Delineation of structural lineaments of Southeast Nigeria using high resolution aeromagnetic data
Structural lineaments of Southeast Nigeria were delineated using high-resolution aeromagnetic data. Advanced methods such as enhanced horizontal gradient amplitude (EHGA) involving a 3D model and tilt depth method (TDM) were used in this study. The simulated magnetic model involving the EHGA detecto...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2022-04-01
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| Series: | Open Geosciences |
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| Online Access: | https://doi.org/10.1515/geo-2022-0360 |
| _version_ | 1811236588996263936 |
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| author | Eldosouky Ahmed M. Ekwok Stephen E. Akpan Anthony E. Achadu Ogiji-Idaga M. Pham Luan Thanh Abdelrahman Kamal Gómez-Ortiz David Alarifi Saad S. |
| author_facet | Eldosouky Ahmed M. Ekwok Stephen E. Akpan Anthony E. Achadu Ogiji-Idaga M. Pham Luan Thanh Abdelrahman Kamal Gómez-Ortiz David Alarifi Saad S. |
| author_sort | Eldosouky Ahmed M. |
| collection | DOAJ |
| description | Structural lineaments of Southeast Nigeria were delineated using high-resolution aeromagnetic data. Advanced methods such as enhanced horizontal gradient amplitude (EHGA) involving a 3D model and tilt depth method (TDM) were used in this study. The simulated magnetic model involving the EHGA detector positioned peaks over source borders and created sharp and clear edges for magnetic sources. The TDM is a cutting-edge depth determination method revealing the depth of the contacts and thickness of sedimentary bodies that vary from ∼500 to ∼2,500 m and ∼3,000 to ∼5,000 m, respectively. Lineaments of the study area were extracted from the EHGA map. The structural map showed the dominance of short-ranged (∼0.29 to ∼1.48 km) linear magnetic anomalies. In addition, regional geologic structures (∼2.8 to ∼24.5 km) occur at the western flank of the study area. In general, these structures trend in the NE–SW, NNE–SSW, N–S, E–W, and NW–SE directions. They are indicators of subsurface faults, contacts, and tectonic structures of the thermo-tectonic events associated with Santonian Abakaliki Anticlinorium, Tertiary-Recent Ikom-Mamfe Rift, and structural deformations of the basement rocks associated with the Oban Massif. |
| first_indexed | 2024-04-12T12:10:29Z |
| format | Article |
| id | doaj.art-a8609cb0177f497cbfbb075632b0cce4 |
| institution | Directory Open Access Journal |
| issn | 2391-5447 |
| language | English |
| last_indexed | 2024-04-12T12:10:29Z |
| publishDate | 2022-04-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Open Geosciences |
| spelling | doaj.art-a8609cb0177f497cbfbb075632b0cce42022-12-22T03:33:35ZengDe GruyterOpen Geosciences2391-54472022-04-0114133134010.1515/geo-2022-0360Delineation of structural lineaments of Southeast Nigeria using high resolution aeromagnetic dataEldosouky Ahmed M.0Ekwok Stephen E.1Akpan Anthony E.2Achadu Ogiji-Idaga M.3Pham Luan Thanh4Abdelrahman Kamal5Gómez-Ortiz David6Alarifi Saad S.7Geology Department, Faculty of Science, Suez University, Suez, 43518, EgyptDepartment of Physics, University of Calabar, PMB 1115, Calabar, Cross River State, NigeriaDepartment of Physics, University of Calabar, PMB 1115, Calabar, Cross River State, NigeriaDepartment of Geology, University of Calabar, PMB 1115, Calabar, Cross River State, NigeriaDepartment of Geophysics, Faculty of Physics, University of Science, Vietnam National University, Hanoi, VietnamDepartment of Geology & Geophysics, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi ArabiaDepartment of Biology and Geology, Physics and Inorganic Chemistry, ESCET, Universidad Rey Juan Carlos, Móstoles, Madrid, SpainDepartment of Geology & Geophysics, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi ArabiaStructural lineaments of Southeast Nigeria were delineated using high-resolution aeromagnetic data. Advanced methods such as enhanced horizontal gradient amplitude (EHGA) involving a 3D model and tilt depth method (TDM) were used in this study. The simulated magnetic model involving the EHGA detector positioned peaks over source borders and created sharp and clear edges for magnetic sources. The TDM is a cutting-edge depth determination method revealing the depth of the contacts and thickness of sedimentary bodies that vary from ∼500 to ∼2,500 m and ∼3,000 to ∼5,000 m, respectively. Lineaments of the study area were extracted from the EHGA map. The structural map showed the dominance of short-ranged (∼0.29 to ∼1.48 km) linear magnetic anomalies. In addition, regional geologic structures (∼2.8 to ∼24.5 km) occur at the western flank of the study area. In general, these structures trend in the NE–SW, NNE–SSW, N–S, E–W, and NW–SE directions. They are indicators of subsurface faults, contacts, and tectonic structures of the thermo-tectonic events associated with Santonian Abakaliki Anticlinorium, Tertiary-Recent Ikom-Mamfe Rift, and structural deformations of the basement rocks associated with the Oban Massif.https://doi.org/10.1515/geo-2022-0360aeromagneticehgatilt depthbasement structuresnigeria |
| spellingShingle | Eldosouky Ahmed M. Ekwok Stephen E. Akpan Anthony E. Achadu Ogiji-Idaga M. Pham Luan Thanh Abdelrahman Kamal Gómez-Ortiz David Alarifi Saad S. Delineation of structural lineaments of Southeast Nigeria using high resolution aeromagnetic data Open Geosciences aeromagnetic ehga tilt depth basement structures nigeria |
| title | Delineation of structural lineaments of Southeast Nigeria using high resolution aeromagnetic data |
| title_full | Delineation of structural lineaments of Southeast Nigeria using high resolution aeromagnetic data |
| title_fullStr | Delineation of structural lineaments of Southeast Nigeria using high resolution aeromagnetic data |
| title_full_unstemmed | Delineation of structural lineaments of Southeast Nigeria using high resolution aeromagnetic data |
| title_short | Delineation of structural lineaments of Southeast Nigeria using high resolution aeromagnetic data |
| title_sort | delineation of structural lineaments of southeast nigeria using high resolution aeromagnetic data |
| topic | aeromagnetic ehga tilt depth basement structures nigeria |
| url | https://doi.org/10.1515/geo-2022-0360 |
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