Geodynamic Evolution of Cratonic Terrains in Central Africa
Summary
Central Africa hosts one of the oldest segments of continental lithosphere on Earth, dominated by the Archean Congo craton and its surrounding mobile belts. This region has experienced multiple tectonothermal episodes, from early Mesoarchean crust formation through Palaeoproterozoic collisions and the Neoproterozoic Pan-African orogeny. Beneath its stable interior lie relics of greenstone belts, banded iron formations and high-grade gneisses, while its margins record reworking by shear zones, magmatic intrusions and sedimentary basin development. Geodynamic processes such as lithospheric thinning, plume-related magmatism and transcurrent deformation have locally reactivated the craton, fostering mineralisation of iron, base metals and rare-element granites. Integrated studies of structural mapping, geochronology and geophysical imaging reveal how successive orogenic pulses have welded the Congo craton to adjacent shields, shaped the crustal architecture and influenced its long-term stability. These findings bear on global models of lithospheric evolution, craton preservation and the distribution of mineral resources.
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Geodynamic Evolution of Cratonic Terrains in Central Africa publication trend
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Technical terms
Craton: Ancient, stable block of continental lithosphere that has undergone little deformation since the Archean.
Pan-African orogeny: Neoproterozoic tectonothermal event (ca 600–500 Ma) that shaped the assembly of Gondwana and reworked cratonic margins.
U-Pb zircon dating: Radiometric method using uranium–lead decay in zircon crystals to establish precise rock ages.
Banded Iron Formation (BIF): Layered sedimentary deposit of alternating iron-rich and silica-rich bands, recording early Precambrian ocean chemistry.
Detrital zircon: Zircon mineral grains eroded from source rocks and deposited in sedimentary basins, preserving age information of provenance.
References
- New U–Pb zircon ages of Nyong Complex meta‐plutonites: Implications for the Eburnean/Trans‐Amazonian Orogeny in southwestern Cameroon (Central Africa). Geological Journal (2020).
- New detrital zircon U-Pb ages from BIF-related metasediments in the Ntem Complex (Congo craton) of southern Cameroon, West Africa. Natural Science (2013).
- The Pan-African High-K I-Type Granites From Batié Complex, West Cameroon: Age, Origin, and Tectonic Implications. Frontiers in Earth Science (2020).
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