Pan-African is Pan-Gondwanaland: Oblique convergence drives rotation during 650-500 Ma assembly

JJ Veevers*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

74 Citations (Scopus)

Abstract

Gondwanaland was assembled by 650-570 Ma oblique subduction of ocean floor between cratons, including the Mozambique Ocean between West and East Gondwanaland. Oblique convergence set the cratons into a series of counterrotating cogs that sheared the intervening fold belts. The 550-490 Ma oblique subduction of paleo-Pacific ocean floor beneath Antarctica extended the system of counterrotating cogs and shear deformation to the Transantarctic Mountains and northern Australia. Terminal subduction was followed by epeirogenic uplift and concomitant stripping indicated by ubiquitous ca. 500 Ma K-Ar and apatite fission-track dates. These deep-seated events, recorded by zircons of 650-500 Ma age, and first noted in Africa ("Pan-African"), are now recognized as "Pan-Gondwanaland."

Original languageEnglish
Pages (from-to)501-504
Number of pages4
JournalGeology
Volume31
Issue number6
Publication statusPublished - Jun 2003

Keywords

  • Gondwanaland
  • assembly
  • rotation
  • oblique convergence
  • 650-500 Ma
  • CENTRAL TRANSANTARCTIC MOUNTAINS
  • EAST-ANTARCTICA
  • MOZAMBIQUE BELT
  • BEARDMORE GROUP
  • WEST GONDWANA
  • BRAZIL
  • SUPERCONTINENT
  • GRENVILLE
  • CRATON
  • AGE

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