Journal article
The halogen (F, Cl, Br, I) and H2O systematics of Samoan lavas: Assimilated-seawater, EM2 and high-3He/4He components
MA Kendrick, MG Jackson, EH Hauri, D Phillips
Earth and Planetary Science Letters | Published : 2015
Abstract
The Samoan mantle plume samples two or more mantle components including an extreme EM2 composition with 87Sr/86Sr > 0.720 and a primitive component with high 3He/4He. The high 87Sr/86Sr melts have a unique potential to constrain the composition of the EM2 mantle end-member that is commonly attributed to subduction recycling. However, a previous study of H2O, CO2, S, F and Cl in Samoan glasses was hampered by the presence of unresolved assimilated sea water. The current study builds on the earlier work by extending the volatile database to include the trace halogens Br and I, and reporting new volatile data for additional glasses with 87Sr/86Sr up to 0.7125 and 3He/4He up to 15 Ra (Ra is the ..
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Awarded by National Science Foundation
Funding Acknowledgements
Stanislav Szczepanski is thanked for technical assistance in the University of Melbourne noble gas laboratory. Dr Mark Kendrick has been the recipient of an Australian Research Council QEII Fellowship (DP 0879451) and Future Fellowship (FT 130100141). Jackson acknowledges support from NSF grants EAR-1145202 and OCE-1153894. This research used samples recovered by the 1999 AVON2/3 cruise of R/V Melville and the 2005 Alia cruise of the R IV Kilo Moana. We thank Ray Burgess and John Lassiter for constructive reviews, and Tim Elliot for editorial suggestions, that improved the focus of this manuscript.