The west Bonguen area is located within latitudes 03°25’N to N03°39’N and longitudes 10°04’E to 10°09’ E in South Cameroon. It belongs to the Nyong Series which is the north-western extension of the Congo Craton in Cameroon. In order to highlight the extension of the Kribi-Campo shear zone, petrographic studies and structural analysis were carried out. Mylonitic metagranodiorite outcropping as a large dome in biotite gneiss basement rocks, it is the main rock type in the study area, it is made up of Kfs + Qtz + Bt + Pl + Op. Majority of the minerals shows deformation marks such as sigmoidal shape of Kfs, rolling extension of Qtz ribbons, Subgrains of Qtz and kink-band of Bt. Three (03) deformation phases (D1, D2, and D3) were denoted in Bonguen west. The D1 deformation developed S1 foliation in biotite gneiss basement rocks and is characterized by the alternation of parallel compositional bands and lithological units. The D2 deformation developed S2 mylonitic shistosity, Shear bands (C2-planes) develop oblique to the main S2 mylonitic schistosity (S2-plane) showing dextral ductile shear, V2 veins and B2 boudins. The D3 phase is exclusively highlighted by brittle features such as V3 veins, F3 joints and faults. The area consequently underwent a polyphases ductilo-fragile tectonism dominated by a dextral thrusting kinematics. Bonguen area is here considered as a segment of the northern extension of the Kribi-Campo fault.
| Published in | Earth Sciences (Volume 7, Issue 5) |
| DOI | 10.11648/j.earth.20180705.15 |
| Page(s) | 236-241 |
| 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), 2024. Published by Science Publishing Group |
Bonguen, Kribi-Campo Fault, Ductilo-Fragile Tectonics, Mylonites
| [1] | Clifford, T. N., 1970. The structural framework of Africa. ln T. N. Clifford et I. G. Gass (éds.), African magmatism and Tectonics. Olives and Boyd, Edinburgh, p. 1-26. |
| [2] | Lerouge C., Cocherie A., Toteu S. F., Penaye J., Milesi J.-P., Tchameni R., Nsifa N. E., Fanning C. M., and Deloule E. (2006). – Shrimp U-Pb zircon age evidence for Paleoproterozoic sedimentation and 2.05 Ga syntectonic plutonism in the Nyong Group, southwestern Cameroon: consequences for the Eburnean-Transamazonian belt of NE Brazil and Central Africa. Journal of African Earth Sciences 44, 413-427. |
| [3] | Lasserre, M., and Soba, D., 1976. Age libérien des granodiorites et des gneiss à pyroxènes du Cameroun méridional. Bulletin du BRGM 2, 17–32. |
| [4] | Maurizot, P., Abessolo, A., Feybesse, J. L., Johan, V., Lecomte, P., 1986. Etude et prospection minière du Sud-Ouest Cameroun. Synthèse des travaux de 1978 à 1985. Rapport BRGM 85 CMR 066. |
| [5] | Feybesse, J. L., Johan, V., Triboulet, C., Guerrot, C., Mayaga-Mikolo, F., Bouchot, V., Eko N’dong, J., 1998. The West Central African belt: a model of 2.5–2.0 Ga accretion and two-phase orogenic evolution. Precambrian Research 87, 161–216. |
| [6] | Maurizot, P., 2000. Geological map of south-west Cameroon. Edition BRGM, Orleans. |
| [7] | Madaha Kodjo, V., 2016. Pretrographic and structural characterization of the KRIBI-CAMPO fault in FIFINDA-LONDJI area. Dissertation, DIPES II, Univ. Bda, 93p. |
| [8] | Kankeu, B., Greiling, R. O., Nzenti, J. P., Ganno, S., Danguene, P. Y. E., Bassahak, J., Hell, J. V., 2017. Contrasting Pan-African structural styles at the NW margin of the Congo Shield in Cameroon. Journal of African Earth Sciences, http://dx.doi.org/10.1016/j.jafrearsci.2017.06.002. |
| [9] | Nedelec, A., Nsifa, E., Martin, H., 1990. Major and trace element geochemistry of the Archaean Ntem plutonic complex (South Cameroon): petrogenesis and crustal evolution. Precambrian Research 47, 35-50. http://dx.doi.org/10.1016/0301-9268(90)90029-P. |
