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Review Guide For Exam 2

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Review Guide For Exam 2. Igneous Mineralogy Bowen’s Reaction Series Silicate sub-classes; mineral structures and compositions Polytypes Solid solutions Twinning; simple , polysynthetic, penetration Zoning. Igneous Rocks Textures and cooling history

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slide1

Review Guide For Exam 2

  • Igneous Mineralogy
  • Bowen’s Reaction Series
  • Silicate sub-classes; mineral structures
  • and compositions
  • Polytypes
  • Solid solutions
  • Twinning; simple , polysynthetic,
  • penetration
  • Zoning
slide2

Igneous Rocks

Textures and cooling history

Rock names; compositional

classification and mineralogical

Origin of magmas; decompression,

flux and thermal melting

Gas content and viscosity; controls

and consequences

Water content; role in melting and

explosive volcanism

slide3

Tectonic environments

  • Basalts; MORB, OIB (intraplate), Flood
  • Basalts and LIPs, Subduction Zones
  • Know the controls on the production
  • of calc-alkaline versus tholeiitic
  • basaltic magmas
  • Understand layered intrusions and
  • processes of mineral accumulation
  • in a magma chamber
slide4

Andesites and Granites; predominantly

at subduction zones

  • Andesites; fractional crystallization versus contamination
  • Granites; fractional crystallization versus crustal melting
  • Understand Source, Path and
  • Evolution !!!
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