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Lithostratigraphy of the Manganese Exploration Sites of the Lebaye Plateau in the Okondja Basin (SE-GABON)

¹ École Normale Supérieure, Multidisciplinary Science Laboratory, Libreville, Gabon
² École Normale Supérieure, Multidisciplinary Science Laboratory, Libreville, Gabon
³ Institute of Agronomic and Forestry Research, Soil Science Laboratory, Libreville, Gabon
⁴ FAGEC INTELLIGENTIA Consulting Firm, Libreville, Gabon
⁵ FAGEC INTELLIGENTIA Consulting Firm, Libreville, Gabon

International Journal of Geosciences·Volume 17 (2026)·Pages 400–413·Published 23 June 2026·DOI10.4236/ijg.2026.176019

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.

KeywordsLithostratigraphyMineralizationLamellarSupergeneManganeseHydrogeological

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Lithostratigraphy of the Manganese Exploration Sites of the Lebaye Plateau in the Okondja Basin (SE-GABON)

Abstract

References (11)