TITLE:
Lithostratigraphy of the Manganese Exploration Sites of the Lebaye Plateau in the Okondja Basin (SE-GABON)
AUTHORS:
Ismaël Estime Mbagou Mwe-Zue Ona, Charlie Morelle Angue Minto’o, Dieudonné Ndzengboro Endamane, Gdh Angone Angone, Audril Nziengui-Ndala
KEYWORDS:
Lithostratigraphy, Mineralization, Lamellar, Supergene, Manganese, Hydrogeological
JOURNAL NAME:
International Journal of Geosciences,
Vol.17 No.6,
June
24,
2026
ABSTRACT: This article examines the lithostratigraphy and typology of manganese mineralization on the Lebaye plateau based on trench observations and approximately one hundred rock samples analyzed by portable X-ray fluorescence. It identifies lamellar manganese ore as the main exploitable facies within a supergene alteration profile derived from manganese-bearing ampelites of the Francevillian succession. The manuscript also classifies the ore as medium-grade and raises hydrogeological considerations relevant to the future development of the quarry.