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Week 5: Feb. 7 - Feb. 11

Phase diagrams (cont'd)
  • 2 component systems with solid solution (Ab-An and Fo-Fa)
  • a closer look - zoning in plagioclase
    • normal zoning
    • reverse zoning
    • oscillatory zoning
    • combinations
  • the effect of H2O on the soidus and liquidus
  • 1st exam on Wednesday 9 Feb.
  • 2 component system with solid solution and a solvus (Kf-Ab)
    • perthite
    • antiperthite
    • effect of H20 on phase relations
    • subsolvus (2 feldspar) granites and hypersolvus (1 feldspar) granites
    • possible generation of peritectic point in Kf-Ab system
    • rapakivi granites
  • 3 component system without solid solution and a simple eutectic (Di-An-Fo)

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