Abstract
Petrological and geochemical data of scoriae from the southern part of the continental Cameroon Volcanic Line were obtained through field and laboratory investigations. Field observations were done at nine localities (Limbe, Djoungo, Loum-Tombel, Manjo-Monengolle, Melong, Doupe, Yamba, Foumbot, Njinkouo, and Galim) under forest and savanna cover during the dry season in order to facilitate the collect of samples. This was based on some criteria such as the size (centimeter to metric) and the color (gray, brown, red, or black) of samples. During the same field works, samples were also collected. Microscopic observations were done using a Leica DM 750P optic microscope. Mineralogical assemblages of crystalline phases without the amorphous phases were obtained by X-ray diffraction (XRD) instrument. Geochemical data of major elements were acquired using the X-ray fluorescence spectrometry (XRF). The contents of some major elements and the evaluation of the chemical weathering intensity of scoriae are presented together in the ternary diagrams. The evaluation of intensity of chemical weathering was done using bivariate diagram CIW (Chemical Index of Weathering) versus CIA (Chemical Index of Alteration). Chemical bonds were observed using infrared spectra. These data provide chemical conditions of volcanic scoriae that must have to be used in civil applications such cement manufacture. Data of this paper are further presented and discussed in Ngono Onana et al. [1].