Petrogenesis of Neoproterozoic Granitoids and Related Rocks from the Seychelles: the Case for an Andean-type Arc Origin

@article{Ashwal2002PetrogenesisON,
  title={Petrogenesis of Neoproterozoic Granitoids and Related Rocks from the Seychelles: the Case for an Andean-type Arc Origin},
  author={L. Ashwal and D. Demaiffe and T. Torsvik},
  journal={Journal of Petrology},
  year={2002},
  volume={43},
  pages={45-83}
}
compositions ( Nd 750 = +5·46 to −0·87; ISr 750 = 0·7021– The Seychelles islands consist of undeformed and unmetamorphosed, 0·7061) that can be modelled as basaltic magmas derived from metaluminous monzogranites and granodiorites of Neoproterozoic depleted mantle, variably contaminated (0–15%) by Archaean age (>750 Ma). Subsolvus, and lesser hypersolvus granitoids are silicic crust. All petrologic, petrographic, geochemical, isotopic and crosscut by coeval dolerite dykes, dominantly of olivine… Expand
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