“…Subsequent work on different continental magmatic-hydrothermal and metamorphic Fe-Cu-Au-Sn-W sulfide ore deposits confirmed notable Fe isotope variations in pyrite over a range of at least ~2‰, whereas other major Fe-bearing minerals such as chalcopyrite, pyrrhotite or magnetite usually exhibit smaller variations of 57 Fe values (Markl et al, 2006;Wang et al, 2011;Cheng et al, 2015;Pi et al, 2015;Wawryk and Foden, 2015;Li et al, 2018;Zhu et al, 2018). Likewise, direct data for dissolved iron isotope compositions in modern hydrothermal fluids from MOR show variations of 57 Fe values over at least 1.5‰ (e.g., Sharma et al, 2001;Beard et al, 2003;Rouxel et al, 2008;Bennett et al, 2009;Syverson et al, 2017).…”