Paleo-productivity and petroleum source evaluation of the Nkporo and Awgu shales, Lower Benue Trough, Nigeria: Insight from inorganic geochemistry
The petroleum paleo-productivity and generative potential of the Nkporo and Awgu shales in the Lower Benue Trough (LBT) were studied. Major oxides were determined using Spectro Ciros Inductively-coupled plasma optical emission spectrometer (ICP-OES) while trace and rare earth elements were determine...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2023-07-01
|
| Series: | Energy Geoscience |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666759223000070 |
| _version_ | 1797798597099520000 |
|---|---|
| author | Henry Yemagu Madukwe Adebanji Kayode Adegoke Mutiu Adesina Adeleye Adeyinka Oluyemi Aturamu |
| author_facet | Henry Yemagu Madukwe Adebanji Kayode Adegoke Mutiu Adesina Adeleye Adeyinka Oluyemi Aturamu |
| author_sort | Henry Yemagu Madukwe |
| collection | DOAJ |
| description | The petroleum paleo-productivity and generative potential of the Nkporo and Awgu shales in the Lower Benue Trough (LBT) were studied. Major oxides were determined using Spectro Ciros Inductively-coupled plasma optical emission spectrometer (ICP-OES) while trace and rare earth elements were determined using an ELAN 9000 Inductively-coupled plasma mass spectrometer (ICP-MS). The shales have Co/Ni ratios greater than 0.1 suggesting oil source rocks with more marine source input due to brief marine incursion in the transition zone after deposition. The very low Ni values and moderate V values, and a lack of correlation between the TOC and sulphur content, suggests that the organic matter is of terrestrial Type Ⅲ; and the very low paleo-productivity (Ba/Al and P/Ti ratios) suggests that the organic matter is of terrestrial origin. The low V/Ni values of the Nkporo and Awgu shales (Av. ≈ 4) and the high metal concentrations indicate a matured status. From the K/Rb ratios of the Nkporo (191–259) and Awgu shales (198–261), it can be deduced that the organic matter within the shales experienced a considerable loss of K and the shales are mature to generate gaseous hydrocarbons. |
| first_indexed | 2024-03-13T04:06:13Z |
| format | Article |
| id | doaj.art-564aa05cb7134c279d1a7e3c9f3b708b |
| institution | Directory Open Access Journal |
| issn | 2666-7592 |
| language | English |
| last_indexed | 2024-03-13T04:06:13Z |
| publishDate | 2023-07-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Energy Geoscience |
| spelling | doaj.art-564aa05cb7134c279d1a7e3c9f3b708b2023-06-21T07:00:57ZengKeAi Communications Co., Ltd.Energy Geoscience2666-75922023-07-0143100161Paleo-productivity and petroleum source evaluation of the Nkporo and Awgu shales, Lower Benue Trough, Nigeria: Insight from inorganic geochemistryHenry Yemagu Madukwe0Adebanji Kayode Adegoke1Mutiu Adesina Adeleye2Adeyinka Oluyemi Aturamu3Department of Geology, Faculty of Science, Ekiti State University, P.M.B. 5363, Ado-Ekiti, Nigeria; Corresponding author.Department of Geology, University of Malaya, 50603, Kuala Lumpur, MalaysiaDepartment of Geology, Faculty of Science, University of Ibadan, Ibadan, NigeriaDepartment of Geology, Faculty of Science, Ekiti State University, P.M.B. 5363, Ado-Ekiti, NigeriaThe petroleum paleo-productivity and generative potential of the Nkporo and Awgu shales in the Lower Benue Trough (LBT) were studied. Major oxides were determined using Spectro Ciros Inductively-coupled plasma optical emission spectrometer (ICP-OES) while trace and rare earth elements were determined using an ELAN 9000 Inductively-coupled plasma mass spectrometer (ICP-MS). The shales have Co/Ni ratios greater than 0.1 suggesting oil source rocks with more marine source input due to brief marine incursion in the transition zone after deposition. The very low Ni values and moderate V values, and a lack of correlation between the TOC and sulphur content, suggests that the organic matter is of terrestrial Type Ⅲ; and the very low paleo-productivity (Ba/Al and P/Ti ratios) suggests that the organic matter is of terrestrial origin. The low V/Ni values of the Nkporo and Awgu shales (Av. ≈ 4) and the high metal concentrations indicate a matured status. From the K/Rb ratios of the Nkporo (191–259) and Awgu shales (198–261), it can be deduced that the organic matter within the shales experienced a considerable loss of K and the shales are mature to generate gaseous hydrocarbons.http://www.sciencedirect.com/science/article/pii/S2666759223000070MaturityOrganic matterPaleo-productivityPetroleum potentialsShale |
| spellingShingle | Henry Yemagu Madukwe Adebanji Kayode Adegoke Mutiu Adesina Adeleye Adeyinka Oluyemi Aturamu Paleo-productivity and petroleum source evaluation of the Nkporo and Awgu shales, Lower Benue Trough, Nigeria: Insight from inorganic geochemistry Energy Geoscience Maturity Organic matter Paleo-productivity Petroleum potentials Shale |
| title | Paleo-productivity and petroleum source evaluation of the Nkporo and Awgu shales, Lower Benue Trough, Nigeria: Insight from inorganic geochemistry |
| title_full | Paleo-productivity and petroleum source evaluation of the Nkporo and Awgu shales, Lower Benue Trough, Nigeria: Insight from inorganic geochemistry |
| title_fullStr | Paleo-productivity and petroleum source evaluation of the Nkporo and Awgu shales, Lower Benue Trough, Nigeria: Insight from inorganic geochemistry |
| title_full_unstemmed | Paleo-productivity and petroleum source evaluation of the Nkporo and Awgu shales, Lower Benue Trough, Nigeria: Insight from inorganic geochemistry |
| title_short | Paleo-productivity and petroleum source evaluation of the Nkporo and Awgu shales, Lower Benue Trough, Nigeria: Insight from inorganic geochemistry |
| title_sort | paleo productivity and petroleum source evaluation of the nkporo and awgu shales lower benue trough nigeria insight from inorganic geochemistry |
| topic | Maturity Organic matter Paleo-productivity Petroleum potentials Shale |
| url | http://www.sciencedirect.com/science/article/pii/S2666759223000070 |
| work_keys_str_mv | AT henryyemagumadukwe paleoproductivityandpetroleumsourceevaluationofthenkporoandawgushaleslowerbenuetroughnigeriainsightfrominorganicgeochemistry AT adebanjikayodeadegoke paleoproductivityandpetroleumsourceevaluationofthenkporoandawgushaleslowerbenuetroughnigeriainsightfrominorganicgeochemistry AT mutiuadesinaadeleye paleoproductivityandpetroleumsourceevaluationofthenkporoandawgushaleslowerbenuetroughnigeriainsightfrominorganicgeochemistry AT adeyinkaoluyemiaturamu paleoproductivityandpetroleumsourceevaluationofthenkporoandawgushaleslowerbenuetroughnigeriainsightfrominorganicgeochemistry |