Supporting Information for Georgatou et al 2024: Metals, volatiles and lithostratigraphy of Brothers submarine volcano

Table S1. List of samples, reporting sampling details (depth in in meters below sea level-mbsl from caldera floor/J-11 to caldera rim/J-18) and modal mineral and vesicle abundances based on Qemscan analysis.Table S2. Bulk major (XRF), minor (LA-ICP-MS) and trace (Lead Fire-Assay with ICP-MS) element geochemistry of samples corresponding to the vertical transect on the NE Caldera site.Table S3. Matrix/groundmass and interstitial silicate glass chemical composition obtained by EPMA and LA-ICP-MS.Table S4. Description and chemical composition of 62 melt inclusions obtained by EPMA and LA-ICP-MS.Table S5. Description and chemical composition of 66 apatite crystals obtained by EPMA.Table S6a-c.Composition for standards used for whole rock chemistry (-6a), for glass chemistry by EPMA (-6b, including known composition of ETNA secondary standards (Hughes et al., 2018)) and by LA-ICP-MS (-6c) .