A History of Andesite Production via Magma Mixing and Mingling Revealed Microscopically at Ngauruhoe Volcano

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Title

A History of Andesite Production via Magma Mixing and Mingling Revealed Microscopically at Ngauruhoe Volcano

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The University of Auckland Library

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ResearchSpace@Auckland

Description

Many andesites erupted at arc volcanoes are the products of magma mixing, and this process could be important in triggering their eruption. Throughout the life of Ngauruhoe volcano (∼2.5 ka), erupted andesites lack macroscopic enclaves or lithological features of mingled magma. However, intricate microscopic features of magma mixing and mingling occur. Plagioclase phenocrysts have a wide range of textures. Their diverse 87Sr/86Sr values (0.7039–0.7060) are mostly discordant with the groundmas...

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Format

Research paper

Research format

Journal article

Date created

2022-10

Creator

Cocker, Kate / Shane, Phil / Cronin, Shane / Stirling, Claudine / Reid, Malcolm

URL

https://hdl.handle.net/2292/66030

Related subjects

37 Earth Sciences / 3703 Geochemistry / 3705 Geology / 3706 Geophysics / Science & Technology / Physical Sciences / Geochemistry & Geophysics / andesite / magma / plagioclase / Sr isotopes / subduction / volcano / NEW-ZEALAND / ZONED CLINOPYROXENE / ERUPTION TRIGGERS / RUAPEHU VOLCANO / ISLAND-ARC / PETROGENESIS / EVOLUTION / ORIGIN / BASALT / 02 Physical Sciences / 04 Earth Sciences / 51 Physical sciences

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