Endmember B and Li concentration and isotope ratios of high temperature black smoker fluids from Brothers Volcano of SONNE cruise SO253 (South Pacific)

Calculated pure hydrothermal end-member Li and B isotope compositions in high-temperature fluids from Brothers volcano, Kermadec Arc, Western Pacific collected during SO-253 cruise. Boron and Li isotope compositions of the high-temperature vent fluids from Brothers Volcano are in the range of other black smoker fluids from the Western Pacific and imply water-rock interaction at low water/rock ratios.