New insights into tectonostratigraphy and structural style of the Late Cretaceous sediments of Gongola Basin, Northern Benue Trough, NE Nigeria

DOI: https://doi.org/10.33003/jobasr-2023-v1i1-19

Edwin Ocheni Ekwo.

Babangida M. Sarki Yandoka.

Abstract
Tectonostratigraphy of the Gongola Basin is still least understood. This study aims to present a new insight into tectonic evolution and structure of Gongola Basin based on field geology. The study revealed that sedimentation processes commenced in the depression created by tectonic subsidence as a result of Early Cretaceous tectonic events, which affected the basin and subsequently, reactivated the Santonian/Maastrichtian compression. The sediments were affected by Santonian and Maastrichtian compressions resulting in synsedimentary deformation and post-depositional faulting and folding. The imprints of dextral strike-slip faults and reverse faults on pre-Maastrichtian and Maastritchtian sediments formed as a result of reactivation of the pre-Santonian and Santonian faults. Active rifting phase followed by uplift and subaerial exposure as in Gombe inlier, and adjacent areas such as Teli Fault, Kaltungo, Burashika inliers followed by subsidence allowing for initial deposit of continental sediments and later, marine ingression which causes a change from continental to marine environments during Cenomanian. Eustatic adjustment in Late-Cenomanian to Early-Turonian led to first major transgression and shortregressive phase in middle Turonian-early Santonian. Mid-Santonian compression folded the sediments and was followed by subaerial erosion of parts of the folded sediments. Another eustatic adjustment in Late-SantonianCampanian led to a short-lived transgression. A gradual retreat of the sea in the Maastrichtian resulted in progradation of Gombe Sandstone. Late Maastrichtian compression in end-Cretaceous tectonic event folded and tilted Gombe Sandstone, responsible for the angular unconformity that existed between Gombe Formation and overlying Paleocene sediments of Kerri-Kerri Formation, mostly restricted to NW of the basin.
References
Abubakar, M.B. (2006). Biostratigraphy, Paleoenvironment and Organic Geochemistry of the Cretaceous Sequences of the Gongola Basin, Upper Benue Trough, Nigeria. Unpublished Ph.D Thesis, Abubakar Tafawa Balewa University, Bauchi, Nigeria. Abubakar, M.B., Dike, E.F.C., Bukar, S., and Tukur, A. (2006). Lithostratigraphy and paleoenvironments of deposition of Yolde Formation of the Gongola Basin, Upper Benue Trough, Nigeria. Nig. Min. Geosci. Soc. 42nd Annual International Conference, Kaduna, Abstract Vol, pp. 48. Ajakaiye, D.E (1981) A gravity interpretation of the Benue Trough, Nigeria. Tectonophysics, v. 79, p. 109 - 128. Doi.org/10.1016/50899-5362(85)80089 Ajakaiye, D.E.(1986) Aeromagnetic anomalies in and around the Benue Trough, Nigeria. Nature; vol.319, No.6054, pp. 582-584. Allix, P. (1983). Enviroments Mesozoiques de la partie nord-oreintale du fosse de la Benoue (Nigeria): stratigraphie, sedimentologie, evolution geodynamique. In: Popoff, M., Wiedmann, J. and Klasz, I. (1986). The Upper Cretaceous Gongila and Pindiga Formations, Northern Nigeria: subdivisions, age, stratigraphic correlation and paleogeographic implications. Eclogae Geol. Helv., 79, 343-363. DOI: 10.12691/jgg-1-1-3 Benkhelil, J. (1986) Structure et Evolution geodynamique du basin intracontinental de la Benoue (Nigeria). These de Doctorat d’Etat. University of Nice, 226p. Benkhelil, J. (1989). The origin and evolution of the Cretaceous Benue Trough, Nigeria. Journ. Afr. Earth Sci. 8, 251 – 282 https://doi.org/10.1016/S0899- 5362(89)80028-4 Benkhelil J. and Robineau, B. (1989)“ Le Fosse de la Benoue Est-il un Rift?” In: J. Benhkelil, M.Guiraud, J.F.Posard and I. Saugy, Eds.The Bornu-Benue Trough, the Niger Delta and its offshore: tectono-sedimentary reconstruction during the Cretaceous and Tertiary from geophysical data and geology. In: Kogbe, C.A (2nd Ed.). Geology of Nigeria. Rock View Nig. Ltd. (publ), Jos, Nigeria, 277-310 Burke, K.C., Dessauvagie, T.F.J. and Whiteman, A. J. (1970) Geological History of the Benue Valley and Adjacent Areas. Ibadan. University Press, Ibadan, Pp. 187 – 205 https://doi.org/10.1016/B978-0-444-41549- 3.50011-6 Carter, J.D., Barber, W.and Tait, E.A, (1963) Geology of Parts of Adamawa, Bauchi and Borno Provinces in the Northeastern Nigeria. Geological Survey of Nigeria. Bulletin 30: Pp. 1-109. Cratchley,C.R. and Jones, J.P. (1965) An Interpretation of the geology and gravity anomalies of the Benue valley, Nigeria. Overseas Geol. Surveys Geophysical Paper, 1, 1- 26 Einsele,G.