplicado ao mapeamento geológico do entorno da Serra do Jatobá, Terreno Alto Pajeú, Província Borborema

“…Durante os últimos 20 anos, interpretações qualitativas e quantitativas de imagens de satélite, mapas magnetométricos e gamaespectrométricos têm contribuído substancialmente para o aprimoramento dos modelos geológico--estruturais de cinturões orogênicos brasileiros, tais como a Província Borborema, no Nordeste do Brasil (Oliveira e Medeiros, 2018;Melo et al, 2022;Neves et al, 2022). Esta província é particularmente importante para o entendimento da evolução crustal da América do Sul por apresentar, em reconstituições paleogeográficas, continuidade litológica e estrutural com as faixas orogênicas africanas ao longo da Nigéria, de Camarões e Togo (Van Schmus et al, 2008;Santos et al, 2008Santos et al, , 2022Santos et al, , 2023aCaxito et al, 2020a). A combinação destes dados com análise estrutural em escalas meso e microscópicas, bem como com mapeamento geológico sistemático, tem sido fundamental para o estudo de possíveis limites de terrenos na região (e.g., Medeiros et al, 2011;Oliveira et al, 2023;Santos et al, 2023b), contribuindo para o aprimoramento de modelos geológicos regionais, além de auxiliar campanhas prospectivas em áreas potencialmente mineralizadas (e.g., Pereira et al, 2019;Araújo Neto et al, 2023).…”