Figure 10. Plot of Th/U ratios vs. Th (a) and Th/Sc versus Zr/Sc(b) [46] Average source rock compositions are of Proterozoic age [44]. BAS, basalt; AND, andesite; GRA, granite; and PSS, Proterozoic sandstone

From

Geochemistry of the Neoproterozoic Mbondo-Ngazi Tina Metasediments, Adamawa Area, Central Cameroon: Source Provenance and Tectonic Setting

Alexis Hamdja Ngoniri, Timoleon Ngnotue, Evine Laure Tanko Njiosseu, Patrick Ayonta Kenne, Sylvestre Ganno, Jean Paul Nzenti

Journal of Geosciences and Geomatics. 2020, 8(2), 94-109 doi:10.12691/jgg-8-2-5