Peralkaline rhyolites associated with andesitic arcs of the southwest Pacific

Details Peralkaline rhyolites associated with andesitic arcs of the southwest Pacific Peralkaline rhyolites associated with andesitic arcs of the southwest Pacific

Dec 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977e%26psl..37..230s&link_type=abstract

Earth and Planetary Science Letters, Volume 37, Issue 2, p. 230-236.

Physics

13

Scientific paper

Peralkaline rhyolites are associated with andesitic volcanic arcs in three areas of the southwest Pacific, namely in the D'Entrecasteaux Islands, southeastern Papua New Guinea, and on Mayor Island and in the Kaeo area of Northland, New Zealand. Peralkaline rhyolites are characteristically related to tensional crustal environments. Although their occurrence in the southwest Pacific is anomalous in the tectonic context of the associated andesites, the generation of peralkaline rhyolite magmas can be correlated with a change to a tensional tectonic environment which marks an important stage in the evolution of the associated arcs.

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