Figure 4. Values of d34S and d18O of residual sulfate at Sites 975 (down to 47 mbsf), 976, 977, and 979 as a function of the natural logarithm of the residual sulfate fraction of original sulfate remaining (F). Numbers are sulfur isotope fractionation factors calculated from the regression lines (see text).

Figure 4. Values of

³⁴S and

¹⁸O of residual sulfate at Sites 975 (down to 47 mbsf), 976, 977, and 979 as a function of the natural logarithm of the residual sulfate fraction of original sulfate remaining (F). Numbers are sulfur isotope fractionation factors calculated from the regression lines (see text).