Figure 7
Depth profiles and isotopic compositions of sulfur species in Cinder Pool. Detailed legend: Depth profiles of sulfur species in Cinder Pool: (a) H2Stot stands for total sulfide as detected by the method of [56] and includes protonated and deprotonated free sulfide and acid-reactive metal sulfides. ZVS tot stands for total zero-valent sulfur. See text for details. Pay attention to logarithmic scale of concentration axis. Difference in sulfur isotope composition between sulfide and sulfate (circles), ZVS and sulfide (triangles) (b) Large dots depict surface water. Area confined by dotted lines depicts values for sulfur isotopes fractionation by microbial sulfate reduction calculated by [48] for the [54] model.