| [10] | South-West Cameroon of two doleritic episodes initiating the Eburnean (Palaeoproterozoic) and Pan-African (Neo-proterozoic) orogenic cycles, In: Comptes rendus de l'academie des sciences serie ii fascicule des Sciences de la Terre et des planetes 323, 575-582. |
| [11] | Ndema Mbongue, J. L., Ngnotué, T., Ngo Nlend, C. D., Nzenti, J. P., and Suh, C. E., 2014. Origin and evolution of the formation of the Cameroon Nyong series in the western border of the Congo craton. Journal of Geosciences and Geomatics 2, 62-75. |
| [12] | Ganno, S., Moudioh, C., Nzina Nchare, A., Kouankap Nono, G. D., and Nzenti, J. P., 2015. Geo-chemical fingerprint and iron ore potential of the siliceous itabirite from Palaeoproterozoic Nyong series, Zambi area, Southwestern Cameroon. Resource Geology 66, 71–80. |
| [13] | Maurizot, P., Abessolo, A., Feybesse, J. L., Johan, V., Lecomte, P., 1985. Etude et prospection minière du Sud-Ouest Cameroun. Synthèse des travaux de 1978 à 1985. Rapport BRGM 85, CMR 066, 274 p. |
| [14] | Shang C, K., Liégeois J, P., Satir, M., Frisch, W., and Nsifa. E. N., 2010. Late Archaean high-K granite geochronology of the northern metacratonic margin of the Archaean Congo craton, Southern Cameroon: Evidence for Pb-loss due to non-metamorphic causes. International Association for Gondwana Research 475, 19p. |
| [15] | Njonfang, E., Moreau, C., Tchoua, F. M., (1998). La bande mylonitique Foumban-Bankim. Ouest Cameroon. Une zone de cisaillement de haute temperature. Comptes Rendus Academie des sciences, Paris, 327, PP 735-741. |
| [16] | Njonfang Emmanuel, Ngako Vincent, Kwekam Maurice, Affaton Pascal (2006). Les orthogneiss calco-alcalins de Foumban–Bankim: témoins d’une zone interne de marge active panafricaine en cisaillement. C. R. Geoscience 338 (2006) 606–616. |
| [17] | Fossen, H., 2016. Structural Geology, second ed. Cambridge University Press. |
| [18] | Mukherjee, S., 2014. Atlas of Shear Zone Structures in Meso-scale, Springer Geology, p128. DOI: 10.1007/978-3-319-00089-3_4. |
APA Style
Kouankap Nono Gus Djibril, Njiosseu Tanko Evine Laure, Takodjou Wambo Jonas Didero, Kamguia Woguia Brice, Afahnwie Ngambu Aloysius, et al. (2018). Petro-Structural Characterization of Bonguen Area, Nyong Series, Cameroon: Insight into the Northern Extension of Kribi-Campo Shear Zone. Earth Sciences, 7(5), 236-241. https://doi.org/10.11648/j.earth.20180705.15
ACS Style
Kouankap Nono Gus Djibril; Njiosseu Tanko Evine Laure; Takodjou Wambo Jonas Didero; Kamguia Woguia Brice; Afahnwie Ngambu Aloysius, et al. Petro-Structural Characterization of Bonguen Area, Nyong Series, Cameroon: Insight into the Northern Extension of Kribi-Campo Shear Zone. Earth Sci. 2018, 7(5), 236-241. doi: 10.11648/j.earth.20180705.15
AMA Style
Kouankap Nono Gus Djibril, Njiosseu Tanko Evine Laure, Takodjou Wambo Jonas Didero, Kamguia Woguia Brice, Afahnwie Ngambu Aloysius, et al. Petro-Structural Characterization of Bonguen Area, Nyong Series, Cameroon: Insight into the Northern Extension of Kribi-Campo Shear Zone. Earth Sci. 2018;7(5):236-241. doi: 10.11648/j.earth.20180705.15
Share This Article
Twitter
Linked In
Facebook
Copy
Download@article{10.11648/j.earth.20180705.15,
author = {Kouankap Nono Gus Djibril and Njiosseu Tanko Evine Laure and Takodjou Wambo Jonas Didero and Kamguia Woguia Brice and Afahnwie Ngambu Aloysius and Fomena Tchinda Hermann and Folah Mewa Cathy Laurianne},
title = {Petro-Structural Characterization of Bonguen Area, Nyong Series, Cameroon: Insight into the Northern Extension of Kribi-Campo Shear Zone},
journal = {Earth Sciences},
volume = {7},
number = {5},
pages = {236-241},
doi = {10.11648/j.earth.20180705.15},
