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Crustal growth and reworking of the Southern West African craton: Implications for regional tectonics
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DOI：10.1016/j.earscirev.2026.105624.png)
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Abstract
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• Crustal growth in the southern West African Craton spanned ∼2350–2060 Ma. • Two orogenic cycles drove juvenile magmatism and shaped the metallogenic record. • Negative εHf values fingerprint Archean crustal reworking during the Eoeburnean. • Hf isotopic signatures delineate juvenile vs. reworked metallogenic domains. • Mixed εHf in late-orogenic rocks records mantle input via lithospheric delamination. • Combined geological data support a ∼3,500 km basin closed by two subduction segments.
Keywords:
Paleoproterozoic tectonic evolution
Crustal growth
Isotopic geochemistry
West African Craton
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