Petrogenesis of Volcanic Rocks from Saipan and Rota, Mariana Islands, and Implications for the Evolution of Nascent Island Arcs

K. Reagan, Mark; B. Hanan, B.; T. Heizler, Matthew; Hartman, B.; L. Hickey-Vargas, Rosemary

doi:10.1093/petrology/egm087

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Petrogenesis of Volcanic Rocks from Saipan and Rota, Mariana Islands, and Implications for the Evolution of Nascent Island Arcs

Shared by NobleBlocks on Jan 30, 2008 • 12:00 AM UTC

Authors:

Mark K. Reagan

B. B. Hanan

Matthew T. Heizler

Abstract

An 40Ar/39Ar age of 45·1 Ma determined for lavas from northern Saipan confirms that these high-silica rhyolites erupted during the 'proto-arc' stage of volcanism in the Izu–Bonin–Mariana system, which is characterized elsewhere by eruption of boninitic lavas. Incompatible trace element concentration...

Subject

Geology

Basalt

Geochemistry

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