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Evolution of a Quaternary peralkaline volcano: Mayor Island, New Zealand

Journal of Volcanology and Geothermal Research
By: , and 

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Abstract

Mayor Island is a Holocene pantelleritic volcano showing a wide range of dispersive power and eruptive intensity despite a very limited range in magma composition of only 2% SiO2. The primary controls on this range appear to have been the magmatic gas content on eruption and a varying involvement of basaltic magma, rather than major-element chemistry of the rhyolites. The ca. 130 ka subaerial history of the volcano contains portions of three geochemical cycles with abrupt changes in trace-element chemistry following episodes of caldera collapse. The uniform major-element chemistry of the magma may relate to a fine balance between rates of eruption and supply and the higher density of the more evolved (Ferich) magmas which could be tapped only after caldera-forming events had removed significant volumes of less evolved but lighter magma. ?? 1992.

Additional publication details

Publication type Article
Publication Subtype Journal Article
Title Evolution of a Quaternary peralkaline volcano: Mayor Island, New Zealand
Series title Journal of Volcanology and Geothermal Research
Volume 51
Issue 3
Year Published 1992
Language English
Larger Work Type Article
Larger Work Subtype Journal Article
Larger Work Title Journal of Volcanology and Geothermal Research
First page 217
Last page 236