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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

Received: 4 July 2016     Accepted: 12 July 2016     Published: 21 September 2016
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Abstract

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.

Published in Earth Sciences (Volume 5, Issue 5)
DOI 10.11648/j.earth.20160505.11
Page(s) 62-69
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2016. Published by Science Publishing Group

Keywords

Superposed Folds, Type-3 Interference Patterns, Progressive Deformation, Transpressive Tectonic, Pan-African, Kimbi, Cameroon

References
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    Sylvestre Ganno, Evine Laure Tanko Njiosseu, Gus Djibril Kouankap Nono, Timoléon Ngnotué, Philomène Nga Essomba, et al. (2016). 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, 5(5), 62-69. https://doi.org/10.11648/j.earth.20160505.11

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    ACS Style

    Sylvestre Ganno; Evine Laure Tanko Njiosseu; Gus Djibril Kouankap Nono; Timoléon Ngnotué; Philomène Nga Essomba, et al. 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 Sci. 2016, 5(5), 62-69. doi: 10.11648/j.earth.20160505.11

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    AMA Style

    Sylvestre Ganno, Evine Laure Tanko Njiosseu, Gus Djibril Kouankap Nono, Timoléon Ngnotué, Philomène Nga Essomba, et al. 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 Sci. 2016;5(5):62-69. doi: 10.11648/j.earth.20160505.11

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  • @article{10.11648/j.earth.20160505.11,
      author = {Sylvestre Ganno and Evine Laure Tanko Njiosseu and Gus Djibril Kouankap Nono and Timoléon Ngnotué and Philomène Nga Essomba and Jean Paul Nzenti},
      title = {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},
      journal = {Earth Sciences},
      volume = {5},
      number = {5},
      pages = {62-69},
      doi = {10.11648/j.earth.20160505.11},
      url = {https://doi.org/10.11648/j.earth.20160505.11},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.earth.20160505.11},
      abstract = {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.},
     year = {2016}
    }
    

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  • TY  - JOUR
    T1  - 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
    AU  - Sylvestre Ganno
    AU  - Evine Laure Tanko Njiosseu
    AU  - Gus Djibril Kouankap Nono
    AU  - Timoléon Ngnotué
    AU  - Philomène Nga Essomba
    AU  - Jean Paul Nzenti
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    JF  - Earth Sciences
    JO  - Earth Sciences
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    EP  - 69
    PB  - Science Publishing Group
    SN  - 2328-5982
    UR  - https://doi.org/10.11648/j.earth.20160505.11
    AB  - 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.
    VL  - 5
    IS  - 5
    ER  - 

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Author Information
  • Department of Earth Sciences, University of Yaoundé I, Yaoundé, Cameroon

  • Department of Earth Sciences, University of Dschang, Dschang, Cameroon

  • Department of Geology, University of Bamenda, Bambili, Cameroon

  • Department of Earth Sciences, University of Dschang, Dschang, Cameroon

  • Department of Earth Sciences, University of Yaoundé I, Yaoundé, Cameroon

  • Department of Earth Sciences, University of Yaoundé I, Yaoundé, Cameroon

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