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Article Number - A15BC4D55582


Vol.12(2), pp. 74-83 , February 2018
https://doi.org/10.5897/AJEST2013.1562
ISSN: 1996-0786


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Full Length Research Paper

Foraminiferal analysis and palaeoenvironmental interpretation of borehole ET (BH-ET) in the Calabar Flank, South-eastern Nigeria



Ukpong A. J.
  • Ukpong A. J.
  • Department of Geology, University of Calabar, Calabar, Cross River State, Nigeria.
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Dibi T. I.
  • Dibi T. I.
  • Department of Geology, University of Calabar, Calabar, Cross River State, Nigeria.
  • Google Scholar
Okon E. E.
  • Okon E. E.
  • Department of Geology, University of Calabar, Calabar, Cross River State, Nigeria.
  • Google Scholar
Iwara E. E.
  • Iwara E. E.
  • Department of Geology, University of Calabar, Calabar, Cross River State, Nigeria.
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 Received: 14 July 2013  Accepted: 07 June 2016  Published: 28 February 2018

Copyright © 2018 Author(s) retain the copyright of this article.
This article is published under the terms of the Creative Commons Attribution License 4.0


Foraminiferal biostratigraphy and palaeoenvironmental interpretation was carried out on core samples (5 samples between intervals 5-55 m) recovered from borehole ET (BH-ET) located in Etankpini area of the Calabar Flank, south eastern Nigeria. Lithologic description of the borehole samples were carried out and the borehole was sampled at 5 m interval. The samples were later composited at 10 m interval and a total of six samples were subjected to standard micropaleontological preparation procedures. Results from the lithologic analysis show that the basal section of the well (55-60 m) was made up of granite gneiss; overlain by light grey, calcarenite, bioclastic, pisolitic and stylolitic limestones (30-55). Dark grey fissile shales directly overlie the limestone (5-30 m). The foraminiferal recovery was generally low and characterized by planktonic species (Guembelitria harrisi, Hedbergella crassa, Hedbergella delrioensis, Hedbergella simplicissima, Hedbergellid spp., Heterohelix globulosa, Heterohelix planata, Heterohelix reussi, Hedbergella planispira and Hedbergella sigali). The absence of benthonic forms may be an indication of anaerobic bottom conditions. An age of Cenomanian-Early Turonian was assigned to the studied well based on diagnostic foraminiferal species assemblages. The recovered foraminiferal assemblage points to deposition within the Inner Neritic to Middle Neritic depositional setting for the studied well.

 

Key words: Neritic, Calabar Flank, biostratigraphy, planktonic, anaerobic.

Adeleye DR, Fayose EA (1978). Stratigraphy of the type section of Awi Formation. J. Min. Geol. 15:30-57.

 

Akpan EB (1985). Ichnology of the Cenomanian-Turonian of the Calabar Flank, S.E. Nigeria. Geol. en Mijnbouw. 64:365-372.

 
 

Akpan EB (1992). Peruviella dolium (Roemer) and the age of the Mfamosing Limestone, SE Nigeria. J. Min. Geol. 28:191-196.

 
 

Akpan EB (1996). Faunal evidence of an exaerobic marine condition in the Cenomanian sediments of Southeastern, Nigeria. J. Min. Geol. 32:73-75.

 
 

Armstrong MD, Braisier MD (2005). Microfossils. Blackwell Publishing: Ltd. London. 296p.

 
 

Bassey EC (1991). Cretaceous foraminiferal biostratigraphy of the subsurface of the Calabar Flank. Ph.D. Dissertation University of Calabar, Calabar, Nigeria.

 
 

Boboye OA, Okon EE (2014). Sedimentological and geochemical characterization of the Cretaceous strata of Calabar Flank, southeastern Nigeria. J. Afr. Ear. Sci. 99:427-441.
Crossref

 
 

Dessauvagie TFJ (1965). Preservation of Trocholina (Foraminifera) in the Limestone of Odukpani Formation of South-eastern Nigeria. J. Min. Geol. 2:57-64.

 
 

Dessauvagie TFJ (1968). Cenomanian Trocholina from Nigeria. Micropal. 14(1):64-72.
Crossref

 
 

Dessauvagie TFJ (1974). Geological map of Nigeria. (1:1,000,000). Nigeria Mining and Geological Society.

 
 

Edet JJ, Nyong EE (1993). Depositional environments, sea level history and paleobiogeography of the Late Campanian - Maastrichtian on the Calabar Flank, SE Nigeria. Paleogeogr. Paleoclim. Paleoecol. 102:161-175.
Crossref

 
 

Ehinola OA, Sonibare, OO, Javie DM, Oluwole EA (2008). Geochemical Appraisal of Organic matter in the Mid-Cretaceous Sediments of the Calabar Flank, South-eastern Nigeria. Eur. J. Sci. Res. 23(4):567-577.

 
 

Ekpo BO, Essien NU, 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.
Crossref

 
 

Essien NU, Ukpabio EJ, Nyong EE, Ibe KA (2005). Preliminary Organic geochemical appraisal of Cretaceous rock units in the Calabar Flank; J. Min. Geol. 41(2):185-191.

