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International Journal of Technology Enhancements and Emerging Engineering Research (ISSN 2347-4289)
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International Journal of Technology Enhancements and Emerging Engineering Research  
International Journal of Technology Enhancements and Emerging Engineering Research

Website: http://www.ijteee.org

ISSN 2347-4289



Litho-Biostratigraphy And Paleoenvironment Of Synclinal Dukul Formation, Ne Nigeria.

[Full Text]

 

AUTHOR(S)

Uzoegbu M.U.

 

KEYWORDS

Keywords: Benue Trough, stratigraphy, sourc rock, biomicrite, foraminifera, paleoenvironment.

 

ABSTRACT

Abstract: The Upper Benue rift comprising the Gongola and Yola Basins in Nigeria consist of the Aptian-Albian Bima Formation. The Yolde Formation (Cenomanian-Turonian), Gongila/Pindiga/Dukul Formation (Turonian-Coniacian) and Gombe Formation (Campanian-Maastrichtian). The Dukul Formation is situated on latitudes 9°52'00" N to 9o45'00"N and longitudes 11050'00"E to 12o00'00"E. Shale from Turonian strata of the Dukul Formation has been characterized by stratigraphical and paleontological techniques. The aims of this study were to analyze the lithostratigraphy; determine the age and paleoenviroment of the formation; highlight its potential as a source rock and possibly briefly illustrate the petroleum systems within the region. The lithofacies of the unit is composed of shales with thin interbedded limestone that measures a few centimeters to a maximum of 1m, and siltstones. The section of the unit described at Dukul contains thicker beds of limestone when compared with the other sections from the area. There are two limestone sections; the basal limestone which measures about 2.2 m and an upper limestone bed intercalated between shales. The second limestone bed measures about 2.1 m. The limestones are grain supported and rich in bivalves and gastropods. The limestone have average thickness of about 0.5 m, they are grey and grain to mud supported. The shales have average thickness of 0.45 m. The siltstone beds occur near the top and at the base of the section. The limestones are rich in macrofossils as demonstrated by the frequency occurrence of bivalve shells and shell fragments. The presence of biomicritic limestone suggests deposition under low energy environments.

 

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