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Petrographic, Mineralogical and Geothermometric Study of Garnet Hornfels from the Region of Iddeleh Silet Hoggar Occidental Algeria

  • Khedoudja NedjraouiEmail author
  • Abla Azzouni-Sekkal
  • Rekia Kheloui
  • Mohamed Hamoudi
  • Riad Ben El Khazndji
Chapter
Part of the Advances in Science, Technology & Innovation book series (ASTI)

Abstract

The emplacement of Neoproterozoic mafic-ultramafic complexes in the Iddeleh area, Silet Block (Western Hoggar) was associated with garnet hornfels facies contact metamorphism of the Pharusian I metapelites. EPMA data of garnet reveal formation temperatures as high as 900 °C. A later metamorphic event is manifested in the persistence of chlorite schist, in which the chlorite composition (Aliv contents) indicates a temperature range of 300–400 °C. It is, therefore, suggested that juxtaposition of the Silet terrane and the microcontinent LATEA was not the outcome of a collisional regime.

Keywords

Iddeleh Iskel Pharusien I Garnet hornfels EPMA 

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Khedoudja Nedjraoui
    • 1
    Email author
  • Abla Azzouni-Sekkal
    • 2
  • Rekia Kheloui
    • 3
  • Mohamed Hamoudi
    • 1
  • Riad Ben El Khazndji
    • 2
  1. 1.Laboratoire de GéophysiqueFSTGAT – USTHBBabezzouar, AlgiersAlgeria
  2. 2.Laboratoire de métallogénie et du magmatismeFSTGAT – USTHBBabezzouar, AlgiersAlgeria
  3. 3.Ecole Normale SupérieureAlgiersAlgeria

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