Subduction-related halogens (Cl, Br and I) and H2O in magmatic glasses from Southwest Pacific Backarc Basins
Mark A Kendrick, Richard J Arculus, Leonid V Danyushevsky, Vadim S Kamenetsky, Jon D Woodhead, Masahiko Honda
Earth and Planetary Science Letters | ELSEVIER | Published : 2014
Submarine magmatic glasses from the Manus, Woodlark, North Fiji and Lau backarc basins in the Southwest Pacific, and Volcano A on the volcanic front of the Tonga Arc adjacent to the Lau Basin, were investigated to characterise the Cl, Br and I elemental budgets in subduction systems. In particular we seek to determine the extent of variability in the Br/Cl and I/Cl ratios of backarc basin basalts (BABB) and evaluate if these ratios could improve constraints on the source of subducted volatile components in backarc basins worldwide. The selected glasses represent variably evolved melts of boninite, basalt, basaltic-andesite, dacite and rhyolite composition and were selected from spreading cen..View full abstract
Awarded by Australian Research Council QEII Fellowship
Dr M.A. Kendrick was the recipient of an Australian Research Council QEII Fellowship (project number 0879451). Prof. V.S. Kamenetsky is funded by a University of Tasmania "New Stars" Professorial Fellowship. The samples used in this study were recovered during voyages of the RV Southern Surveyor, RV Franklin, FS Sonne, RV Kana Keoli, RV Moana Wave encompassing a period of more than 30 years. The various crews of these ships and the national funding agencies (the Australian National Marine Facility and German Research Ministry) and lead scientists on these voyages are thanked for making these voyages possible. Mike Perfit is thanked for supplying Woodlark samples to M.H., and John Sinton for supplying the Manus samples to J.W. Technical staff in several laboratories including Stanislav Szczepanski, Alan Greig, Graham Hutchinson (Umelb), Maya Kamenetsky, Thomas Rodemann, Karsten Goemann (UTas) and Igor Yatsevich (ANU) are gratefully acknowledged for making the analytical work possible. We are grateful to Peter Michael and two anonymous EPSL reviewers for constructive comments that improved the clarity of this manuscript.