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Orogenesis and Crustal Evolution in Archean Barberton, South Africa

Explore subduction-collision in Archean Barberton, South Africa, focusing on high-pressure/low-temperature metamorphism at 3.2 Ga. Discover granites, syenites, and ancient gneisses alongside the intriguing Inyoni shear zone. Delve into the Nelshoogte Pluton and the Komatii fault Bloc for a comprehensive view of crustal evolution.

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Orogenesis and Crustal Evolution in Archean Barberton, South Africa

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  1. Une orogénèse subduction-collisionà l'archéen : métamorphisme HP-BT à 3.2 Ga à Barberton (Afrique du Sud) Gary Stevens (et Jean-François Moyen, Alex Kisters, Johann Diener) Stellenbosch University, South Africa

  2. Percival, 1994 In Condie ed. “Archean crustal evolution”

  3. 2.9 – 2.7 Ga granites 3.1 Ga granites & syenites Moodies Fig Tree Onverwacht Ca. 3.2 Ga TTG Ca. 3.4 Ga TTG « Ancient gneisses » (3.6 – 3.4 Ga)

  4. Diener, 2004

  5. “Inyoni shear zone”

  6. Inyoni shear zone

  7. 500 mm Ab Gt Qz Gt Ab

  8. Ep Gt Cpx Gt Ab 200 mm

  9. 500 mm

  10. 100 mm

  11. Ep+Qz Gt Amp 500 mm

  12. Percival, 1994 In Condie ed. “Archean crustal evolution”

  13. (Pluton de Nelshoogte, syn-extension ?) Komatii fault Bloc “inférieur” (bloc de Stolzburg)

  14. Diener, 2004

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