Journal article
High-K andesite petrogenesis and crustal evolution: Evidence from mafic and ultramafic xenoliths, Egmont Volcano (Mt. Taranaki) and comparisons with Ruapehu Volcano, North Island, New Zealand
RC Price, IEM Smith, RB Stewart, JA Gamble, K Gruender, R Maas
Geochimica Et Cosmochimica Acta | Published : 2016
Abstract
This study uses the geochemistry and petrology of xenoliths to constrain the evolutionary pathways of host magmas at two adjacent andesitic volcanoes in New Zealand's North Island. Egmont (Mt. Taranaki) is located on the west coast of the North Island and Ruapehu lies 140 km to the east at the southern end of the Taupo Volcanic Zone, the principal locus of subduction-related magmatism in New Zealand. Xenoliths are common in the eruptives of both volcanoes but the xenoliths suites are petrographically and geochemically different. Ruapehu xenoliths are predominantly pyroxene–plagioclase granulites derived from Mesozoic meta-greywacke basement and the underlying oceanic crust. The xenolith popu..
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Funding Acknowledgements
This work builds on postgraduate research carried out at Massey University by Kerstin Grunder and Anke Zernack. The technical and analytical support of John Wilmshurst and Jon Woodhead is gratefully acknowledged. Reviews by Simon Turner, Alan Cooper and an anonymous reviewer are gratefully acknowledged as is the advice provided by guest editor Fred Frey. In its earliest stages this project was partially funded by grants from the Australian Research Council and it has received ongoing support from the University of Waikato, the University of Auckland, Massey University, Victoria University Wellington and the University of Melbourne.