Combination of Tilt-Angle and Euler Deconvolution Approaches to Determine Structural Features from Aeromagnetic Data Modeling over Akonolinga-Loum Area (Centre-East, Cameroon) — Oak Academic Publishing
Research ArticleOpen AccessGoogle Scholar indexed
Combination of Tilt-Angle and Euler Deconvolution Approaches to Determine Structural Features from Aeromagnetic Data Modeling over Akonolinga-Loum Area (Centre-East, Cameroon)
Postgraduate School of Sciences, Technologies & Geosciences, University of Yaoundé I, Yaoundé, Cameroon
,
Postgraduate School of Sciences, Technologies & Geosciences, University of Yaoundé I, Yaoundé, Cameroon
,
Department of Applied Geophysics, Geology and Mining Exploitation College, University of Ngaoundéré, Ngaoundéré, Cameroun
,
Department of Earth Sciences, Faculty of Science, University of Maroua, Maroua, Cameroon
,
Department of Physics, Advanced Teacher’s Training College, University of Yaoundé I, Yaoundé, Cameroon
,
Department of Physics, Faculty of Science, University of Bamenda, Bambili, Cameroon
,
Postgraduate School of Sciences, Technologies & Geosciences, University of Yaoundé I, Yaoundé, Cameroon
,
Postgraduate School of Sciences, Technologies & Geosciences, University of Yaoundé I, Yaoundé, Cameroon
1 Postgraduate School of Sciences, Technologies & Geosciences, University of Yaoundé I, Yaoundé, Cameroon
2 Postgraduate School of Sciences, Technologies & Geosciences, University of Yaoundé I, Yaoundé, Cameroon
3 Department of Applied Geophysics, Geology and Mining Exploitation College, University of Ngaoundéré, Ngaoundéré, Cameroun
4 Department of Earth Sciences, Faculty of Science, University of Maroua, Maroua, Cameroon
5 Department of Physics, Advanced Teacher’s Training College, University of Yaoundé I, Yaoundé, Cameroon
6 Department of Physics, Faculty of Science, University of Bamenda, Bambili, Cameroon
7 Postgraduate School of Sciences, Technologies & Geosciences, University of Yaoundé I, Yaoundé, Cameroon
8 Postgraduate School of Sciences, Technologies & Geosciences, University of Yaoundé I, Yaoundé, Cameroon
Aeromagnetic data for center-east Cameroon between the latitudes 3.5 ° to 4.5 ° N and longitudes 12 ° to 12.5 ° E are used to further study the subsurface area of this part of the geological Province of Central Africa and the Congo Craton. The GIS and GEOSOFT v6.5 softwares are used to treat the data. This analysis enabled us to explore our study area from surface right to the base. The Tilt Angle method is used to delineate geological structures and to estimate the depth. The Euler’s deconvolution method is used to estimate the specific depth of structural contacts. We estimate the northern boundary of the Congo Craton and southern boundary of the Pan-African starting from 3 ° 7'N of West to 3 ° 75'N of East. Its depth is estimated around 2.6 km for deep and 0.1 km for shallow while the direction is WSW-ENE and the NW slope varies from 30 ° to 60 ° . We obtain that main and minor lineaments exist throughout, from the surface to the base of the area with their principal direction being SW-NE. We also obtain the vertical gradient contact and the quasihorizontal contact. This is proof of the subduction of the Pan-African belt under the Congo Craton due to the intense collision which caused the rejuvenation of the crust. The main consequence of this collision is the formation of pudding and fold structures, beginning from the superficial part right to the base and which caused the intrusion of schistose, chlorite-schist, quartzite in the micaschist and the intrusions of gneiss and garnetiferous schist in the migmatite. In our study, we highlight the presence of 37 major and 523 minor lineaments that localize the circulation of minerals. The probable slope of the lineaments in the northern part of the region varies from 30 ° to 60 ° in a SE direction while in the southern part, and it varies from 30 ° to 60 ° in a NW direction.
Toteu, S.F., Yongue-Fouateu, R., Penaye, J., Tchakounte, J., Seme-Mouangue, A.C., Van-Schmus, R.W., Deloule, E. and Stendal, H. (2006) U-Pb Dating of Plutonic Rocks Involved in the Nappe Tectonic in Southern Cameroon: Consequence for the Pan-African Orogenic Evolution of the Central African Fold Belt. Journal of African Earth Sciences, 44, 479-493.
