Linear features interpreted over parts of the younger granite complex, North Central Nigeria using HRAM and LANDSAT-ETM data

Nwokocha Kingsley Chiemela, Opara Alexander Iheanyi, Onyekuru Samuel Okechukwu, Okereke Chikwendu Njoku, Emberga Terhemba Theophilus, Ugwuegbu Emmanuel Ikechukwu, Ijeomah Kingsley Chidubem


A detailed structural interpretation of part of the Younger Granite Complex North-central Nigeria was carried out using high resolution aeromagnetic(HRAM) and Landsat-ETM data  to determine the magnetic basement depth, delineate the basement morphology and relief, delineate the structural features associated with the basin and to infer the effects of such structures on the general tectonic history of the study area. Various image and data enhancement and transformation routines were carried out on the aeromagnetic and landsat data to spectrally filter out unwanted signals. Results of the study revealed lineaments with trend directions in the NW-SE, NE-SW, N-S and E-W directions with the NW-SE and NE-SW trends being the dominant trends in the area. Results of the 2-D spectral analysis revealed two layers depth model. The  deeper magnetic source bodies (d2) varies from 0.518km to 8.65km with an average depth of 3.513km while the depth of the shallower magnetic source bodies (d1) ranges from 0.0568km to 0.9885km with an average depth of 0.5118km. The shallower magnetic anomalies are however believed to be as the result of basement rocks which intruded into the sedimentary rocks while the deeper layer may be attributed to intra-basement discontinuities like faults. Structural analysis of these shallow anomalies using 3-D Euler deconvolution with structural index values ranging from 0-3, revealed three main structural models which include spheres, pipes/cylinders, and sills/dikes,There is a strong positive correlation between the two depth estimation methods used in this research. The relationship between lineament densities and Younger granites occurrences in the study area is an indication of tectonic control probably associated with paleo-tectonic structures in the study area acting as conduits for primary mineralization. This correlation is an indication that the emplacement of the Younger granite ring complexes may be associated with epeirogenic uplift.


Lineaments; HRAM; Landsat-ETM; Spectral analysis; Magnetic basement depth; Euler deconvolution; Structural index; Younger granite; Nigeria

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Aina, A. and Olarewaju, V.O., 1992. Geological Interpretation of Aeromagnetic Data in Some Part of Northcentral Nigeria. Journal of African Earth Sciences, 14, 103-109.

Ajakaiye, D.E., 1974. A Gravity Profile across the Banke Ring Complex, Nigeria. Geoexploration, 12, 59-66.

Ajakaiye, D.E., 1989. A Gravity Survey over the Nigerian Younger Granite Province. In: C. A. Kogbe, Ed., Geology of Nigeria, 2nd Edition, Elizabethan Publ. Co., Lagos, 227-244.

Ananaba,S.E and D.E.Ajakaiye., 1987.Evidence of tectonic control of mineralization of Nigeria from lineament density analysis: A Landsat study” Int. Jour. Rem. Sens-ing, vol.1, no.10, pp. 1445-1453.

Akanbi, E.S., Ugodulunwa, F.X.O. and Gyang, B.N., 2012. Mapping Potential Cassiterite Deposits of Naraguta Area, North Central, Nigeria using Geophysics and Geographic Information System (GIS). Journal of Natural Sciences Research. Vol.2, (8),

Bhattacharryya, B.K. and L.K. Leu., 1975. Spectral analysis of gravity and magnetic anomalies due two dimensional structures, Geophysics, Vol. 40, pp. 993-1031.

Blakely, R.J., 1995. Potential theory in gravity and magnetic applications: Cambridge Univ. Press.

Bowden, P, and Kinnaird, J.A., 1984. Geology and mineralization of the Nigerian anorogenic ring complexes. Geologisches Jahrb (Hannover) B56, 3–65

Buser, H., 1966. Paleostructures of Nigeria and adjacent Countries. Geotectonic Res. E. Schweizerbart Sci. Publi., Johannesstr. 3A D-70176 Stuttgart, Germany. Vol. 24,

Chukwu- Ike, I.M., 1997. Interpretation of marginal en- echelon line-aments in the mid-Benue Trough, Nigeri; Nigeria Journal of Mining and Geology,vol. 15, no.1, pp.14 -18, 1997.

Gunn, P. J., 1997. Application of Aeromagnetic Survey to Sedimentary Basin Studies. AGSO Journal of Australian Geology and Geophysics 17, 2, 133-144.

Kangoko, R., Ojo, S.B. and Umego, M.N., 1997. Estimation of Basement depths in the Middle Cross River basin by Spectral analysis of the Aeromagnetic field. Nig. Journ. of Phys. vol. 9, pp.30-36.

Habib, A., Labbassi, K., Akdim, N.,·Tajdi, A. 2013. Contribution des données Alos et Landsat dans la cartographie et l’analyse des linéaments dans le Sahel Central (Maroc occidental), Rev. Française Photogrammétrie Télédétection 203, 33–41.

Hashim, M et al., 2013. Automatic lineament extraction in a heavily vegetated region using Landsat Enhanced Thematic Mapper (ETM+) imagery, Adv. Sp. Res. 51(5), 874–890 [doi:10.1016/j.asr.2012.10.004].

