Pre-eruption thermal rejuvenation and stirring of a partly crystalline rhyolite pluton revealed by the Earthquake Flat Pyroclastics deposits, New Zealand

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Pre-eruption thermal rejuvenation and stirring of a partly crystalline rhyolite pluton revealed by the Earthquake Flat Pyroclastics deposits, New Zealand

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The Earthquake Flat Pyroclastics form a c. 10 km3 rhyolite deposit erupted at c. 50 ka from the margin of Okataina Volcanic Centre, immediately following the caldera-forming eruption of the Rotoiti Pyroclastics (c. 100 km3) from vents c. 20 km to the NE. Earthquake Flat Pyroclastics deposits display textural and compositional complexity on a crystal-scale consistent with rejuvenation of a near-crystalline pluton in the upper crust

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Date created

21 Jun, 2016

Creator

CATHERINE MOLLOY / PHIL SHANE / IAN NAIRN

URL

https://figshare.com/articles/journal_contribution/Pre-eruption_thermal_rejuvenation_and_stirring...

Related subjects

hornblende crystals / Previous isotope studies / New Zealand / rhyolite pluton / 20 km / magma / plagioclase crystals / Pyroclastics deposits / chemical zoning / Pyroclastics form / Microdiorite lithic fragments / basaltic eruption / Rotoiti eruption / Rotoiti deposits / mafic underplating / 10 km 3 rhyolite deposit / NE / 100 km 3 / Fe / Pyroclastics deposits display textural / 50 ka / rimward increases / rejuvenation / crystallization history / pumice lapilli show / Okataina Volcanic Centre / vents c / caldera eruptions / Rotoiti Pyroclastics / Geology

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