Abdelsalam, M.G., liégeois, J.P. and Stern, R.J. (2002) The Saharan Metacraton. Journal of African Earth Sciences, 34, 119-136.
Castaing, C., feybesse, J.L., Thieblemont, D., Triboulet, C. and Chèvremont, P. (1994) Paleogeographical Reconstructions of the Pan-African/Brasilianoorogen: Closure of an Oceanic Domain or Intracontinental Convergence between Major Blocks? Precambrian Research, 67, 327-344.
Nzenti, J.P., Barbey, P., Macaudiere, J. and Soba, D. (1988) Origin and Evolution of the Precambrian High Grade Yaoundé Gneiss (Cameroon). Precambrian Research, 38, 91-109.
Nzenti, J.P., Barbey, P., Jegouzo, P. and Moreau, C. (1984) Un nouvel exemple de ceinture granulitique dans une chaine protérozoique de collision: Les migmatites de Yaoundé au Cameroun. Comptes Rendu de l’Académie des Sciences de Paris, 299, 1197-1199.
Shandini, N.Y., Tadjou, J.M., Tabod, C.T. and Fairhead, J.D. (2010) Gravity Data Interpretation in the Northern Edge of the Congo Craton, South-Cameroon. Anuário do Instituto de Geociências, 33, 73-82.
Tadjou, J.M., Nouayou, R., Kamguia, J., Kande, H.L. and Manguelle-Dicoum, E. (2009) Gravity Analysis of the Boundary between the Congo Craton and the Pan-African Belt of Cameroon. Australian Journal of Earth Sciences, 102, 71-79.
Manguelle-Dicoum, E., Bokosah, A.S. and Kwende-Mbanwi, T.E. (1992) Geophysical Evidence for a Major Precambrian Schist-Granite Boundary in Southern Cameroon. Tectonophysics, 205, 437-446.
Nédélec, A., Macaudière, J., Nzenti, J. and Barbey, P. (1986) évolution structurale et métamorphique des scihtes de Mbalmayo (Cameroun) Implications pour la structure de la zone mo-bile panafricaine d’Afrique centrale au contact du craton du Congo. Comptes Rendus de l’Académie des Sciences, 303, 75-80.
Ndougsa-Mbarga, T., Yufenyiu Layu, D., Quentin Yene-Atangana, J. and Tabod, C. (2014) Delineation of the Northern Limit of the Congo Craton Based on Spectral Analysis and 2.5 D Modeling of Aeromagnetic Data in the Akonolinga-Mbama Area, Cameroon. Geofísica internacional, 53, 5-16.
Ndougsa-Mbarga, T., Manguelle-Dicoum, E., Tabod, C.T. and Mbom-Abane, S. (2003) Modélisation d’anomalies gravimétriques dans la région de Mengueme-Akonolinga (Cameroun). Science, Technology and Development, 10, 64-74.
Ndougsa-Mbarga, T., Meying, A., Bisso, D., Sharma, K.K., Layu, D.Y. and Manguelle-Dicoum, E. (2011) Audiomagnetotelluric (AMT) Soundings Based on the Bostick Approach and Evidence of Tectonic Features along the Northern Edge of the Congo Craton, in the Messamena/Abong-Mbang. The Journal of Indian Geophysical Union, 15, 145-159.
Gazel, J. and Guiraudie, C. (1965) Notice Explicative sur la Région Abong-Mbang Ouest de la Carte Géologique de Reconnaissance à l’échelle du 1/500.000. Direction des Mines et Géologie, Yaoundé, 29 p.
Feumoe, A.N.S., Ndougsa-Mbarga, T., Manguelle-Dicoum, E. and Derek Fairhead, J. (2012) Delineation of Tectonic Lineaments Using Aeromagnetic Data for the South-East Cameroon Area. Geofizika, 29.
Gazel, J. (1955) Notice Explicative sur la Région Batouri-Ouest Ouest de la Carte Géologique de Reconnaissance à l’échelle du 1/500.000. Direction des Mines et Géologie, Yaoundé, 23 p.
Paterson, Grant, Watson Ltd. (1976) Etudes aeromagnetiques sur certaines Régions de la République Unie du Cameroun. Rapport d’interprétation. ACDI, Toronto, 190 p.
