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Week 11: April 12-14

Metamorphic Rocks
  • Definition of metamorphism
  • Prograde metamorphism
  • Retrograde metamorphism
  • Diagenesis, metamorphism, and melting
  • Controls on upper and lower bounds of metamorphism
    • rock type
    • presence or absence of fluids
    • stress
  • Broad types of metamorphism
    • Burial metamorphism
    • Regional metamorphism
      • foliations
        • slaty cleavage
        • schistosity
        • gneissic foliation
      • lineations
    • Contact metamorphism
    • Seafloor metamorphism
    • Shock/impact metamorphism
    • Dynamic metamorphism
  • Metamorphic rock classification
    • Based on nature of parent material
      • metapelite
      • metapsammite
      • quartzite
      • calc-silicate
      • marble
      • metabasite
      • serpentinite
    • Based on texture
      • slate
      • phyllite
      • schist
      • gneiss
      • migmatite
      • mylonite
      • hornfels
    • Based on mineralogy
      • As dominant mineral
        • quartzite
        • marble
        • serpentinite
        • hornblendite
        • epidosite
        • etc...
      • As a qualifier to names (For example, "mica schist", "garnet gneiss", "garnet amphibolite", etc.)
    • Special names (based on combinations of the above criteria):
      • greenschist
      • blueschist
      • amphibolite
      • eclogite
      • granulite
      • skarn
  • What take place during metamorphism?
    • Textural changes
      • increase in grain size
      • development of foliation/lineation
      • metamorphic differentiation
    • Mineralogic changes
      • Solid-solid reactions
        • discontinuous reactions
          • single mineral - polymorphic reactions
          • polymineralic reactions
        • continuous reactions
          • dehydration reactions
          • decarbonation reactions
          • oxidation-reduction reactions
    • Metasomatism

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