Geochronology of the Birim Supergroup of the West African craton in the Wa-Bole region of west-central Ghana: Implications for the stratigraphic framework
The Birim rocks of the West African craton comprise belts of greenschist- to amphibolite-grade gneiss and schist, and subparallel basins of greenschist-grade phyllite of volcaniclastic and epiclastic origin, which were intruded by igneous rocks. The granitoids intruded between 2213 and 2060. Ma and overlap with the volcaniclastic units dated between 2211 and 2064. Ma. The simultaneous occurrence of the magmatic events and irregular distribution of the rock ages hamper the formulation of a...[Show more]
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|Source:||Journal of African Earth Sciences|
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