ISSN 1119-4618
 

Original Research 


Petroleum geochemistry of the Cretaceous Numanha Shales (Formation), Yola Sub-basin, Northern Benue Trough, NE Nigeria

Babangida M. Sarki Yandoka, Timothy P. Bata, Adebanji Kayode, Mohammed Kabiru.

Abstract
Petroleum geochemical characterisation of the Cretaceous Numanha Shales (Formation) Yola Sub-basin, Northern Benue Trough, northeastern Nigeria has been undertaken to provide an overview on the origin, richness, quality, hydrocarbon generation potential and paleodepositional conditions. The study is based kerogen pyrolysis, biomarkers, palynofacies and vitrinite refelctance. The total organic carbon (TOC) contents is generally below 1% and thus, classified the samples as having fair to relatively good source generative potential. The kerogen is predominantly of Type III and Type IV indicative of mainly gas with limited liquid hydrocarbon generating potential. Vitrinite reflectance, biomarkers and pyrolysis Tmax indicate that the samples are thermally mature and entered early mature to peak oil window stage. Molecular biomarkers indicates that the samples were deposited under suboxic marine environment with a major contribution of aquatic algae and microorganisms and significant amount of terrigenous organic matter input. This suboxic condition is recognized as one of the controlling factor for the organic matter preservation during the sedimentation. High concentrations of regular sterane C27, indicating suboxic conditions, typical of marine environment of deposition. The high thermal maturities experienced by the samples have influenced the nature of the organic matter thereby cracking them into thermogenic gas due to Tertiary volcanic intrusion konwn to be present in the Yola Sub-basin.

Key words: Source Rock; Geochemistry; Numanha Shales; Yola Sub-basin


 
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Pubmed Style

BMSY, TPB, AK, MK, . Petroleum geochemistry of the Cretaceous Numanha Shales (Formation), Yola Sub-basin, Northern Benue Trough, NE Nigeria . JPAS. 2019; 17(1): 1-9. doi:10.5455/sf.22316


Web Style

BMSY, TPB, AK, MK, . Petroleum geochemistry of the Cretaceous Numanha Shales (Formation), Yola Sub-basin, Northern Benue Trough, NE Nigeria . http://www.atbuscienceforum.com/?mno=22316 [Access: April 22, 2019]. doi:10.5455/sf.22316


AMA (American Medical Association) Style

BMSY, TPB, AK, MK, . Petroleum geochemistry of the Cretaceous Numanha Shales (Formation), Yola Sub-basin, Northern Benue Trough, NE Nigeria . JPAS. 2019; 17(1): 1-9. doi:10.5455/sf.22316



Vancouver/ICMJE Style

BMSY, TPB, AK, MK, . Petroleum geochemistry of the Cretaceous Numanha Shales (Formation), Yola Sub-basin, Northern Benue Trough, NE Nigeria . JPAS. (2019), [cited April 22, 2019]; 17(1): 1-9. doi:10.5455/sf.22316



Harvard Style

, B. M. S. Y., , T. . P. B., , A. K., , M. K. & (2019) Petroleum geochemistry of the Cretaceous Numanha Shales (Formation), Yola Sub-basin, Northern Benue Trough, NE Nigeria . JPAS, 17 (1), 1-9. doi:10.5455/sf.22316



Turabian Style

, Babangida M. Sarki Yandoka, Timothy P. Bata, Adebanji Kayode, Mohammed Kabiru, and . 2019. Petroleum geochemistry of the Cretaceous Numanha Shales (Formation), Yola Sub-basin, Northern Benue Trough, NE Nigeria . Science Forum (Journal of Pure and Applied Sciences), 17 (1), 1-9. doi:10.5455/sf.22316



Chicago Style

, Babangida M. Sarki Yandoka, Timothy P. Bata, Adebanji Kayode, Mohammed Kabiru, and . "Petroleum geochemistry of the Cretaceous Numanha Shales (Formation), Yola Sub-basin, Northern Benue Trough, NE Nigeria ." Science Forum (Journal of Pure and Applied Sciences) 17 (2019), 1-9. doi:10.5455/sf.22316



MLA (The Modern Language Association) Style

, Babangida M. Sarki Yandoka, Timothy P. Bata, Adebanji Kayode, Mohammed Kabiru, and . "Petroleum geochemistry of the Cretaceous Numanha Shales (Formation), Yola Sub-basin, Northern Benue Trough, NE Nigeria ." Science Forum (Journal of Pure and Applied Sciences) 17.1 (2019), 1-9. Print. doi:10.5455/sf.22316



APA (American Psychological Association) Style

, B. M. S. Y., , T. . P. B., , A. K., , M. K. & (2019) Petroleum geochemistry of the Cretaceous Numanha Shales (Formation), Yola Sub-basin, Northern Benue Trough, NE Nigeria . Science Forum (Journal of Pure and Applied Sciences), 17 (1), 1-9. doi:10.5455/sf.22316