Nomenclature of the studied rock samples. (a) Position of Bini Warack lavas in the Na₂O+K₂O versus SiO₂ classification diagram of Le Bas et al. (1986)—the black stars correspond to data from Tiabou et al. (2019), while the red stars are analyses from the current work; (b) Position of the studied mantle xenoliths in the classification diagram for ultramafic rocks of Streckeisen (1976) compared to other mantle xenoliths studied along the CVL. Ol, olivine; Opx, orthopyroxene; Cpx, clinopyroxene; D, dunite; O, orthopyroxenite; C, clinopyroxenite; H, Harzburgite. Average European subcontinental lithospheric mantle (AESCLM) after Downes (1997); xenoliths from respective sectors of the CVL modified from Pintér et al. (2015) using recent data of Nkouandou et al. (2015), Wagsong Njombie et al. (2018), Tedonkenfack et al. (2021), and Puziewicz et al. (2023).