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2) a.) Cite some reasons why crustal contamination is more evident in continental arcs than in...

2) a.) Cite some reasons why crustal contamination is more evident in continental arcs than in island arcs

b.) How would you expect 87Sr/86Sr to vary in magmas that traverse a significant thickness of ancient continental crust? 143Nd/144Nd? Why? Why might the CVZ of the Andes show higher 87Sr/86Sr and lower 143Nd/144Nd than the NVZ or SVZ?

c.) How do the major batholith belts relate to continental-arc volcanics? Why are the batholiths exposed in some areas and covered by volcanics in others?

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Amanda K answered 8 months ago
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