Field Observations and Geophysical Research Applied to the Detection of Manganese (Mn) Deposits in the Eastern Part of Oban Massif, South-Eastern Nigeria: An Integrated Approach
The growing need for an industrialized world, especially in Africa, cannot be feasible without adequate mineral resources. Thus, the search for more mineral deposits will continue to be necessary. An integrated approach involving geological mapping and a high-resolution geophysical (aeromagnetic) in...
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MDPI AG
2022-09-01
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| Series: | Minerals |
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| author | Emmanuel E. Okon Ebenezer A. Kudamnya Kehinde D. Oyeyemi Benjamin O. Omang Omotayo Ojo Mohamed Metwaly |
| author_facet | Emmanuel E. Okon Ebenezer A. Kudamnya Kehinde D. Oyeyemi Benjamin O. Omang Omotayo Ojo Mohamed Metwaly |
| author_sort | Emmanuel E. Okon |
| collection | DOAJ |
| description | The growing need for an industrialized world, especially in Africa, cannot be feasible without adequate mineral resources. Thus, the search for more mineral deposits will continue to be necessary. An integrated approach involving geological mapping and a high-resolution geophysical (aeromagnetic) investigation was conducted to assess the manganese mineralization in parts of the Oban Massif, southeast Nigeria. The aeromagnetic data were processed using regional-residual anomaly separation techniques, first vertical derivative (1VD), analytical signals, source parameters imaging (SPI), and Euler deconvolution to better understand magnetic source distributions and their depths of occurrence. The geological investigation revealed a dominant variety of metamorphic rock types, including migmatitic (banded) gneisses hornblende granite gneisses, amphibolites, charnockites, and some quartzite ridges. Also present are some indications of pockets of dolerites. The study area also observed epithermal Mn+Fe+Qtz vein type mineralization associated with hydrothermal alteration zones whose orientation coincides with dominant structural orientation from aeromagnetic interpretation. Analysis of aeromagnetic data shows that the study area is dominated by ENE, NNE, and E-W structural directions (near-surface basement structures), with the ENE trends related to mineralization in the area. The manganese mineralization within Oban Massif is structurally controlled. The depths of the magnetic anomalies in the study area were estimated using SPI and Euler decomposition algorithms. SPI delineated the shallow, intermediate, and deep magnetic anomalies at 84–142 m, 152–200 m, and 215–656 m, respectively. Euler decomposition, however, revealed that shallow, intermediate, and deep depths occurrence of the magnetic anomalies are at 200–377 m, 393–472 m, and 499–793 m, respectively. |
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| last_indexed | 2024-03-09T19:44:44Z |
| publishDate | 2022-09-01 |
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| series | Minerals |
| spelling | doaj.art-bf26b2ce882e4299b0e3cb614fc94b1b2023-11-24T01:29:26ZengMDPI AGMinerals2075-163X2022-09-011210125010.3390/min12101250Field Observations and Geophysical Research Applied to the Detection of Manganese (Mn) Deposits in the Eastern Part of Oban Massif, South-Eastern Nigeria: An Integrated ApproachEmmanuel E. Okon0Ebenezer A. Kudamnya1Kehinde D. Oyeyemi2Benjamin O. Omang3Omotayo Ojo4Mohamed Metwaly5Geo-Resources Research Group, Geology Department, University of Calabar, Calabar 540271, NigeriaGeo-Resources Research Group, Geology Department, University of Calabar, Calabar 540271, NigeriaApplied Geophysics Unit, Department of Physics, Covenant University, Ota 11001, NigeriaGeo-Resources Research Group, Geology Department, University of Calabar, Calabar 540271, NigeriaDepartment of Geoscience, University of Calgary, Calgary, AB T2N 1N4, CanadaDepartment of Archaeology, College of Tourism and Archaeology, King Saud University, Riyadh 12372, Saudi ArabiaThe growing need for an industrialized world, especially in Africa, cannot be feasible without adequate mineral resources. Thus, the search for more mineral deposits will continue to be necessary. An integrated approach involving geological mapping and a high-resolution geophysical (aeromagnetic) investigation was conducted to assess the manganese mineralization in parts of the Oban Massif, southeast Nigeria. The aeromagnetic data were processed using regional-residual anomaly separation techniques, first vertical derivative (1VD), analytical signals, source parameters imaging (SPI), and Euler deconvolution to better understand magnetic source distributions and their depths of occurrence. The geological investigation revealed a dominant variety of metamorphic rock types, including migmatitic (banded) gneisses hornblende granite gneisses, amphibolites, charnockites, and some quartzite ridges. Also present are some indications of pockets of dolerites. The study area also observed epithermal Mn+Fe+Qtz vein type mineralization associated with hydrothermal alteration zones whose orientation coincides with dominant structural orientation from aeromagnetic interpretation. Analysis of aeromagnetic data shows that the study area is dominated by ENE, NNE, and E-W structural directions (near-surface basement structures), with the ENE trends related to mineralization in the area. The manganese mineralization within Oban Massif is structurally controlled. The depths of the magnetic anomalies in the study area were estimated using SPI and Euler decomposition algorithms. SPI delineated the shallow, intermediate, and deep magnetic anomalies at 84–142 m, 152–200 m, and 215–656 m, respectively. Euler decomposition, however, revealed that shallow, intermediate, and deep depths occurrence of the magnetic anomalies are at 200–377 m, 393–472 m, and 499–793 m, respectively.https://www.mdpi.com/2075-163X/12/10/1250aeromagneticmanganeseOban Massifhydrothermal alteration |
| spellingShingle | Emmanuel E. Okon Ebenezer A. Kudamnya Kehinde D. Oyeyemi Benjamin O. Omang Omotayo Ojo Mohamed Metwaly Field Observations and Geophysical Research Applied to the Detection of Manganese (Mn) Deposits in the Eastern Part of Oban Massif, South-Eastern Nigeria: An Integrated Approach Minerals aeromagnetic manganese Oban Massif hydrothermal alteration |
| title | Field Observations and Geophysical Research Applied to the Detection of Manganese (Mn) Deposits in the Eastern Part of Oban Massif, South-Eastern Nigeria: An Integrated Approach |
| title_full | Field Observations and Geophysical Research Applied to the Detection of Manganese (Mn) Deposits in the Eastern Part of Oban Massif, South-Eastern Nigeria: An Integrated Approach |
| title_fullStr | Field Observations and Geophysical Research Applied to the Detection of Manganese (Mn) Deposits in the Eastern Part of Oban Massif, South-Eastern Nigeria: An Integrated Approach |
| title_full_unstemmed | Field Observations and Geophysical Research Applied to the Detection of Manganese (Mn) Deposits in the Eastern Part of Oban Massif, South-Eastern Nigeria: An Integrated Approach |
| title_short | Field Observations and Geophysical Research Applied to the Detection of Manganese (Mn) Deposits in the Eastern Part of Oban Massif, South-Eastern Nigeria: An Integrated Approach |
| title_sort | field observations and geophysical research applied to the detection of manganese mn deposits in the eastern part of oban massif south eastern nigeria an integrated approach |
| topic | aeromagnetic manganese Oban Massif hydrothermal alteration |
| url | https://www.mdpi.com/2075-163X/12/10/1250 |
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