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Week 7: Feb. 28 - March 3
Igneous rocks
of convergent margins
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Review of subduction
zones (trench, accretionary prism, volcanic arc, forearc, backarc, mantle
wedge, Wadati-Benioff zone, etc.)
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Apparent problem of
generating magma where cold material is being subducted
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Rock types in ocean-ocean
convergent margins and the question of primary magmas
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Melting of the mantle
wedge by addition of water and lowering of solidus
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Source of water in subduction
zones
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immature and mature
island arcs
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origins of more silicic
magmas in island arcs
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assimilation and fractional
crystallization
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origins of granitic
batholiths
Petrology
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