FS01.jpgJPEG image324KA: Location map of the Lau Basin showing the spreading centres and rifts (solid lines), contours of present and past subduction zones (dotted lines) and the outreach of active subduction components [Martinez and Taylor, 2002] (dashed line). RR–Rochambeau Rifts, NWLSC–North-West Lau Spreading centre, CLSC–Central Lau Spreading Centre, PR + ETZ–Peggy Ridge and Extensional Transform Fault, FRSC–Fonualei Rift Spreading Centre. The PR marks the plate boundary between the Australian plate and the Niuafou'ou microplates. B) Discrimination diagram [Pearce and Peate, 1995] for MORB-OIB vs. IAB for CLSC, FRSC, and FAMOUS samples in comparison with global MORB [Jenner and O'Neill, 2012];
FS02.jpgJPEG image7702KSeafloor bathymetry map and locations of Lau basin CLSC samples analysed in this study.
FS03.jpgJPEG image871KIron isotope results for the IRMM-014 standard reference material analysed in the analytical sessions during which the data were collected
text01.docxWord 2007 document32KAnalytical methods used to create the data listed in tables 1, 2 and 3 and a full reference list for all references cited in the auxiliary material.
TS01.docxWord 2007 document16KFe isotope data, iron isotope data for the samples used in this study, the data in this table is displayed in Figure 2B in the main manuscript.
TS02.docxWord 2007 document16KStandard reference material, SRM analysed in the course of this study
TS03.docxWord 2007 document18KHf-Nd isotope data, hafnium-neodymium isotope compositions
TS04.docxWord 2007 document16KMajor element composition, as displayed in figure 2B in the main manuscript
ReadMe.docxWord 2007 document23Ksupporting information

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