Quantification of Strain of the Pan-African in Mvog-Betsi Area (Yaoundé Group, Cameroon)

Jean Engelbert Mpesse; Joseph Martial Akame; Eric José Messi Ottou; Bernard Njom; Sébastien Owona; Jean Bosco Olinga; Justin Lissom; Joseph Mvondo Ondoa

doi:doi:10.11648/j.ijema.20180602.11

Quantification of Strain of the Pan-African in Mvog-Betsi Area (Yaoundé Group, Cameroon)

Jean Engelbert Mpesse, Joseph Martial Akame, Eric José Messi Ottou, Bernard Njom, Sébastien Owona, Jean Bosco Olinga, Justin Lissom, Joseph Mvondo Ondoa

Published in International Journal of Environmental Monitoring and Analysis (Volume 6, Issue 2)

Received: 30 March 2018 Accepted: 24 April 2018 Published: 25 May 2018

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Abstract

The ductile deformation in the paragneissic bed of Mvog-Betsi in the north-eastern part of Yaounde (Cameroon) appears to be intensive and may be traduced by a high shear rate (more than 10%). Some marker subjects that may quantify this strain are observed. Those are elliptical quartz and feldspar, and folds. The study of elliptical markers shows their preferential orientation. The initial rate R_i of the markers before the strain approaches 3.76, and the harmonic value of R_f is between 1.51 and 1.71. Main orientation Ø_f of strain’s ellipse from the direction of stretching in actual position is situated between -10 and -19. The strain’s rate R_S is comprised between 1.1 and 1.7. The orientation Ø_S of the strain’s ellipse is situated between N10E and N20E. The rate of shortening varies between 20% and 75%.

Published in	International Journal of Environmental Monitoring and Analysis (Volume 6, Issue 2)
DOI	10.11648/j.ijema.20180602.11
Page(s)	40-46
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), 2018. Published by Science Publishing Group

Keywords

Strain, Method, Rate of Deformation, Yaoundé Group, Cameroon

References

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APA Style

Jean Engelbert Mpesse, Joseph Martial Akame, Eric José Messi Ottou, Bernard Njom, Sébastien Owona, et al. (2018). Quantification of Strain of the Pan-African in Mvog-Betsi Area (Yaoundé Group, Cameroon). International Journal of Environmental Monitoring and Analysis, 6(2), 40-46. https://doi.org/10.11648/j.ijema.20180602.11

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ACS Style

Jean Engelbert Mpesse; Joseph Martial Akame; Eric José Messi Ottou; Bernard Njom; Sébastien Owona, et al. Quantification of Strain of the Pan-African in Mvog-Betsi Area (Yaoundé Group, Cameroon). Int. J. Environ. Monit. Anal. 2018, 6(2), 40-46. doi: 10.11648/j.ijema.20180602.11

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AMA Style

Jean Engelbert Mpesse, Joseph Martial Akame, Eric José Messi Ottou, Bernard Njom, Sébastien Owona, et al. Quantification of Strain of the Pan-African in Mvog-Betsi Area (Yaoundé Group, Cameroon). Int J Environ Monit Anal. 2018;6(2):40-46. doi: 10.11648/j.ijema.20180602.11

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@article{10.11648/j.ijema.20180602.11,
  author = {Jean Engelbert Mpesse and Joseph Martial Akame and Eric José Messi Ottou and Bernard Njom and Sébastien Owona and Jean Bosco Olinga and Justin Lissom and Joseph Mvondo Ondoa},
  title = {Quantification of Strain of the Pan-African in Mvog-Betsi Area (Yaoundé Group, Cameroon)},
  journal = {International Journal of Environmental Monitoring and Analysis},
  volume = {6},
  number = {2},
  pages = {40-46},
  doi = {10.11648/j.ijema.20180602.11},
  url = {https://doi.org/10.11648/j.ijema.20180602.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijema.20180602.11},
  abstract = {The ductile deformation in the paragneissic bed of Mvog-Betsi in the north-eastern part of Yaounde (Cameroon) appears to be intensive and may be traduced by a high shear rate (more than 10%). Some marker subjects that may quantify this strain are observed. Those are elliptical quartz and feldspar, and folds. The study of elliptical markers shows their preferential orientation. The initial rate Ri of the markers before the strain approaches 3.76, and the harmonic value of Rf is between 1.51 and 1.71. Main orientation Øf of strain’s ellipse from the direction of stretching in actual position is situated between -10 and -19. The strain’s rate RS is comprised between 1.1 and 1.7. The orientation ØS of the strain’s ellipse is situated between N10E and N20E. The rate of shortening varies between 20% and 75%.},
 year = {2018}
}

