This study presents an integrated petrographic and geochemical investigation of granitoid and metamorphic rocks from the Pamsi locality in the North Cameroon Domain of the Pan-African Fold Belt. Field observations, microscopic analysis, and whole-rock geochemistry reveal five main lithological units: amphibole-biotite granite, leucogranite, granodiorite, orthogneiss, and amphibolite. These rocks form a calc-alkaline suite ranging from syeno-diorite to granite, classified as I-type, sub-alkaline, potassic to hyperpotassic, and predominantly peraluminous to metaluminous. Geochemical signatures include strong LREE enrichment, negative Eu anomalies in most samples, and multi-element patterns showing negative Ta-Nb, Sr, and Ti anomalies with positive Th, Zr, and U anomalies, characteristic of differentiated magmas from mixed crustal-mantle sources. Tectonic discrimination diagrams indicate volcanic arc to syn-collisional settings consistent with Pan-African orogenesis. Pathfinder element analyses reveal preliminary indications of lithium exploration potential, with samples N11 and N51 showing notable cesium enrichment (8.80–11.30 ppm) and elevated Cs/Rb ratios. Based on established geochemical correlations—and pending direct lithium measurements—estimated lithium contents of 200–800 ppm are proposed as preliminary targets for further investigation. These results highlight the Pamsi area as a promising prospect for lithium mineralization associated with evolved pegmatitic systems, warranting systematic follow-up studies.
Kepnamou et al. (Tue,) studied this question.