Petrogenesis of peralkaline rhyolites in an intra-plate setting: Glass House Mountains, southeast Queensland, Australia

The coeval peraluminous rhyolites apparently result from crustal anatexis in response to the basaltic magma underplating. The small “Daly Gap” exhibited in this rock association is anticipated during the protracted fractional crystallization from basaltic parent to the more evolved felsic varieties.