Table 3 Sulfur speciation and isotopic composition in the surface sediments collected near FPS and FPL

FPS

[AVS], mmol kg^-1 (wt% as FeS)

0.019 (<0.01%)

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[S-Py], mmol kg^-1 (wt% as FeS₂), ‰

18.5 (0.11%)

-0.983 ± 0.025

-0.028 ± 0.007

-0.298 ± 0.140

[S⁰]-tot, mmol kg^-1 (wt% as S⁰), ‰

3152 (10.1%)

-0.048 ± 0.008

-0.030 ± 0.007

-0.371 ± 0.035

FPL

[AVS], mmol kg^-1 (wt% as FeS), ‰

0.432 (<0.01%)

-1.053 ± 0.021

-0.128 ± 0.038

0.216 ± 0.289

[S-Py], mmol kg^-1 (wt% as FeS₂), ‰

227 (1.36%)

0.290 ± 0.016

-0.040 ± 0.001

-0.219 ± 0.140

[S⁰]-tot, mmol kg^-1 (wt% as S⁰), ‰

6574 (21.1%)

0.701 ± 0.067

-0.043 ± 0.015

-0.139 ± 0.053