Multiple sulfur isotopes fractionations associated with abiotic sulfur transformations in Yellowstone National Park geothermal springs

Table 1 Temperature, pH and concentrations of sulfur species in YNP springs

Spring	FPL	FPS	DS	EPS	OCS	CP, 0 m depth	CP, 4 m depth	CP, 8 m depth	CP, 12 m depth	CP, 16 m depth
pH	1.7	3.5	3.4	6.5	7.4	4.7	4.7	4.7	4.7	4.2
T,°C	72	74	76	81	93	75	75	76	77	79
[SO₄^2-]	5659 ± 40	520 ± 5	1276 ± 15	984 ± 8	158	557	563	552	564	562
[Cl-]/[SO₄^2-]	0.068	0.256	8.65	14.2	58.2	28.9	28.5	29.9	29.9	30.4
[H₂S]	32.8 ± 0.8	52.3 ± 1.1	121.1 ± 8.3	15.5 ± 1.0	30.7 ± 2.2	28.7 ± 5.4	26.2 ± 0.8	26.1 ± 1.1	22.8 ± 1.0	25.5 ± 0.7
[S⁰]_total	461 ± 205	91.7 ± 8.6	5.52 ± 3.32	3005 ± 504	0.148 ± 0.063	14.8 ± 2.7	15.1 ± 3.0	13.3 ± 0.5	47.9 ± 49.1	27.2 ± 7.5
[S⁰]_cyanolysis	1.05 (0.2)	37.5 (40.9)	0.922 (16.7)	26.5 (0.9)	n.a.	3.29 (22.3)	2.95 (19.6)	4.33 (32.5)	4.19 (8.7)	2.78 (10.2)
[S₂O₃^2-]	5.29 ± 0.19	2.94 ± 0.06	3.79 ± 0.36	559 ± 25	4.02 ± 2.34	127.8 ± 4.6	125.6 ± 1.8	125.2 ± 2.5	129.9 ± 3.9	126.1 ± 1.4
[SO₃^2-]	0.365 ± 0.090	0.584 ± 0.060	1.47 ± 0.08	2.57 ± 0.70	1.07 ± 0.60	4.49 ± 0.49	4.76 ± 0.07	3.30 ± 1.84	4.49 ± 0.38	4.16 ± 0.39
[SCN^-]	0.192 ± 0.013	0.164 ± 0.005	0.196 ± 0.013	0.240 ± 0.030	0.791	0.133	0.595	0.138	0.311	0.431

ISSN: 1467-4866