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High-Mg adakites from Kadavu Island Group, Fiji, southwest Pacific: Evidence for the mantle origin of adakite parental melts

Citation

Danyushevsky, LV and Falloon, TJ and Crawford, AJ and Tetroeva, S and Leslie, RAJ and Verbeeten, AC, High-Mg adakites from Kadavu Island Group, Fiji, southwest Pacific: Evidence for the mantle origin of adakite parental melts, Geology, 36, (6) pp. 499-502. ISSN 0091-7613 (2008) [Refereed Article]

DOI: doi:10.1130/G24349A.1

Abstract

We report here the compositions of primitive high-Mg adakite lavas from the Kadavu Island Group, Fiji. Two distinctive high-Mg adakite compositions are present on Kadavu, and both are strongly enriched in Sr and La, with high Sr/Y (>120) and La/Yb (>30) values. The east Kadavu high-Mg adakite is relatively enriched in K2O and depleted in TiO2 and Nb. Our results from Kadavu suggest that there is an adakite magma series that is the result of complex open-system magmatic processes, including magma mixing between relatively low SiO2 mantle-derived melts of high-Mg adakite composition and high SiO2, low-Mg adakite magma. The results from Kadavu Island suggest that adakite magrna suites worldwide are likely to include primitive high-Mg compositions, despite the lack of field evidence in many cases. © 2008 The Geological Society of America.

Item Details

Item Type:Refereed Article
Research Division:Earth Sciences
Research Group:Geology
Research Field:Igneous and Metamorphic Petrology
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Earth Sciences
Author:Danyushevsky, LV (Professor Leonid Danyushevsky)
Author:Falloon, TJ (Dr Trevor Falloon)
Author:Crawford, AJ (Professor Anthony Crawford)
Author:Tetroeva, S (Ms Sofia Tetroeva)
Author:Leslie, RAJ (Dr Roman Leslie)
Author:Verbeeten, AC (Ms Alicia Carmela Verbeeten)
ID Code:56627
Year Published:2008
Web of Science® Times Cited:27
Deposited By:Centre for Ore Deposit Research - CODES CoE
Deposited On:2009-05-18
Last Modified:2009-05-21
Downloads:0

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