(1991) Submarine mass flow deposits and turbidites. In: cycles and events in Stratigraphy (Ed. by G. Einsele, W.Ricken and A. Seilacher), pp. 313-339. Springer-Verlag, Berlin. 10.2.3. Ekwo, E.O. (2017). Tectonostratigraphy, facies distribution and depositional environments of Late Cretaceous sediments of Gongola Basin, Northern Benue Trough, northeastern Nigeria. PhD unpublished Thesis, Abubakar Tafawa Balewa University, Bauchi, 201p. Fairhead J.D. and Green, C.M. (1989) Controls on rifting in Africa and the regional tectonic model for the Nigeria and East Niger rift basins. J. Afr. Earth. Sci., v.8, p. 231- 249. https://doi.org/10.1016/0040-1951(88)90265-X Grant, N.K. (1971). The South Atlantic Benue Trough and Gulf of Guinea Cretaceous Triple Junction. Geol. Soc. Amer. Bull., 82, 2259 - 2298. https://doi.org/10.1130/0016- 7606(1971)82[2295:SABTAG]2.0.CO;2 Guiraud,R.M. (1990) Tectono-sedimentary framework of the Early Cretaceous continental Bima Formation (Upper Benue Trough, NE Nigeria). Jour. Afr. Earth Sci. 10, 341 -353. https://doi.org/10.1016/0899-5362(90)90065-M Guiraud, R.M. (1993) Late Jurassic rifting - Early Cretaceous Rifts of Western and Central Africa: an Overview. Tectonophysics, 213, 153 - 168 https://doi.org/10.1007/978-3-030-11295-0_5 Hoque, M. and Nwajide, C.S. (1985) Application of Markov chain and entropy analysis to lithologic succession: an example from the Cretaceous of the Benue Trough (Nigeria). Geolog. Rundschau, v.74, p. 165-172. https://doi.org/10.1007/BF01764578 King, L.C. (1950) Outline and Distribution of Gondwanaland. Geol. Mag., 87, 353 -359. Maurin J.C. (1985) Occurrence of Alkaline granite in the granitic uplift block of Kaltungo area, Upper Benue (Nigeria). J. African Earth Sci. Abstract, 3, 276. Maurin, J.C.(1986) Analyse de sones decrochantes dans le fosse de la Benoue (Nigeria) et systematiques U-Pb et Pb-Pb appliqués aux mineralisations uraniferes et Pb-Zn associees. These Univ. Montepellier II, 211 pp. https://doi.org/10.1016/0040-1951(92)90256-6 Obaje, N.G,.and Hamza, H. (2000) Liquid hydrocarbon source-rock potential of mid-Cretaceous coals and coal measures in the Middle Benue Trough of Nigeria. Int. Jour. Earth. Sci., 89, 130 - 139. https://doi.org/10.1007/s005310050321 Rebelle M. (1990) The marine transgression in the Benue Trough (NE Nigeria): a paleogeographic interpretation of the Gongila Formation. Journal of African Earth Sciences, 10(4): 643-655. doi:10.1016/0899- 5362(90)90031-9 Sarki Yandoka, B.M., Abubakar, M.B., Abdullah, W.H., Amir Hassan, M.H., Adamu, B.U., Jitong, J.S., Aliyu, A.H. and Adegoke, A.A. (2014) Facies analysis, paleoenvironmental reconstruction and stratigraphic development of the Early Cretaceous sediments (Lower Bima Member) in the Yola Sub-basin, Northern Benue Trough, NE Nigeria. Journal of African Earth Science. 96, pp 168-179. https://doi.org/10.1016/j.jafrearsci.2014.04.007 Stoneley R. (1966), The Niger Delta Region in the Light of hte Theory of the Continental Drift. Geol. Mag., 103, 385 - 397. Thiessen, R., Burke, K. and Kidd, W.S.F. (1979) African hotspots and their relation to the underlying mantle. Geology 7, 263-266. Wright, J.B. (1976) Origin of the Benue Trough: a Critical Review. In: Kogbe, C.A. (ed.) Geology of Nigeria. Elisabethan Publ.Co., Lagos, pp. 309 – 317. Doi.org/10.1016/0040-1951(76)90093-7 Zaborski, P.M. (1998) An Introduction to the petroleum potential of Niger. Jour. Petrol. Geol., 21(1), 83-103. DOI: 10.4236/ojg.2021.119021 Zaborski, P.M, Ugodulunwa, F., Idornigie, A., Nnabo, P. and Ibe, K. (1997) Stratigraphy and structure of the Cretaceous Gongola Basin, Northeast Nigeria. Bull. Centre Rech.Epl. Prod.,21(1) , 153 – 185 DOI: 10.12691/jgg-2-3-2 Zaborski, P.M. (1998) A review of the Cretaceous system in Nigeria. African Geoscience Rev., 5, 385 – 483. DOI: 10.4236/ojg.2021.119021
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