[ Apport de la lithostratigraphie dans la mise en évidence du contact anormal entre le socle et le bassin sédimentaire ivoirien dans la région d’Alepe (Côte d’Ivoire) ]
Kouao Assiè François1, Ouattara Ismaël Ben2, and Kra Akoua Clarisse3
1 Department of earth sciences and mining resources, Felix Houphouët-Boigny University, Abidjan, Côte d’Ivoire
2 Department of earth sciences and mining resources, Felix Houphouët-Boigny University, Abidjan, Côte d’Ivoire
3 Department of earth sciences and mining resources, Felix Houphouët-Boigny University, Abidjan, Côte d’Ivoire
Original language: French
Copyright © 2026 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Alépé region is located in the southeastern part of the sedimentary basin Ivorian Onshore. Lithostratigraphic characterization helps clarify lithological facies, define sedimentary sequences and highlight the contact between the basement and the Ivorian sedimentary basin. The lithostratigraphic characterization rocks reveal an abnormal contact between Alépé formations and those of the base of the sedimentary basin. Tertiary-Quaternary deposits recover in discordance the Precambrian basement. The stratigraphic sequence occurs from the bottom up as follows: basal conglomerates, clays in various colors; conglomerates, sandy clays, clayey sands, ferruginous quartz sandstone with cement, stone line, earth bar. These sedimentary formations were deposited in fluvial channels to meandering braided type.
Author Keywords: Alépé (Côte d’Ivoire), sedimentary basin, lithostratigraphic, Tertiary-Quaternary, fluvial channels.
Kouao Assiè François1, Ouattara Ismaël Ben2, and Kra Akoua Clarisse3
1 Department of earth sciences and mining resources, Felix Houphouët-Boigny University, Abidjan, Côte d’Ivoire
2 Department of earth sciences and mining resources, Felix Houphouët-Boigny University, Abidjan, Côte d’Ivoire
3 Department of earth sciences and mining resources, Felix Houphouët-Boigny University, Abidjan, Côte d’Ivoire
Original language: French
Copyright © 2026 ISSR Journals. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract
Alépé region is located in the southeastern part of the sedimentary basin Ivorian Onshore. Lithostratigraphic characterization helps clarify lithological facies, define sedimentary sequences and highlight the contact between the basement and the Ivorian sedimentary basin. The lithostratigraphic characterization rocks reveal an abnormal contact between Alépé formations and those of the base of the sedimentary basin. Tertiary-Quaternary deposits recover in discordance the Precambrian basement. The stratigraphic sequence occurs from the bottom up as follows: basal conglomerates, clays in various colors; conglomerates, sandy clays, clayey sands, ferruginous quartz sandstone with cement, stone line, earth bar. These sedimentary formations were deposited in fluvial channels to meandering braided type.
Author Keywords: Alépé (Côte d’Ivoire), sedimentary basin, lithostratigraphic, Tertiary-Quaternary, fluvial channels.
Abstract: (french)
La région d’Alépé est située dans la partie sud-est du bassin sédimentaire ivoirien « Onshore ». La caractérisation lithostratigraphique contribue à préciser les faciès lithologiques, à cerner les séquences sédimentaires et à mettre en évidence le contact entre le socle et le bassin sédimentaire ivoirien. La caractérisation lithostratigraphique des roches révèlent à Alépé un contact anormal entre les formations du socle et celles du bassin sédimentaire. Les dépôts Tertiaire-quaternaires recouvrent en discordance le socle Précambrien. La séquence lithostratigraphique se présente de bas en haut comme suit: conglomérats de base; argiles à diverses colorations; conglomérats; argile sableuse; sables argileux; grès quartzeux à ciment ferrugineux; stone line; Terre de barre. Ces formations sédimentaires se sont déposées dans des chenaux fluviatiles de type anastomosés à méandriformes.
Author Keywords: Alépé (Côte d’Ivoire), bassin sédimentaire, lithostratigraphique, Tertiaire-quaternaire, chenaux fluviatiles.
