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Week 13-14 (April 26-May 5) 
  • Influence of plate tectonic setting on metamorphism
    • Divergent boundaries
      • mostly low grade rocks
      • hydrothermal alteration at ridges
    • Convergent boundaries (ocean-ocean, or ocean-continent)
      • paired metamorphic belts (High P-Low T and low P-high T)
    • Convergent boundaries (continent-continent)
      • regional metamorphic rocks (Barrovian type and others)
      • ultra-high pressure rocks
  • Thermobarometry
    • General principles
      • Clapeyron equation
      • geothermometers
      • geobarometers
    • exchange thermometers (ex. Fe-Mg exchange between garnet and biotite)
    • solvus thermometry (ex. feldspar thermometry)
    • net transfer equilibria. Examples:
      • jadeite + quartz = albite
      • "GRAIL"
      • "GASP"
  • Geochronology
    • Review of terms: isotope, radioactive, stable, radiogenic, non-radiogenic
    • derivation of the age equation
    • the isochron method
    • the U-Pb method on low initial Pb minerals (zircon and baddeleyite)
      • concordia
      • normal discordance (effect of Pb-loss)
      • reverse discordance (effect of "inheritance")
    • the 40Ar/39Ar method
      • basis for method
      • "plateau" diagrams
      • argon loss
      • excess argon
    • The closure T or blocking T

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