Assessment of crustal structures by gravity and magnetic methods in the Calabar Flank and adjoining areas of Southeastern Nigeria—a case study

Adeleye DR, Fayose FA (1978) Stratigraphy of the type section of Awi formation, Odukpani area, southern Nigeria. Journal of Mining Geology 15:33–57 Adetona AA, Abu M (2013) Estimating the thickness of sedimentation within Lower Benue Basin and Upper Anambra Basin, Nigeria, using both spectral depth determination and source parameter imaging. Hindawi Publishing Corporation ISRN Geophysics Volume, Article ID 124706, 10 pages Adighije CI (1981) A gravity interpretation of the Benue trough, Nigeria. Tectonophysics 79(1981):109–128 Ajayi CO, Ajakaiye DE (1981) The origin and peculiarities of the Nigerian Benue trough: another look from recent gravity data obtained from the middle Benue. Tectonophysics 80:285–303 Akpan EB (1992) Peruviella dolium (Roemer) and the age of the Mfamosing limestone, SE Nigeria. J Min Geol 28:191–196 Akpan AE, Ebong DE, S E, Joseph S (2014) Geophysical and geological studies of the spread and industrial quality of Okurike barite deposit. Am J Environ Sci 10(6):566–574 Allen JRL (1965) Late Quatenary Niger Delta and adjacent areas: sedimentary environment and lithofacies. American Association of Petroleum Geologists 49:549–600 Avbovbo AA (1978) Geothermal gradients in southeastern Nigerian basin. Bulletin Canadian Association of Petroleum Geologists 26:269–274 Benkhelil MG, Ponsard JF, Saugy L (1975) 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 CA (ed) Geology of Nigeria. Elizabethan Press, Lagos, pp 277–309 Burke KCA, Dewey JF (1974) Two plates in Africa during the cretaceous. Nature 249:313–316 Burke KC, Whiteman AJ (1972) Uplift, rifting and the break up of Africa. In: Tarling DA, Runcorn SK (eds) Implications of continental drift on the earth sciences. Academic Press, London, pp 735–755 Burke KC, Whiteman AJ (1973) Uplift, rifting and the break-up of Africa. In: Tarling DH, Runcorn SK (eds) Implications of continental drift to the earth sciences. Academic Press, London, pp 735–755 Burke, K.C.A., Dessauvagie, T.F.W., Whiteman, A.J., 1971. Opening of the gulf of Guinea and geological history of the Benue depression and Niger Delta. Nature, 233: 51–5 5 Cratchley CR, Jones JP (1965) An interpretation of the geology and gravity anomalies of the Benue Valley, Nigeria. Overseas Geol Surv Geophys Pap 1:26 Ehinola OA, Sonibare OO, Javie DM, Oluwale EA (2008) Geochemical appraisal of organic matter in the mid-cretaceous sediments of the Calabar flank, southeastern Nigeria. Eur J Sci Res 23(4):567–577 Ekpo BO, Ibok UJ, Essien N, Wehner H (2012) Geochemistry and organic petrography of cretaceous sediments of the CalabarFlank, southeastern, Nigeria. Mar Pet Geol 35:252–268 Ekpo BO, Essien N, Fubara EP, Ibok UJ, Ukpabio EJ, Wehner H (2013) Petroleum geochemistry of cretaceous outcrops from the Calabar flank, southeastern Nigeria. Mar Pet Geol 48:171–185 Ekwok SE, Akpan AE, Ebong DE (2019) Enhancement and modelling of aeromagnetic data of some inland basins, southeastern Nigeria. J Afr Earth Sci 155:43–53. https://doi.org/10.1016/j.jafrearsci.2019.02.03 Ekwok SE, Akpan AE, Kudamnya EA (2020a) Exploratory mapping of structures controlling mineralization in Southeast Nigeria using high resolution airborne magnetic data. Journal of African Earth Sciences. Journal of African Earth Sciences. https://doi.org/10.1016/j.jafrearsci.2019.103700 Ekwok SE, Akpan AE, Kudamnya EA, Ebong DE (2020b) Assessment of groundwater potential using geophysical data: a case study in parts of Cross River State, south-eastern Nigeria. Applied Water Science (2020) 10:144. https://doi.org/10.1007/s13201-020-01224-0 Ekwueme, B.N., Nyong, E.E., Petters, S.W., 1995. Geological excursion guidebook to Oban Massif, Calabar Flank and Mamfe embayment, Southeastern, Nigeria. 1st Edn., Dechord Press, Calabar, ISBN-10: 9783235427, pp: 36 Essien NU, Ukpabio EJ, Nyong EE, Ibe KA (2005) Preliminary organic geochemical appraisal of cretaceous rock unit in the Calabar flank, southern Nigeria. J Min Geol 41(2):181–191 Esu EO, Owolabi OM, Ikpang EN (2009) Preliminary 697 source rock potential evaluation and 698 depositional environmental reconstruction of Ekenkpon Shales, Calabar Flank, southeastern, Nigeria. 