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Location and migration of Miocene-Quarternary volcanic arcs in the SW Pacific region

Citation

Mortimer, N and Gans, PB and Palin, M and Meffre, SJM and Herzer, RH and Skinner, DN, Location and migration of Miocene-Quarternary volcanic arcs in the SW Pacific region, Journal of Volcanology and Geothermal Research, 190, (1-2) pp. 1-10. ISSN 0377-0273 (2010) [Refereed Article]

DOI: doi:10.1016/J.JVOLGEORES.2009.02.017

Abstract

We report new Ar–Ar and U–Pb ages from ten rocks in the SW Pacific region. Our results (1) establish a northward Late Miocene Australian plate movement rate of 57 mm/a for the Lord Howe hotspot chain; (2) reinforce the previously established widespread nature of Early Miocene subduction-related volcanism in onland and nearshore northern New Zealand; (3) indicate that leucotonalite xenoliths from Raoul Island are the products of Quaternary Kermadec arc magmatism rather than being Cretaceous–Pliocene basement. A synthesis of available SW Pacific data emphasises that while there is a reasonably complete record of subduction-related volcanism from at least 23 Ma to the present day, the process of back-arc basin formation is highly episodic and asymmetric. Subduction-related arcs stabilised along the Taupo–Kermadec–Tonga arc from 2 Ma to the present, along the Taranaki-Colville-Lau trend from 17–6 Ma and along the Three Kings Ridge–Northland Plateau–Northland trend from 23–18 Ma. South of latitude 25°S, back-arc basin opening occurred during the Early Miocene and Quaternary arc volcanic episodes, but does not appear to have accompanied the 17–5 Ma volcanism

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Geology
Research Field:Ore Deposit Petrology
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Earth Sciences
UTAS Author:Meffre, SJM (Dr Sebastien Meffre)
ID Code:69640
Year Published:2010
Web of Science® Times Cited:53
Deposited By:Centre for Ore Deposit Research - CODES CoE
Deposited On:2011-05-09
Last Modified:2011-05-16
Downloads:0

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