url = {https://doi.org/10.11648/j.earth.20180705.15},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.earth.20180705.15},
abstract = {The west Bonguen area is located within latitudes 03°25’N to N03°39’N and longitudes 10°04’E to 10°09’ E in South Cameroon. It belongs to the Nyong Series which is the north-western extension of the Congo Craton in Cameroon. In order to highlight the extension of the Kribi-Campo shear zone, petrographic studies and structural analysis were carried out. Mylonitic metagranodiorite outcropping as a large dome in biotite gneiss basement rocks, it is the main rock type in the study area, it is made up of Kfs + Qtz + Bt + Pl + Op. Majority of the minerals shows deformation marks such as sigmoidal shape of Kfs, rolling extension of Qtz ribbons, Subgrains of Qtz and kink-band of Bt. Three (03) deformation phases (D1, D2, and D3) were denoted in Bonguen west. The D1 deformation developed S1 foliation in biotite gneiss basement rocks and is characterized by the alternation of parallel compositional bands and lithological units. The D2 deformation developed S2 mylonitic shistosity, Shear bands (C2-planes) develop oblique to the main S2 mylonitic schistosity (S2-plane) showing dextral ductile shear, V2 veins and B2 boudins. The D3 phase is exclusively highlighted by brittle features such as V3 veins, F3 joints and faults. The area consequently underwent a polyphases ductilo-fragile tectonism dominated by a dextral thrusting kinematics. Bonguen area is here considered as a segment of the northern extension of the Kribi-Campo fault.},
year = {2018}
}
TY - JOUR T1 - Petro-Structural Characterization of Bonguen Area, Nyong Series, Cameroon: Insight into the Northern Extension of Kribi-Campo Shear Zone AU - Kouankap Nono Gus Djibril AU - Njiosseu Tanko Evine Laure AU - Takodjou Wambo Jonas Didero AU - Kamguia Woguia Brice AU - Afahnwie Ngambu Aloysius AU - Fomena Tchinda Hermann AU - Folah Mewa Cathy Laurianne Y1 - 2018/10/24 PY - 2018 N1 - https://doi.org/10.11648/j.earth.20180705.15 DO - 10.11648/j.earth.20180705.15 T2 - Earth Sciences JF - Earth Sciences JO - Earth Sciences SP - 236 EP - 241 PB - Science Publishing Group SN - 2328-5982 UR - https://doi.org/10.11648/j.earth.20180705.15 AB - The west Bonguen area is located within latitudes 03°25’N to N03°39’N and longitudes 10°04’E to 10°09’ E in South Cameroon. It belongs to the Nyong Series which is the north-western extension of the Congo Craton in Cameroon. In order to highlight the extension of the Kribi-Campo shear zone, petrographic studies and structural analysis were carried out. Mylonitic metagranodiorite outcropping as a large dome in biotite gneiss basement rocks, it is the main rock type in the study area, it is made up of Kfs + Qtz + Bt + Pl + Op. Majority of the minerals shows deformation marks such as sigmoidal shape of Kfs, rolling extension of Qtz ribbons, Subgrains of Qtz and kink-band of Bt. Three (03) deformation phases (D1, D2, and D3) were denoted in Bonguen west. The D1 deformation developed S1 foliation in biotite gneiss basement rocks and is characterized by the alternation of parallel compositional bands and lithological units. The D2 deformation developed S2 mylonitic shistosity, Shear bands (C2-planes) develop oblique to the main S2 mylonitic schistosity (S2-plane) showing dextral ductile shear, V2 veins and B2 boudins. The D3 phase is exclusively highlighted by brittle features such as V3 veins, F3 joints and faults. The area consequently underwent a polyphases ductilo-fragile tectonism dominated by a dextral thrusting kinematics. Bonguen area is here considered as a segment of the northern extension of the Kribi-Campo fault. VL - 7 IS - 5 ER -
Information
Email: