ISSN 1119-4618
 

Original Research 


Pyrolysis analysis, organic petrology and thermal effects of volcanics on Bima Formation shales, Yola Sub-basin, Northern Benue Trough, Nigeria

Mohammed Yerima Kwaya, Babangida M. Sarki Yandoka.

Abstract
The shale sediments of Bima Formation from the Yola Sub-basin of the Northern Benue Trough, northeastern nigeria were studied based on pyrolysis analysis (rock-eval pyrolysis) and organic petrology (vitrinite reflectance and palynofacies) to determine the thermal effects of Tertiary (Neogene) volcanics on the organic matter thermal maturity. The study revealed that shale samples are of Type III and Type IV kerogens. This indicates high thermal maturity level and classified the samples as late-oil window to post-mature stage of hydrocarbon generation. This high thermal maturity could be attributed due to the Tertiary volcanic intrusion in most part of the basin. The samples however, appeared as a good source of oil- and gas-prone hydrocarbons. This study therefore, suggests that, the initial oil and gas-prone of the Type II and II-III kerogens in the shales have been cracked into thermogenic gas probably due to the high thermal effects of Tertiary volcanic intrusion in the basin. This has yield the present-day Types III and IV kerogens. The volcanic plugs however, intruded the Cretaceous sedimentary successions of the Northern Benue Trough during the Tertiary period and as such, they enhanced thermal maturity of the organic matters within the shale samples.

Key words: Pyrolysis; Organic Petrology; Volcanics; Thermal Maturity; Bima Formation


 
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How to Cite this Article
Pubmed Style

Kwaya MY, Yandoka BMS, . Pyrolysis analysis, organic petrology and thermal effects of volcanics on Bima Formation shales, Yola Sub-basin, Northern Benue Trough, Nigeria. JPAS. 2020; 20(1): 71-80. doi:10.5455/sf.75006


Web Style

Kwaya MY, Yandoka BMS, . Pyrolysis analysis, organic petrology and thermal effects of volcanics on Bima Formation shales, Yola Sub-basin, Northern Benue Trough, Nigeria. http://www.atbuscienceforum.com/?mno=75006 [Access: March 31, 2020]. doi:10.5455/sf.75006


AMA (American Medical Association) Style

Kwaya MY, Yandoka BMS, . Pyrolysis analysis, organic petrology and thermal effects of volcanics on Bima Formation shales, Yola Sub-basin, Northern Benue Trough, Nigeria. JPAS. 2020; 20(1): 71-80. doi:10.5455/sf.75006



Vancouver/ICMJE Style

Kwaya MY, Yandoka BMS, . Pyrolysis analysis, organic petrology and thermal effects of volcanics on Bima Formation shales, Yola Sub-basin, Northern Benue Trough, Nigeria. JPAS. (2020), [cited March 31, 2020]; 20(1): 71-80. doi:10.5455/sf.75006



Harvard Style

Kwaya, M. Y., Yandoka, B. M. S. & (2020) Pyrolysis analysis, organic petrology and thermal effects of volcanics on Bima Formation shales, Yola Sub-basin, Northern Benue Trough, Nigeria. JPAS, 20 (1), 71-80. doi:10.5455/sf.75006



Turabian Style

Kwaya, Mohammed Yerima, Babangida M. Sarki Yandoka, and . 2020. Pyrolysis analysis, organic petrology and thermal effects of volcanics on Bima Formation shales, Yola Sub-basin, Northern Benue Trough, Nigeria. Science Forum (Journal of Pure and Applied Sciences), 20 (1), 71-80. doi:10.5455/sf.75006



Chicago Style

Kwaya, Mohammed Yerima, Babangida M. Sarki Yandoka, and . "Pyrolysis analysis, organic petrology and thermal effects of volcanics on Bima Formation shales, Yola Sub-basin, Northern Benue Trough, Nigeria." Science Forum (Journal of Pure and Applied Sciences) 20 (2020), 71-80. doi:10.5455/sf.75006



MLA (The Modern Language Association) Style

Kwaya, Mohammed Yerima, Babangida M. Sarki Yandoka, and . "Pyrolysis analysis, organic petrology and thermal effects of volcanics on Bima Formation shales, Yola Sub-basin, Northern Benue Trough, Nigeria." Science Forum (Journal of Pure and Applied Sciences) 20.1 (2020), 71-80. Print. doi:10.5455/sf.75006



APA (American Psychological Association) Style

Kwaya, M. Y., Yandoka, B. M. S. & (2020) Pyrolysis analysis, organic petrology and thermal effects of volcanics on Bima Formation shales, Yola Sub-basin, Northern Benue Trough, Nigeria. Science Forum (Journal of Pure and Applied Sciences), 20 (1), 71-80. doi:10.5455/sf.75006