Journal article
Contrasting behaviours of CO2, S, H2O and halogens (F, Cl, Br, and I) in enriched-mantle melts from Pitcairn and Society seamounts
MA Kendrick, MG Jackson, AJR Kent, EH Hauri, PJ Wallace, J Woodhead
Chemical Geology | Published : 2014
Abstract
In order to improve characterisation of volatiles in the EM1 and EM2 mantle sources, which are interpreted to contain subducted sedimentary or lithospheric components, we report electron microprobe, FTIR and SIMS CO2, H2O, S, F and Cl concentrations of variably enriched glasses from Pitcairn and Society seamounts in Polynesia. The analyses complement previously published Cl, Br and I data for some of the same glasses and all the techniques show reasonable agreement of better than 5-9% for S, Cl and H2O. The concentrations of H2O and all the halogens increase as a function of melt evolution with the highest values of 1.6wt.% H2O, 2100ppm F, 1500ppm Cl, 3.7ppm Br and 80ppb I in melts with <2wt..
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Awarded by National Science Foundation
Funding Acknowledgements
The samples used in this study were recovered during cruises of the F/S Sonne and N.O. Jean Charcot and were funded by German Research Ministry and CNRS (France), respectively. We gratefully acknowledge the senior scientists (P. Stoffers and J. L. Cheminee) and crews of these vessels which made the voyages possible. JDW participated in the 1989 SO-65 cruise to Pitcairn and is endebted to Colin Devey for supplying Society samples to him similar to 20 years ago as part of a previous study. Alison Koleszar assisted with electron microprobe and LA-ICP-MS analyses. Dr. Adam Kent was supported by NSF grant OCE 1028707, and Dr Matthew G. Jackson was supported by NSF grants OCE-1061134 and EAR-1145202. Dr Mark Kendrick was the recipient of an Australian Research Council QEII Fellowship (project number DP 0879451).