Chapter 17: Continental Arcs - Faculty web pages

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$Math 361 Problem Set #5 Due 5 October 2012 - Faculty web pages$

$Math 362 Problem Set #9 â€“ Solution 27 April 2012 - Faculty web ...$

Continental Magmatic Arcs Common characteristic – mixture of rock types • basalt and rhyolite • called bimodal volcanism Direct result of magma interactions w/thicker continental crust Tendency to explosive activity •High SiO 2 content •High viscosity •Increase in H 2 O content •Gas expansion during low P boiling of H 2 O
Continental Magmatic Arcs Batholiths – peculiar to continental margins • Enormous, 10s to 100s thousands of km 2 Composed of 100s of individual plutons •Called granite but actually dominated by granodiorite, tonalite and qtz diorite
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Page 13 and 14: Petrogenesis of continental arc mag
Page 15: Differences between continental arc

Chapter 17: Continental Arcs - Faculty web pages

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