Multi-Step Filtering of High Resolution Aeromagnetic Data for Geological Delineation over Sokoto Basin, Northern Nigeria
DOI:
https://doi.org/10.56919/usci.2542.013Keywords:
Multi-Step Filter, Magnetic field intensity, Sokoto BasinAbstract
The aeromagnetic survey provides a means for prospecting subsurface structures based on the magnetic susceptibility contrast of the underlying materials. It is applied in hydrocarbon study, mineral exploration, environmental monitoring, unexploded ordinance, and geological mapping. In this research, high-resolution airborne magnetic data over Sokoto Basin were acquired, analysed, and interpreted using some selected filters applied in steps to delineate the geologic boundary of the study area. The data, which were acquired in the form of 0.5⁰ × 0.5⁰ square grids, were first knitted to form the composite total magnetic field intensity map of the study area. A hierarchical combination of four carefully selected enhancement filters was then applied to the composite total magnetic field intensity map to enhance regional features. The filters were reduction to the equator, Butterworth, vertical integration, and upward continuation – the algorithms are available in the Oasis Montaj environment. The results obtained showed four distinct regional fields – very high (>100 nT) at the northern part corresponding to the Sokoto Group, high (60-100 nT) at the north-western part corresponding to the Gwandu Formation, moderate (40-50 nT) at the mid part indicting the Rima Group and low (< 40 nT) in the south-eastern part of the area resulting from Continental Intercalaire. It is concluded that the multi-step filter has reasonably delineated the stratigraphic successions in the Nigerian sector of the lullummeden Basin (Sokoto Basin). The filtering was efficacious in resolving the geologic structures, which were not resolved when a single technique was applied in isolation.
References
Anudu, G. K., Stephen, R. A. and Macdonald, D. I. M. (2014). Using High-Resolution Aeromagnetic Data to Recognise and Map Intra-Sedimentary Volcanic Rocks and Geological Structures across the Cretaceous Middle Benue Trough, Nigeria. Journal of African Earth Science, 99, 625-636. https://doi.org/10.1016/j.jafrearsci.2014.02.017 DOI: https://doi.org/10.1016/j.jafrearsci.2014.02.017
Ezekiel, K. Benjamin, O. O. Simon, K. Ayodele, O. O. Ahmad, N. (2019). Determination of Hydrocarbon Potentials Using High Resolution Aeromagnetic Data over Sokoto Basin Northwestern Nigeria, International Journal of Geosciences, 10, 419-438. https://doi.org/10.4236/ijg.2019.104024 DOI: https://doi.org/10.4236/ijg.2019.104024
GETECH Group (2007). Processing and Interpretation of Gravity and Magnetic Data. Advanced Processing and Interpretation, GETECH Group Plc. Pp 27.
Ibe S. O., Uche Iduma. (2018). Structural Interpretation of Northern Sokoto Basin, Using Airborne Magnetic Data, International Journal of Innovative Research in Science, Engineering and Technology, 6, 112-119.
Kamba, A. H., Muhammad, S. and Illo, A. G. (2018). Basement Depth Estimates of some part of Lower Sokoto Sedimentary Basin, North-western Nigeria, Using Spectral Depth Analysis, International Journal of Marine, Atmospheric & Earth Sciences, 6(1), 1-9.
Lawal, S, Salako, K. A. and Bonde, D. S. (2020). Delineation of Mineral Potential Zones over Lower Sokoto Basin, Northwestern Nigeria using Aeromagnetic Data. Academic Research International, 11(2), 9-29.
Obaje, N., Wehner, H., Scheeder, G., Abubakar, M. and Jauro, A. (2004). Hydrocarbon Prospectivity of Nigeria's Inland Basins: from the Viewpoint of Organic Geochemistry and Organic Petrology. AAPG Bulletin, 88(3), 325-353. https://doi.org/10.1306/10210303022 DOI: https://doi.org/10.1306/10210303022
Obaje, N. G. (2009). Geology and Mineral Resources of Nigeria. Springer, Heildelberg, pp 221. https://doi.org/10.1007/978-3-540-92685-6 DOI: https://doi.org/10.1007/978-3-540-92685-6_11
Obaje, N. G., Aduku, M. and and Yusuf, I. (2013). The Sokoto Basin of Nigeria: A Preliminary Assessment of the Hydrocarbon Prospectivity. Petroleum Technology Development Journal (ISSN 1595-9104), 3(2), 66-80.