 
 

Essien NU, Ufot DO (2010). Age of Mfamosing Limestone, Calabar Flank, southeastern Nigeria. Int. J. Basic Appl. Sci. 10(5):8-19.

 
 

Murat RC (1972). Stratigraphy and paleogeography of the Cretaceous and Lower Tertiary in Southern Nigeria. In: Dassauvagie, T. F. J. and Whiteman, A. J. (Eds.), Africa Geology, Ibadan 1970. Geol. Dept. Univ. Ibadan, Nigeria. pp. 251-266.

 
 

Njoh OA (2008). Upper Cretaceous foraminiferal biostratigraphic correlations: Douala and Rio Del Rey Basins. (S.W. Cameroon) and the Calabar Flank (S.E. Nigeria). PhD Dissertation. University of Calabar, Calabar, Nigeria.

 
 

Njoh OA, Nkeme UU, Petters SW (2009). Lower Tertiary foraminiferal from subsurface sediments in the Calabar Flank, southeastern Nigeria. Int. J. Appl. Sci. 4(1):35-42.

 
 

Nyong EE (1995). Cretaceous sediments in the Calabar Flank. In: B. N. Ekwueme; E. E. Nyong and S. W. Petters (Eds.). Geological excursion guidebook to Oban Massif, Calabar Flank and Mamfe Embayment, Southeastern Nigeria. Nigeria Mining and Geosciences society 31st Annual Conference, Calabar, March 12-16 pp. 14-25.

 
 

Nyong EE, Ramanathan R (1985). A record of oxygen-deficient paleoenvironments in the Cretaceous of the Calabar Flank, SE Nigeria. J. Afr. Earth Sci. 3(4):455-460.
Crossref

 
 

Pessagno EA (1967). Upper Cretaceous planktonic foraminifera from the western Gulf Coastal Plain. Paleontol. Am. 5(37):245- 445.

 
 

Petters SW (1977). Bolivinoides evolution and upper Cretaceous biostratigraphy of the Atlantic Coastal plain of New Jersey. J. Paleontol. 51(5):1023-1036.

 
 

Petters SW (1978). Mid-Cretaceous paleoenvironments and biostratigraphy of the Benue Trough, Nigeria. Geol. Soc. Am. Bull. 89:151-154.
Crossref

 
 

Petters SW (1980). Biostratigraphy of the Upper Cretaceous foraminifera of the Benue Trough, Nigeria. J. Foram. Res. 10(3):191-204.
Crossref

 
 

Petters SW (1981). Caves and Lower Karsts near Calabar, Nigeria. Nigerian Field Soc. Bull. 46:9-20.

 
 

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.

 
 

Reijers TJA, Petters SW (1997). Sequence stratigraphy based on microfacies analysis: Mfamosing Limestone, Calabar Flank, Nigeria. Geol. en. Mijnbouw. 76:197-215.
Crossref

 
 

Reyment RA (1955). The Cretaceous ammonite of the Southern Nigeria and Southern Cameroon. Bull. Geol Surv. Nig. 25:112-119.

 
 

Reyment RA (1956). On the stratigraphy and paleontology of the Cretaceous of the Nigeria and Cameroons, British West Africa. Geologia forentia Stockholm Forthenche. 78:17-96.

 
 

Reyment RA (1959). The foraminifera genera Afrobolivina, new species and Bolivina in the Upper Cretaceous and Lower Tertiary of West Africa. Stockholm Contrib. Geol. 3:1-57.

 
 

Reyment RA (1965). Aspects of the Geology of Nigeria. Ibadan University. Press, Ibadan, Nigeria. P 145.

 
 

Ukpong AJ, Njoh OA, Ushundebe,MA (2008). Foraminiferal biostratigraphy of the upper part of the Type- section of Ekenkpon Formation, Calabar Flank, South-eastern Nigeria. Int. J. Nat. Appl. Sci. 3(1,2):28-34.

 

 


APA Ukpong, A. J., Dibi, T. I., Okon, E. E., & Iwara, E. E. (2018). Foraminiferal analysis and palaeoenvironmental interpretation of borehole ET (BH-ET) in the Calabar Flank, South-eastern Nigeria. African Journal of Environmental Science and Technology , 12(2), 74-83.
Chicago Ukpong A. J., Dibi T. I., Okon E. E. and Iwara E. E.. "Foraminiferal analysis and palaeoenvironmental interpretation of borehole ET (BH-ET) in the Calabar Flank, South-eastern Nigeria." African Journal of Environmental Science and Technology 12, no. 2 (2018): 74-83.
MLA Ukpong A. J., et al. "Foraminiferal analysis and palaeoenvironmental interpretation of borehole ET (BH-ET) in the Calabar Flank, South-eastern Nigeria." African Journal of Environmental Science and Technology 12.2 (2018): 74-83.
   
DOI https://doi.org/10.5897/AJEST2013.1562
URL http://www.academicjournals.org/journal/AJEST/article-abstract/A15BC4D55582

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