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TY - JOUR
T1 - Quantification of Strain of the Pan-African in Mvog-Betsi Area (Yaoundé Group, Cameroon)
AU - Jean Engelbert Mpesse
AU - Joseph Martial Akame
AU - Eric José Messi Ottou
AU - Bernard Njom
AU - Sébastien Owona
AU - Jean Bosco Olinga
AU - Justin Lissom
AU - Joseph Mvondo Ondoa
Y1 - 2018/05/25
PY - 2018
N1 - https://doi.org/10.11648/j.ijema.20180602.11
DO - 10.11648/j.ijema.20180602.11
T2 - International Journal of Environmental Monitoring and Analysis
JF - International Journal of Environmental Monitoring and Analysis
JO - International Journal of Environmental Monitoring and Analysis
SP - 40
EP - 46
PB - Science Publishing Group
SN - 2328-7667
UR - https://doi.org/10.11648/j.ijema.20180602.11
AB - The ductile deformation in the paragneissic bed of Mvog-Betsi in the north-eastern part of Yaounde (Cameroon) appears to be intensive and may be traduced by a high shear rate (more than 10%). Some marker subjects that may quantify this strain are observed. Those are elliptical quartz and feldspar, and folds. The study of elliptical markers shows their preferential orientation. The initial rate Ri of the markers before the strain approaches 3.76, and the harmonic value of Rf is between 1.51 and 1.71. Main orientation Øf of strain’s ellipse from the direction of stretching in actual position is situated between -10 and -19. The strain’s rate RS is comprised between 1.1 and 1.7. The orientation ØS of the strain’s ellipse is situated between N10E and N20E. The rate of shortening varies between 20% and 75%.
VL - 6
IS - 2
ER -

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Author Information

Jean Engelbert Mpesse

Department of Earth Sciences, Faculty of Sciences, University of Douala, Douala, Cameroon
Joseph Martial Akame

Department of Earth Sciences, Faculty of Sciences, University of Yaoundé I, Yaoundé, Cameroon
Eric José Messi Ottou

Department of Earth Sciences, Faculty of Sciences, University of Yaoundé I, Yaoundé, Cameroon
Bernard Njom

Department of Earth Sciences, Faculty of Sciences, University of Yaoundé I, Yaoundé, Cameroon
Sébastien Owona

Department of Earth Sciences, Faculty of Sciences, University of Douala, Douala, Cameroon
Jean Bosco Olinga

Institut of Geological and Mining Research, Yaounde, Cameroon
Justin Lissom

Department of Earth Sciences, Faculty of Sciences, University of Douala, Douala, Cameroon
Joseph Mvondo Ondoa

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

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APA Style

Jean Engelbert Mpesse, Joseph Martial Akame, Eric José Messi Ottou, Bernard Njom, Sébastien Owona, et al. (2018). Quantification of Strain of the Pan-African in Mvog-Betsi Area (Yaoundé Group, Cameroon). International Journal of Environmental Monitoring and Analysis, 6(2), 40-46. https://doi.org/10.11648/j.ijema.20180602.11

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ACS Style

Jean Engelbert Mpesse; Joseph Martial Akame; Eric José Messi Ottou; Bernard Njom; Sébastien Owona, et al. Quantification of Strain of the Pan-African in Mvog-Betsi Area (Yaoundé Group, Cameroon). Int. J. Environ. Monit. Anal. 2018, 6(2), 40-46. doi: 10.11648/j.ijema.20180602.11

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AMA Style

Jean Engelbert Mpesse, Joseph Martial Akame, Eric José Messi Ottou, Bernard Njom, Sébastien Owona, et al. Quantification of Strain of the Pan-African in Mvog-Betsi Area (Yaoundé Group, Cameroon). Int J Environ Monit Anal. 2018;6(2):40-46. doi: 10.11648/j.ijema.20180602.11

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@article{10.11648/j.ijema.20180602.11,
  author = {Jean Engelbert Mpesse and Joseph Martial Akame and Eric José Messi Ottou and Bernard Njom and Sébastien Owona and Jean Bosco Olinga and Justin Lissom and Joseph Mvondo Ondoa},
  title = {Quantification of Strain of the Pan-African in Mvog-Betsi Area (Yaoundé Group, Cameroon)},
  journal = {International Journal of Environmental Monitoring and Analysis},
  volume = {6},
  number = {2},
  pages = {40-46},
  doi = {10.11648/j.ijema.20180602.11},
  url = {https://doi.org/10.11648/j.ijema.20180602.11},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijema.20180602.11},
  abstract = {The ductile deformation in the paragneissic bed of Mvog-Betsi in the north-eastern part of Yaounde (Cameroon) appears to be intensive and may be traduced by a high shear rate (more than 10%). Some marker subjects that may quantify this strain are observed. Those are elliptical quartz and feldspar, and folds. The study of elliptical markers shows their preferential orientation. The initial rate Ri of the markers before the strain approaches 3.76, and the harmonic value of Rf is between 1.51 and 1.71. Main orientation Øf of strain’s ellipse from the direction of stretching in actual position is situated between -10 and -19. The strain’s rate RS is comprised between 1.1 and 1.7. The orientation ØS of the strain’s ellipse is situated between N10E and N20E. The rate of shortening varies between 20% and 75%.},
 year = {2018}
}

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