Ozumba, M. B. (2018). Potential Reservoir Rock Characteristics Of The Sokoto Sector of Illemmeden Basin: Geological Similarities with the Niger Delta Petroleum Province And Prospects For Hygrocarbon Discovery. Arch Pet Environ Biotechnol, 132, 2574-7614.
Rabo, Y., Bello, A. and Abubakar, I. (2022a). Estimation of Basement Depth of Eastern Part of Sokoto Sedimentary Basin, Northwestern Nigeria. Science Journal of Advanced and Cognitive Research, 2(1), 22-32.
Rabo, Y., Bonde, D. S., Bello, A. and Usman, A. (2022b). Geophysical Investigation for Mineral Prospecting of Some Parts of Eastern Sokoto Sedimentary Basin, Nigeria. Saudi Journal of Engineering Technology, 2(1), 22-32.
Sheu, A. T., Udensi, E. E. Adeniyi, J. O. and Jonah, S. A. (2004). Spectral Analysis of the Magnetic Residual Anomalies over the Upper Sokoto Basin, Nigeria. Zuma Journal of Pure and Applied Science, 6, 213-219.
Shehu, A. T., 2Nwankwo, L. I. and 3Salako, K. A. (2017). The Source Parameter Imaging (SPI) method for estimation of depth to buried magnetic sources from gridded digital data of the Sokoto Basin, Nigeria: Implications in exploration Geophysics. Zimbabwe Journal of Science & Technology pp 66–74.
Telford, W. M., Geldart, L. P., and Sheriff, R. E. (2004). Applied Geophysics. 2nd ed. Cambridge University Press, Pitt Building, Trumpington Street, Cambridge CB2 IRP.
Downloads
Published
Issue
Section
License
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
UMYU Scientifica recognizes the importance of protecting authors’ intellectual property while promoting the free exchange of scientific knowledge. The journal adopts a copyright-retention model that empowers authors to maintain ownership of their work while granting the journal rights necessary for publication and dissemination.
1. Copyright Ownership
Authors publishing with UMYU Scientifica retain full copyright and publishing rights to their work. By submitting a manuscript, authors agree to grant the journal a non-exclusive license to publish, reproduce, distribute, and archive the article in all forms and media for the purpose of scholarly communication.
2. Licensing Terms
All articles are published under the Creative Commons Attribution–NonCommercial (CC BY-NC) license.
This license permits others to:
- Share - copy and redistribute the material in any medium or format.
- Adapt - remix, transform, and build upon the material.
- For non-commercial purposes only, provided that proper credit is given to the original author(s) and UMYU Scientifica as the source, a link to the license is provided, and any modifications are clearly indicated.
Commercial reuse or distribution of the content requires written permission from both the author and the editorial office.
3. Author Rights
Authors are free to:
- Deposit all versions of their manuscript (preprint, accepted version, and published version) in institutional, disciplinary, or public repositories without embargo.
- Use and distribute their published article for non-commercial scholarly purposes, including teaching, conference presentations, and research sharing.
- Include their work in future books, theses, or compilations, provided proper citation to the journal is made.
4. Publisher’s Rights
Upon publication, UMYU Scientifica retains the right to:
- Host, index, and disseminate the article through the journal’s website and partner databases.
- Archive the content in long-term preservation systems such as the PKP Preservation Network (PKP-PN) and the Umaru Musa Yar’adua University Institutional Repository.
5. Attribution and Citation
Users must give appropriate credit to the author(s), include a link to the article’s DOI or the journal webpage, and indicate if changes were made. Proper citation is required whenever the work is reused or referenced.
6. License Reference
For detailed terms of use, please refer to the Creative Commons Attribution–NonCommercial 4.0 International License (CC BY-NC 4.0):
https://creativecommons.org/licenses/by-nc/4.0/