Olinga, J.B., Mpesse, J.E., Minyem, D., Ngako, V., Ndougsa-Mbarga, T. and Ekodeck, G.E.(2010) The Awaé-Ayos Strike-Slip Shear Zones (Southern-Cameroon) Geometry, Kinematics and Significance in the Late Pan African Tectonics. Neues Jahrbuch für Geologie und Palaontologie-Abhandlungen, 257, 1-11. https://doi.org/10.1127/0077-7749/2010/0042
Bessoles, B. and Lasserre, M. (1977) Le complxe de base du Cameroun. Bulletin de la Société Géologique de France, 19, 1085-1092. https://doi.org/10.2113/gssgfbull.S7-XIX.5.1085
Toteu, S.F., Penaye, J. and Poudjom Djomani, Y. (2004) Geodynamic Evolution of the Pan-African Belt in Central Africa with Special Reference to Cameroon. Canadian Journal of Earth Sciences, 41, 73-85. https://doi.org/10.1139/e03-079
Djouka, F.M.L., Schüssler, U. and Tchouankoue, J.P. (2004) Geochemistry and Petrogenesis of Neoproterozoicgranitoids within the Central African Fold Belt in the Bafoussam Area, Western Cameroon (Central Africa). University of Wuerzburg, 4 p.
Noutchogwe, C., Tabod, C. and Manguelle-Dicoum, E. (2006) A Gravity Study of the Crust beneath the Adamawa Fault Zone, West Central Africa. Journal of Geophysics and Engineering, 3, 82-89. https://doi.org/10.1088/1742-2132/3/1/009
Meying, A., Ndougsa-Mbarga, T. and Manguelle-Dicoum, E. (2009) Evidence of Fractures from the Image of the Subsurface in the Akonolinga-Ayos Area (Cameroon) by Combining the Classical and the Bostick Approaches in the Interpretation of Audio-Magnetotelluric Data. Journal of Geology and Mining Research, 1, 159-171.
Mvondo, H., Owona, S., Mvondo-Ondoa, J. and Essono, J. (2007) Tectonic Evolution of the Yaoundé Segment of the Neoproterozoic Central African Orogenic Belt in Southern Cameroon. Canadian Journal of Earth Sciences, 44, 433-444. https://doi.org/10.1139/e06-107
Mbom-Abane, S. (1997) Investigations géophysiques en bordure du craton du Congo (régiond’AbongMbang/Akonolinga, Cameroun) et implications structurales. PhD Thesis, Université de Yaoundé I, 180 p.
Grauch, V.J.S., Bauer, P.W. and Kelson, K.I. (2004) Preliminary Interpretation of High-Resolution Aeromagnetic Data Collected near Taos, New Mexico. New Mexico Geological Society, 55th Field Conference, Guidebook, 244-256.
Salem, A., William, S., Fairhead, D., Ravat, D. and Smith, R. (2007) Tilt-Depth Method: A Simple Depth Estimation Method Using First-Order Magnetic Derivatives. The Leading Edge, 150, 2-5. https://doi.org/10.1190/1.2821934
Verduzco, B., Fairhead, J.D., Green, C.M. and MacKenzie, C. (2004) New Insights into Magnetic Derivatives for Structural Mapping. The Leading Edge, 23, 116-119. https://doi.org/10.1190/1.1651454
Miller, H.G. Singh, V. (1994) Potential Field Tilt a New Concept for Location of Potential Field Sources. Journal of Applied Geophysics, 32, 213-217.
Reid, A.B., Allsop, J.M., Granser, H., Millett, A.J. and Somerton, I.W. (1990) Magnetic Interpretation in Three Dimensions Using Euler Deconvolution. Geophysics, 55, 80-90. https://doi.org/10.1190/1.1442774
Durrheim, R.J. and Cooper, R.J. (1998) EULDEP: A Program for the Euler Deconvolution of Magnetic and Gravity Data. Computer and Geosciences, 24, 545-550.
Thompson, D.T. (1982) EUlDPH: A New Technique for Making Computer-Assisted Depth Estimates from Magnetic Data. Geophysics, 47, 31-37. https://doi.org/10.1190/1.1441278
Reid, A.B. and Thurston, J.B. (2014) The Structural Index in Gravity and Magnetic Interpretation: Errors, Uses, and Abuses. Geophysics, 79, J61-J66. https://doi.org/10.1190/geo2013-0235.1
Basseka, C.A., Shandimi, Y. and Tadjou, J.M. (2011) Subsurface Structural Mapping Using Gravity Data of the Northern Edge of the Congo Craton South Cameroon. Geofizika, 28, 229-245.