Juan de Fuca Ridge and East Pacific Rise S isotopes

This dataset is presented in the journal article "Effects of microbial alteration of oceanic crust on sulfur cycling in hydrothermal systems" and includes data from Tables 1, 2, and 3. These data are the results of multiple S isotope analyses of bulk push core sediments, as well as sulfate (anhydrite, barite) and sulfide (pyrite, marcasite, wurtzite, pyrrhotite and chalcopyrite) mineral separates from samples collected from Middle Valley, Endeavour, and Axial Volcano on the Juan de Fuca Ridge, as well as pyrite from 9-10N on the East Pacific Rise.