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Orogeny and Reactivation to the West and Southeast of the West African Craton

  • Norman Kennedy Grant

Abstract

The term “Pan-African thermotectonic event,” or “orogeny,” has been applied by Kennedy (1964, 1965) to a shield-wide series of metamorphic belts with ages in the range 450–700 m. y., which wrap around and enclose older undisturbed cratonic Precambrian complexes (Fig. 1). This reticulate group of belts has been recognized principally by mineral radiometric ages, which for most part give little information on the earlier history of the belts. In some cases they include folded and metamorphosed equivalents to cratonic sediments and crystalline basement rocks, but in others they consist of metasedimentary, gneissic, and granitic rocks of largely unknown age.

Keywords

Granite Gneiss West African Craton Craton Margin Calcareous Dolomite Deep Structural Level 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1973

Authors and Affiliations

  • Norman Kennedy Grant
    • 1
  1. 1.Department of GeologyOberlin CollegeOhioUSA

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