Kogbe, C.A., 1989. The Cretaceous and Paleogene Sediments of Southern Nigeria. Geology of Nigeria 2nd Edition. Rock View (Nig) Ltd, pp. 325-334.

Kogbe, C.A., 1985. Landsat Imagery Interpretation Map of Curve-Linear Structures in North-Central Nigeria. Journal of African Earth Sciences, 3, 269-270.

Liu, X., 2003. On the use of different methods for estimating magnetic depth: The Leading Edge, November, pp. 1090- 1099.

Obaje, N.G., 2009. Geology and Mineral Resources of Nigeria. Springer-Verlag Berlin Heidelberg, P. 219.

Odeyemi, I. B., Y. B. Anifowose and Y. A. Asiwaju-Bello.,1999. Multi-Technique Graphical Analyses of Fractures from Remote Sensing Images of Basement Regions of Nigeria, Journal of Mining and Geology, vol. 35, no. 1, pp.88-105.

Ofoegbu, C.O. and Hein, K., 1991. Analysis of Magnetic Data over Part of the Younger Granite Province of Nigeria.Pure and Applied Geophysics, 136, 173-189

Ofoegbu, C. O., and Onuoha, K. M., (1991). Analysis of magnetic data over the Abakaliki Anticlinorium of the Lower Benue Trough, Nigeria. Marine and Petr.Geol. vol. 8.

O’Leary,D.M., J.D.Friedman, and H.A.Pohn.,1976. Lineament, linear, lineation, some proposed new standards for old terms; Geol. Soc. Am. Bull.,vol. 87,no.2,pp. 1463-1469, 1976.

Oluyide, P.O., 1988. Structural Trends in the Nigerian Basement Complex. Precambrian Geology of Nigeria, Geological Survey of Nigeria, 93-98.

Onyewuchi, R. A., Opara, A. I and Oko, F.U., 2012. Interpretation of Structural and Geomorphic Features from aeromagnetic and Landsat Data: Case Study of Nkalagu Area, Southeastern Nigeria., International Journal of Science and Technology (IJST), vol.2, no.3, pp. 340-350.

Opara, A.I., Ugwu, S.A and Onyewuchi, R. A., 2012. Structural and Tectonic interpretations from landsat 5 Thematic Imagery: case study of Okposi Brine Lake and environs, Lower Benue Trough, Nigeria; Elixir Remote Sensing 49 (2012) 9708-9713.

Opara, A.I., R.A.Onyewuchi, A.O..I..Selemo, S.O.Onyekuru, Ubechu, B.O, T.T.Emberga,D.F.Ibim, and O.P.Nosiri., 2014.Structural and tectonic features of Ugep and Environs, Calabar Flank, South-eastern Nigeria: Evidences from aeromagnetic and Landsat-ETM data Mitteilungen Klosterneuburg,vol. 64, no.7, pp.33-54,2014

Opara, A.I., Udoete, R.L., Nwokocha, K.C., 2015. Structural interpretation of the Jos-Bukuru Younger Granite ring complexes inferred from landsat-TM data. Journal of Geosciences and Geomatics, Vol. 3(3), 56-67.

Reid, B., Allsop, J.M., Granser, H. Millet, A.J., and Somerton., I. W., (1990). Magnetic interpretation in three dimensions using Euler deconvolution., Geophysics. Vol. 55, No. I; P. 80-91.

Salem, A., Ushijima, K., Elsirafi, A. and Mizunaga, H., 2000. Spectral analysis of aeromagnetic data for Geothermal reconnaissance of Uaseir area, Northern Red Sea, Egypt. Proceedings of World Geothermal Congress, Kyushu-Tohokie, Japan, 28: 10.

Samaila, C. A and Solomon, N. Y., 2011. Groundwater Potential on the Jos-Bukuru Plateau, North Central Nigeria, using lineaments from gravity measurements; Journal of Water Resource and Protection, vol. 3; pp. 628-633.

Spector, A. and Grant, F.S., 1970. Statistical models for interpreting aeromagnetic data. Geophysics, Vol.35, pp.293-302.

Thompson, D. T.,1982. EULDPH: A new technique for making computer-assisted depth estimates from magnetic data, Geophysics, 47, 31-37.

Turner, D.C., 1972. Structural and Tectonic Setting of the Younger Granite Ring Complexes of Nigeria and Southern Niger. Part I: Ring Complexes and Their Component Units. Savana I, 223-236.

Turner, D. C.1989. Structure and Petrology of the Younger Granite Ring Complexes,” In: C.A Ogbe, Ed., Geology of Nigeria, Rock View International, France, 1989, pp. 175-190.

Udoh, A. N., 1988. Remote sensing imageries of Nigeria, North of 70401N, P.O. Oluyide, et. al., eds., Precambrian Geology, Geological Survey of Nigeria, Publ.,pp.99- 102.

Whitehead, N. and Musselman, C., 2008. Montaj Gravity/Magnetic Interpretation: Processing, Analysis and Visualization System for 3D Inversion of Potential Field Data for Oasis montaj v6.3, Geosoft Incorporated, 85 Richmond St. W., Toronto, Ontario, M5H 2C9, Canada.

Wright, J.B., 1989. Volcanic Rocks in Nigeria. In: C. A. Kogbe, Ed., Geology of Nigeria, 2nd Edition, Elizabethan Publ. Co., Lagos, 125-173.


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