Review Guide For Exam 2 Igneous Mineralogy Bowen’s Reaction Series

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Presentation transcript:

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 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 Caldera formation

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

Understand Source, Path and Evolution !!! Andesites and Granites; predominantly at subduction zones Andesites; fractional crystallization versus contamination Granites; fractional crystallization versus crustal melting Bi-modal volcanism Understand Source, Path and Evolution !!!