| Country | Volcanosedimentary belts | Major lithologies | Main features | Geochronological data |
| Cameroon | Poli Belt [18] [64] [65] | Greywacke-type metasediments -Volcanogenic clastic rocks (mainly tuff) -Tholetiitic basalt -Calc-alkaline rhyolite -Pre, syn-to post tectonic granitoids | -Low to high grade -NE trend of foliation appears consistent throughout the different belts -Strong sub-vertical foliation | -Origin of detrital sources: 920, 830, 780, 736 Ma -Depositional age: 700 - 665 Ma -Age of deformation: 612 Ma (Badjouma metadiorite) -Age of metamorphism: ca 600 Ma (High pressure metapelitic granulite) |
| Chad | Rey Bouba Belt [19] | -Flysch (greywacke and pelite) -Sandstone, siltstone, black shale, limestone and dacite -Conglomerate and coarse-grained arkose with pebbles of volcanic rock -Andesitic and dacitic tuff and breccias -Pre, syn-to post tectonic granitoids | -Low to medium grade -Basin located along a strike slip fault (Tcholliré-Banyo Fault) | -Depositional age: 750 Ma |
|
| Bibémi-Zalbi Belt |
| -Low to medium grade |
|
| Chad | Zalbi or Bibémi-Zalbi Belt [20] [25] [66] | -Spilitic rocks -Black shale and chert -Sandy and silty claystone -Basaltic volcanic and volcanosedimentary rocks -Pre, syn-to post tectonic granitoids | -Low to medium grade | -Crystallization: 700 Ma (metabasalt), 777 Ma (epiclastite) |
|
| Goueygoudoum [20] | -Covered by thick soil and shows only few bedrock outcrops | -Low to medium grade |
|
| Country | Batholith (magmatic arc) | Major lithologies | Main features | Geochronological data |
| Cameroon | Sinassi Batholith [19] [67] | -Tonalite Trondjemite-Granodiorite (TTG) | -Calc-alkaline suite | -Crystallization: 690 Ma (Doudja tonalite) -Age of emplacement: 677 Ma (Sinassi tonalite) -Age of deformation: 639 Ma (Landou granite) |
| Chad | Mayo Kebbi Batholith [20] [21] | -Gabbro-diorite metadiorite -TTG -Granodiorite-monzodiorite | -Calc-alkaline suite | -Age of emplacement: ca 740 Ma (Boloro metadiorite), 723 Ma (Boloro gabbro-diorite), ca 665 - 640 Ma (Matanseng tonalite), 570 Ma (Pala granodiorite) |