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Petrographical and Geochemical Characteristics of the Mauritanides Belts’ Birbirites

  • Didi Ould MoctarEmail author
  • Ali Moukadiri
  • Abdellah Boushaba
  • Sid’Ahmed Ould Mohamed Lemine
  • Michel Dubois
Chapter
Part of the Advances in Science, Technology & Innovation book series (ASTI)

Abstract

The Gouérarate region represents the most important area of birbirites’ outcrops, sited in the Mauritanides Belts. In this paper, the petrological description of such facies is highlighted. The Gouérarate Birbirites are mainly composed of silica (chalcedony and microquartz) and talc, geochemically characterized with high SiO2 level (up to 80%). They are derived from a highly refractory peridotite and serpentinite, which correspond to former dunite, harzburgite and serpentinite. The birbirites are mainly formed of ultramafic rocks’ weathering, which has resulted in the concentration of SiO2 and the transformation of olivine, pyroxene and serpentines into chalcedony, quartz and talc.

Keywords

Mauritanides belts Birbirites Peridotites Serpentinites Weathering 

References

  1. 1.
    Esteban, J., Cuevas, J., José, M., Tubía, J.M., Velasco, F., Vegas, N.: Petrographical and mineralogical characteristics of birbirites from the Ronda peridotites (Betic Cordilleras). Geogaceta 50–1, 39–42 (2011)Google Scholar
  2. 2.
    Ould Moctar, D.: Serpentinisation des ophiolites des zones de suture : exemple des régions d’Agane et de Gouérarate (Zone axiale des Mauritanides, Mauritanie). Thèse Doctorat, Université Sidi Mohamed Ben Abdellah, Maroc, 158p. (2013)Google Scholar
  3. 3.
    Ould Moctar, D., Boushaba, A., Dubois, M.: Serpentinization of mantle formations in the Mauritanides Belt: regions of Agane and Gouérarate (middle-western Mauritania). Arab. J. Geosci. 7, 1985–1992 (2014)CrossRefGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Didi Ould Moctar
    • 1
    Email author
  • Ali Moukadiri
    • 2
  • Abdellah Boushaba
    • 2
  • Sid’Ahmed Ould Mohamed Lemine
    • 4
  • Michel Dubois
    • 3
  1. 1.Ecole Supérieure PolytechniqueNouakchottMauritanie
  2. 2.Université Sidi Mohamed Ben AbdellahFèsMaroc
  3. 3.Université de LilleLilleFrance
  4. 4.Aura Energy MauritaniaNouakchottMauritania

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