46th Annual International Conference of the Nigerian Mining and Geosciences Society (NMGS) Hinze WJ (2003) Bouguer reduction density: why 2.67? Geophysics. 68(5):1559–1560 Hospers J (1965) Gravity field and structure of the Niger Delta, Nigeria, West Africa. Geol Soc Am Bull 76:407–422 Lawal KM, Akaolisa CZ (2006) Bouguer correction density determined from fractal analysis using data from part of the Nigerian basement complex. Nigerian Journal of Physics 18(2):251–254 Lowrie W (1997) Fundamentals of geophysics. Cambridge University Press, Cambridge, MA Murat RC (1972a) Stratigraphy and paleogeography of the cretaceous and lower tertiary in southern Nigeria. In: Dessauvagie TFJ, Whiteman AJ (eds) African geology, Ibadan 1970. Geol. Dept. Univ. of Ibadan, Nigeria, pp 251–266 Murat RC (1972b) Stratigraphy and paleogeography of the cretaceous and lower tertiary in southern Nigeria. In: Dassauvagie TFJ, Whiteman AJ (eds) Africa geology, Ibadan 1970. Geol. Dept. Univ. Ibadan, Nigeria, pp 251–266 Nton ME, Akpan OS, Adamolekun OJ (2017) Geochemistry of Ekenkpon and Nkporo shales, Calabar flank, southeastern Nigeria: implications for provenance, transportation history and depositional environment. Glob J Geol Sci 16:63–78 Nwachukwu SO (1972) The tectonic evolution of the southern portion of the Benue Trough. Nigeria Geol Mag 109:411–419 Nwachukwu JI (1976) Approximate geothermal gradient in Niger delta sedimentary basin. American Association of Petroleum Geologist Bulletin 60:1073–1077 Nyong EE (1995) Geological excursion guide book to Calabar Flank and Oban Massif. In the 31st Annual conference of the Nigerian Mining and Geosciences Society, Calabar, March 12–16 Nyong EE, Ramanathan RM (1985) A record of oxygen-deficient paleoenvironments in the cretaceous of the Calabar flank, SE Nigeria. J Afr Earth Sci 3(4):455–460 Odumodu CF (2012) Temperatures and geothermal gradient fields in the Calabar flank and parts of the Niger Delta, Nigeria. Petroleum Technology Development Journal 2(2) Ofoegbu CO (1984) A model of the tectonic evolution of the Benue trough of Nigeria. Geol Rundsch 73(3):1007–1018 Okiwelu AA, Okwueze EE, Akpabio IO (2009) The Bouguer gravity anomaly map of the Calabar flank, southeastern, Nigeria. Pac J Sci Technol 10:656–662 Okon-Umoren, O.E., 1999. Geophysical studies of the Calabar Flank of South – Eastern. Unpublished Ph.D Thesis, Department of Physics, University of Calabar, 360–366 Perch-Nielson K, Petters SW (1981) Cretaceous and Eocene microfossil ages, from the Southern Benue Trough, Nigeria. Paleontographica (125) 2 102–120 Petters SW, Ekweozor CM (1982) Petroleum geology of Benue trough and southeastern Chad Basin, Nigeria. American Association of Petroleum Geology 66(S):1141–1149 Petters SW, Nyong EE, Akpan EB, Essien NU (1995) Lithostratigraphic revision for the Calabar Flank, S. E. Nigeria. Proceedings of the 31st Anniversary conference of Nigeria Mining and Geosciences Society, Calabar Petters SW, Zaborski PMP, Essien NU, Nwokocha KD, Inyang DO (2010) Geological excursion guidebook to the Cretaceous of the Calabar Flank, Southeast Nigeria. Nigerian Mining and Geosciences Society 46th Annual Conference ‟Calabar 2010″. Shamber Grafitech Studio. 28p Ramanathan RM, Fayose FA (1990) Cretaceous transgressions and regression in Calabar Flank, S. E. Nigeria. In: Ofoegbu CO (Ed) The Benue Trough Structure and Evolution. Stutgatt: Viewg and Sohn Reijers TJA, Petters SW (1987) Depositional environments and diagenesis of albian carbonates on the Calabar flank, SE Nigeria. J Petrol Geol 10(3):283–294 Reyment RA (1965) Aspects of the geology of Nigeria, Ibadan University. Press, Ibadan, 445 Short KC, Stauble AJ (1967) Outline of geology of Niger Delta. AAPG Bull 51:761–779 Telford WM, Gildart LP, Sheriff RE (1990) Applied geophysics (second edition). Cambridge University Press, Cambridge, UK., 62–135 Ukpong AJ, Dibi TI, Okon EE, Iwara EE (2016) Foraminiferal analysis and palaeoenvironmental interpretation of borehole ET (BH-ET) in the Calabar flank, South-Eastern Nigeria. Afr J Environ Sci Technol 12(2):74–83