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Palynology And Paleoenviromental Study Of Akukwa-1 Well, Niger Delta And Anambra Basins, Nigeria
[Full Text]
AUTHOR(S)
Soronnandi-Ononiwu, G.C., Omoboriowo, A.O., Yikarebogha Y., Chiaghanam O.I.,
KEYWORDS
ABSTRACT
ABSTRACT: A sequence biostratigraphic study of Upper Cretacerous to Tertiary sediment of part of Anambra and Niger Delta basins were carried out using sample from three exploration wells and outcrops located in the basins. Akukwa-1 (1000ft – 7990ft). The wells penetrated key stratigraphic units in the Anambra Basin (the Nkporo, Mamu, Nsukka) and those of the proto Niger Delta (Imo and Ameki).. Akukwa yielded (21 genera and 100 species of palynomorphs), The paleo-environment of deposition were determined to range from lithoral to proximal offshore in a shallow marine setting. A detailed categorization of the palynomorphs into terrestrially derived palynomorphs and marine derived palynomorphs based on the distribution of three broad vegetation type; mangrove, fresh water swamps and hinterland community were used to evaluate sea level fluctuations with respect to sediments deposited in the basin and linked to a particular depositional system tracts
REFERENCES
[1]. Adegoke, O. S., 1977. Stratigraphy and Paleontology of the Ewekoro Formation (Paleocene) of South Western Nigeria. Bull. Amer. Paleont., 71, no. 295, pp. 36.
[2]. Adeleye, D. R., 1975. Nigerin Late Cretaceous stratigraphy and paleogeography. A.A.P.G. Bull., V.59, No.12, pp. 2302 – 2313.
[3]. Agagu. O. K., Fayose, E. A. and Peters S. W., 1985. Stratigraphy and sedimentology of the SenonianAnambra Basin of eastern Nigeria. Jour. Min. Geol.Vol.23, pp. 25-36.
[4]. Agagu, O. K, and Ekweozor, C. M., 1982. Source rock characteristics of Senomanian shales in the Anambra Basin of Eastern Nigeria. Journal of Mining and Geology V.19, pp. 52 – 61.
[5]. Awad, M. Z., 1994. Stratigraphic, palynological and paleoecological studies in the East – Central Sudan (Khartown and Kosti Banns), Late Jurassic to Mid Tertiary. Berliner Geowissenschafliche Abhandlungen (A), 161, 163p.
[6]. Bandy, O.L., 1960. General correlation of foraminiferal structure with environment, - 21st Intern. Geol. Congr: Copenhagen Rept; part 22; pp.7 – 19.
[7]. Costa, L. I. and Downie, C. 1976. The distribution of the dinoflagellate Kletzeliella in the paleogene of northwestern Europe, Paleontology, 19, 591, 614, Pl.92.
[8]. Edet J. J., 1992. Palynostratigraphy of Late Cretaceous (Late Campanian-Early Masstrichitian) Sections in the Anambra Basin, Nigeria. Revista Espanola de Micropaleontologia Vol. XXIV, No. 2, 1992, pp. 3-18.
[9]. Hansen, J. M., 1977. Dinoflagellate stratigraphy and echinoid distribution in the Upper Maastrichtian and Danian deposits from Denmark. Geological society of Denmark Bulletin, vol, 26, pp. 1 – 26.
[10]. Harland, R, 1978. Dinoflagellates cysts and acritarchs from the Bearpaw Formation (Upper Campanian) of southern Alberta, Canada. Paleontology, 16, pp. 665 – 706
[11]. Hammen Th. Van Der 1956. Description of some genera and Species of Fossil Pollen and Spores. Bol. Geol., 4 2-3; pp. 111-117.
[12]. Jan du Chene, R. 1980. Palynological study of the Tar sand, Upper Maastrichtian of the Southwest Nigeria. Proceddings 4th International palynological conference (1976 - 77) 2, pp. 794 – 799.
[13]. Adegoke, O S., Adediran S. A and Petters S. W., 1978. Palynology and Foraminifera of the Lokoja Sandstone (Maastrichian) BidaBasine, Nigeria- Rev.EspMicropal., 10, 3. pp. 379-393.
[14]. May, F. E, 1980. Dinoflagellate cysts of Gymnodiniaceae, Peridiniaceae and Gonyanlacea from the upper Cretaceous Mon-mouth Group, Atlantic Highlauds, New Jersey. Paleontolographical Abstr. B., 72, 1 – 4, pp. 10 – 116
[15]. Miall, A. D. 1990. Principles of sedimentary basin analysis Springer Verlag, NW York, 667pp.
[16]. Muller J., 1968. Palynology of the Pedawan and Plateau Sandstone Formations (Cretaceous - Eocene) in Srarwak, Malayca. Micropaleontology 14, no.1, 1-37, pp. 1-5.
[17]. Oloto, I. N., 2009. Palynology and sequence stratigraphy: case study from Nigeria. Legacy Integrations (Nig.) Limited. ISBN: 978-978-907-646-8.
[18]. Ojo, O. J and Akande, S.O, 2004. Palynological and Palaeoenvironmental studies of Gombe Formation, Gongola Basin, Nigeria Journal of Mining and Geology, V. 40, pp. 143 – 149.
[19]. Schrank, E., 1994. Palynology of the Yessoma Formation in northern Somalie. A study of the pollen, spores and associated phytoplankton from the Late Cretaceous Palmae Province. Paleontographica Abt. B, 231, pp. 63 – 112
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