OXYGEN ISOTOPE EVIDENCE FOR RECYCLED CRUST IN THE SOURCE OF EM-TYPE OCEAN ISLAND BASALTS
JD WOODHEAD, P GREENWOOD, RS HARMON, P STOFFERS
NATURE | MACMILLAN MAGAZINES LTD | Published : 1993
The oxygen isotope compositions of fresh volcanic glasses from submarine volcanoes of 'enriched mantle' (EM-1 and EM-11) type appear to require the presence of subducted crustal components in the source of these lavas. These data confirm earlier inferences from trace elements and radiogenic isotopes, and also provide a rare opportunity to estimate the proportion of subducted material that reaches the source region of ocean island basalts. © 1993 Nature Publishing Group.