Volume 38, Issue 3, January 2023, Pages 592–604
Leyla Boubacar Hamidou1, Mohamed Atmane Abdourahim2, Aboulwahid Sani3, Habsatou Ousmane4, and Moussa Konaté5
1 Université Abdou Moumouni, Faculté des sciences et techniques, Département de Géologie, B.P. 10662, Niamey, Niger
2 Université Abdou Moumouni, Faculté des sciences et techniques, Département de Géologie, B.P. 10662, Niamey, Niger
3 Université d’Agadez, Faculté des Sciences et Techniques, Département de Géologie, PO Box 199 Agadez, Niger
4 Université Abdou Moumouni, Faculté des Sciences et Techniques, Laboratoire des Eaux Souterraines et Géoressources, Equipe Bassins et Géoressources, BP 10662 Niamey, Niger
5 Université Abdou Moumouni de Niamey, Faculté des Sciences et Techniques, Laboratoire de Géologie: Eaux Souterraines et Géoressources, BP 10662, Niamey, Niger
Original language: English
Copyright © 2023 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.
Multi-channel seismic and well data from Agadem (Termit Basin), a Mesozoic–Cenozoic intra‐continental rift basin located in the West and Central African Rift System (WCARS), has been analyzed. Regional unconformities, including the top of acoustic basement, have been identified from seismic data. The correlation of wells in the Agadem Block, as well as the seismic data interpretation, show that the lateral thickness variations of the layers is linked to the synsedimentary normal activation of the N140° to N150° trending fault system of the Termit Basin. The well logs correlation exhibits a high hydrocarbon potential, in the axial zone of the Agadem Block, which is characterized by a strong subsidence rate. This study shows that the NW-SE-trending graben shaped Termit Basin exhibits a tilted block structuring, controlled by the synsedimentary reactivation of normal faults. Two major periods of structuring characterize the evolution of the Termit Basin: - The first period, which was an extension stage, including the first rifting stage relayed by a thermal subsidence, occurred from early Cretaceous to Upper Cretaceous, during the south Atlantic opening. - During the second period, which prevailed from Paleocene to Oligocene, the Termit basin was also affected by a second rifting event, followed by a thermal tectonic subsidence. The NW-SE trending faults was secondly reactivated during a NE-SW extensional regime.
Author Keywords: Agadem block, tectono-sedimentary, tilted blocks, upper Cretaceous, Paleogene.
Leyla Boubacar Hamidou1, Mohamed Atmane Abdourahim2, Aboulwahid Sani3, Habsatou Ousmane4, and Moussa Konaté5
1 Université Abdou Moumouni, Faculté des sciences et techniques, Département de Géologie, B.P. 10662, Niamey, Niger
2 Université Abdou Moumouni, Faculté des sciences et techniques, Département de Géologie, B.P. 10662, Niamey, Niger
3 Université d’Agadez, Faculté des Sciences et Techniques, Département de Géologie, PO Box 199 Agadez, Niger
4 Université Abdou Moumouni, Faculté des Sciences et Techniques, Laboratoire des Eaux Souterraines et Géoressources, Equipe Bassins et Géoressources, BP 10662 Niamey, Niger
5 Université Abdou Moumouni de Niamey, Faculté des Sciences et Techniques, Laboratoire de Géologie: Eaux Souterraines et Géoressources, BP 10662, Niamey, Niger
Original language: English
Copyright © 2023 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
Multi-channel seismic and well data from Agadem (Termit Basin), a Mesozoic–Cenozoic intra‐continental rift basin located in the West and Central African Rift System (WCARS), has been analyzed. Regional unconformities, including the top of acoustic basement, have been identified from seismic data. The correlation of wells in the Agadem Block, as well as the seismic data interpretation, show that the lateral thickness variations of the layers is linked to the synsedimentary normal activation of the N140° to N150° trending fault system of the Termit Basin. The well logs correlation exhibits a high hydrocarbon potential, in the axial zone of the Agadem Block, which is characterized by a strong subsidence rate. This study shows that the NW-SE-trending graben shaped Termit Basin exhibits a tilted block structuring, controlled by the synsedimentary reactivation of normal faults. Two major periods of structuring characterize the evolution of the Termit Basin: - The first period, which was an extension stage, including the first rifting stage relayed by a thermal subsidence, occurred from early Cretaceous to Upper Cretaceous, during the south Atlantic opening. - During the second period, which prevailed from Paleocene to Oligocene, the Termit basin was also affected by a second rifting event, followed by a thermal tectonic subsidence. The NW-SE trending faults was secondly reactivated during a NE-SW extensional regime.
Author Keywords: Agadem block, tectono-sedimentary, tilted blocks, upper Cretaceous, Paleogene.
How to Cite this Article
Leyla Boubacar Hamidou, Mohamed Atmane Abdourahim, Aboulwahid Sani, Habsatou Ousmane, and Moussa Konaté, “Tectono-sedimentary evolution of the Termit basin (SE Niger),” International Journal of Innovation and Applied Studies, vol. 38, no. 3, pp. 592–604, January 2023.
