Chapter 17: Continental Arcs - Faculty web pages
Chapter 17: Continental Arcs - Faculty web pages
Chapter 17: Continental Arcs - Faculty web pages
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Petrogenesis of continental arc magmas<br />
• Complex, multi-source,<br />
multi-stage<br />
• Origin – peridotites of<br />
mantle wedge<br />
• Melting induced by<br />
addition of LIL-enriched<br />
fluids from subducting slab<br />
• Primary magma = olivine<br />
tholeiite basalt<br />
• Pond at base of thick cont<br />
crust and undergo<br />
fractional xstallization,<br />
assimilation, and melting of<br />
lower crustal rocks<br />
Figure <strong>17</strong>-23. Winter (2001) An Introduction to Igneous and Metamorphic<br />
Petrology.
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