Interpretation of Aeromagnetic Data of Part of Gwagwalada Abuja Nigeria for Potential Mineral Targets

Authors

  • Priscillia Egbelehulu Department of Physics, University of Abuja, Abuja, Nigeria
  • Abu Mallam Department of Physics, University of Abuja, Abuja, Nigeria
  • Abel. U. Osagie Department of Physics, University of Abuja, Abuja, Nigeria

DOI:

https://doi.org/10.30564/jgr.v3i4.3581

Abstract

This study analyzes aeromagnetic data over a section of Gwagwalada in Abuja. The data were obtained from the Nigerian Geological Survey Agency acquired at 100 m terrain clearance. The study area spans longitudes 7.0875 E to 7.1458 E and latitude 8.9625 N to 9.0 N (about 27 km2). The dataset was reduced to the equator (RTE) and downward continued by 50 m. Analytic signal filter was applied on TMI-RTE grid to detect the edges of the magnetic bodies present. The structure was observed to trend NE-SW. The CET lineament map reveals intersections such as junctions and corners on the map. This revealed structure liable for potential mineralization zone. Euler deconvolution technique applied over the transformed dataset ascertain the location and depth of the structure,having a maximum depth of about 421 m and a minimum of about 59 m.Variation in magnetic depth and susceptibility contrast is specified by the gridded SPI depth map.

Keywords:

Aeromagnetic; Lineament; Faults; Total magnetic intensity

References

[1] Elkhateeb, O.S. Delineation Potential Gold Mineralization Zone in A Part of Central Eastern Desert,Egypt Using Airborn Magnetic and Radiometric data [J]. NRIAG Journal of Astronomy and Geophysics (2018). 55-70.

[2] Finlay C.C, Maus S, Beggan C.D, Bondar T.N,Chambodut A, Chernova T.A, Chulliat A, Golovkov V.P, Hamilton B, Hamoudi M, Holme R. International geomagnetic reference field: the eleventh generation [J]. Geophysical Journal International (2010).183(3):1216-30.

[3] Hinze W.J. The role of gravity and magnetic methods in engineering and environmental studies. InGeotechnical an Environmental Geophysics: Volume I:Review and Tutorial [J]. Society of Exploration Geophysicists (1990). 75-126.

[4] Kearey, P, Brooks, M., & Ian, H. An Introduction to Geophyscial Exploration. Third Edition Blackwell Publishing (2002).

[5] Mushayandebvu M.F, Lesur V, Reid A.B, Fairhead J.D. Grid Euler deconvolution with constraints for 2D structures [J]. Geophysics (2004). 69(2):489-96.

[6] Nabighian, M. N. The analytic signal of two-dimensional magnetic bodies with polygonal cross-section- Its properties and use for automated anomaly interpretation [J]. Geophysics (1972), 37, 507-517.

[7] Nabighian, M. N. Additional comments on the analytic signal of two-dimensional magnetic bodies with polygonal cross-section [J] Geophysics (1974), 39,85-92.

[8] Offodile, M. E. The development and management of groundwater in Nigeria. Contributions of Geosciences and Mining to National Development, (NMGS) (2003), 1-7.

[9] Reid, A.B., Allsop, J.M., Granser, H., Millett, A.J.,Somerton, I.W. Magnetic Interpretation in Three Dimension Using Euler Deconvolution [J]. Geophysics (1990), 55, 80-90.

[10] Reynolds, R.L., Rosenbaum, J.G., Hudson, M.R and Fishman, N.S Rock Magnetism, the istribution of Magnetic Minerals in Earth Crust and Aeromagnetic Anomalies. U.S Geological Survey Bulletin (1990).24-45.

[11] Robert, J.H. Application of Magnetic and Electro magnetic Methods to Locate Buried Metal. U.S Department of Interior, U.S Geological Survey, Open File Report (2003). 03-317.

[12] Roest, W.R., Verhoef, J., and Pilkington, M. Magnet ic interpretation using the 3-D analytic signal. Geophysics (1992), 57, 116-125.

[13] Scott, W.J Geophysics for Mineral Exploration-A Manual for Prospectors (2014). 1-2, 11-14.

[14] Smith, R.S., Thurston, J.B., Dai, Ting-Fan, and Ma cLeod, I.N. SPI™ - the improved source parameter imaging method: Geophysical Prospecting (1998),46, 141-151.

[15] Stavrev, P. and Reid, A. Degrees of Homogeneity of Potential Fields and Structural Indices of Euler De convolution [J]. Geophysics (2007), 72, 1-12.

[16] Thompson, D.T. A New Technique of Making Computer Assisted Depth Estimates from Magnetic Data [J]. Geophysics (1982), 47: 31-37.

[17] Thurston, J. B., Smith, R. S. and Guillon, J-C. A mul timodel method for depth estimation from magnetic data [J]. Geophysics (2002), 67, 555-561.

[18] Thurston, J., Guillon, J. -C. and Smith, R. Model-in dependent depth estimation with the SPI™ method:SEG Expanded Abstracts (1999), 18,403-406.

[19] Thurston, J.B., and Smith, R.S. Automatic conversion of magnetic data to depth, dip, and susceptibility contrast using the SPI™ method: Geophysics (1997),62, 807-813.

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How to Cite

Egbelehulu, P., Mallam, A., & Osagie, A. U. (2021). Interpretation of Aeromagnetic Data of Part of Gwagwalada Abuja Nigeria for Potential Mineral Targets. Journal of Geological Research, 3(4), 30–35. https://doi.org/10.30564/jgr.v3i4.3581

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