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Structural Characterization of Outcrop-Scale Superposed Folding in the Kimbi Area (NW Cameroon): Implications for the Tectonic Evolution of the Pan-African North Equatorial Fold Belt
Earth Sciences
Volume 5, Issue 5, October 2016, Pages: 62-69
Received: Jul. 4, 2016; Accepted: Jul. 12, 2016; Published: Sep. 21, 2016
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Sylvestre Ganno, Department of Earth Sciences, University of Yaoundé I, Yaoundé, Cameroon
Evine Laure Tanko Njiosseu, Department of Earth Sciences, University of Dschang, Dschang, Cameroon
Gus Djibril Kouankap Nono, Department of Geology, University of Bamenda, Bambili, Cameroon
Timoléon Ngnotué, Department of Earth Sciences, University of Dschang, Dschang, Cameroon
Philomène Nga Essomba, Department of Earth Sciences, University of Yaoundé I, Yaoundé, Cameroon
Jean Paul Nzenti, Department of Earth Sciences, University of Yaoundé I, Yaoundé, Cameroon
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A study of predominantly folding structures was carried out on a number of outcrops in the Kimbi area. The main aim of this study is to provide a detailed structural characterization of the three folding events (F1, F2-F3) recognized in this area, in order to improve our understanding of the deformation mechanisms that controlled the tectonic evolution of the Pan-African North Equatorial Fold belt. The F1 folding is marked by decimetre-sized isoclinal folds with S1 schistosity parallel to the axial plane of F1 folds. The F2-F3 folding is superposed on the F1 older folds. Geometric shapes of F2-F3 folds typically form Ramsay’s type-3 interference patterns. The complex geometry of these folds suggests that they formed by shearing linked to the Central Cameroon shear zone (CCSZ). The Kimbi area superposed F2-F3 folds have been interpreted as the result of progressive deformation dextral transpressive deformation caused by the oblique convergence between the Congo/São Francisco craton and the Eastern Saharan block.
Superposed Folds, Type-3 Interference Patterns, Progressive Deformation, Transpressive Tectonic, Pan-African, Kimbi, Cameroon
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Sylvestre Ganno, Evine Laure Tanko Njiosseu, Gus Djibril Kouankap Nono, Timoléon Ngnotué, Philomène Nga Essomba, Jean Paul Nzenti, Structural Characterization of Outcrop-Scale Superposed Folding in the Kimbi Area (NW Cameroon): Implications for the Tectonic Evolution of the Pan-African North Equatorial Fold Belt, Earth Sciences. Vol. 5, No. 5, 2016, pp. 62-69. doi: 10.11648/
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