Table 2.

Major geochemistry measurements for the collected samples at Yellowstone Lake.

	Variable	SRF-YL340	SRF-YL354	SRF-YL347∗	SRF-YL355	MIX-YL360	MIX-YL370	VNT-YL352	VNT-YL359	VNT-YL369
	pH	6.8	7.0	6.1	7.1	5.6	6.6	6.4	5.6	6.0
	Temp (°C)	11.2	13.0	12.2	12.3	25.5	26.0	65.5	48.0	56.5
	DOC (μM)	166	185	166	343	299	-	148	390	-
Anions	Cl (mM)	0.14	0.13	0.14	0.13	0.15	0.17	0.39	0.14	1.09
	F (μM)	31.5	29.0	33.0	28.0	33.0	40.0	35.0	32.0	147.0
	NO3 (μM)	1.30	0.40	0.07	0.05	0.58	1.80	0.59	0.53	4.82
	SO4 (mM)	0.07	0.08	0.08	0.07	0.08	0.09	0.08	0.20	0.11
Cations	Ca (mM)	0.13	0.15	0.17	0.15	0.15	0.16	0.18	0.14	0.15
	K (mM)	0.04	0.04	0.06	0.04	0.04	0.04	0.07	0.04	0.11
	Mg (μM)	95.1	85.6	131.0	85.1	80.6	85.1	97.2	80.1	72.4
	Na (mM)	0.39	0.40	0.39	0.40	0.43	0.53	0.89	0.42	2.53
	NH4 (μM)	2.8	3.9	2.6	6.2	37.5	27.2	45.0	8.2	23.4
	Si (mM)	0.16	0.15	0.16	0.15	0.14	0.15	0.32	0.13	0.81
Dissolved gasses	CH4 (μM)	0.1	0.2	2.6	0.1	2.7	-	2.3	6.1	7.6
	CO2 (mM)	0.02	0.01	0.10	0.02	0.57	-	0.48	1.15	2.36
	DIC (mM)	0.56	0.60	0.60	1.80	0.80	-	1.30	1.30	5.60
	H2 (nM)	3	47	762	33	386	-	660	1499	32
	O2 (μM)	313.0	237.5	261.0	273.1	23.1	211.0	118.8	-	197.4
	DS (μM)	-	1.0	2.5	0.1	118.1	0.3	21.7	97.6	11.0
Trace elements	As (μM)	0.26	0.18	0.19	0.18	0.18	0.26	0.40	0.17	3.98
	B (μM)	10.74	8.76	9.19	9.08	10.90	12.42	27.49	10.80	-
	Ba (μM)	0.17	0.22	0.26	0.06	0.81	0.46	0.26	0.34	0.11
	Cs (μM)	0.26	0.01	0.01	0.01	0.01	0.01	0.04	0.01	0.43
	Li (μM)	-	6.83	6.93	6.78	7.09	8.82	18.14	7.01	39.88
	Rb (μM)	0.07	0.03	0.03	0.03	0.02	0.03	0.08	0.03	0.55
	Sr (μM)	0.52	0.56	0.56	0.56	0.57	0.58	0.92	0.56	0.55
	W (μM)	0.05	0.01	0.01	0.01	0.01	0.02	0.02	0.01	0.34
	Zn (μM)	0.13	0.14	0.07	0.15	0.09	0.36	-	-	0.13

-, Missing data or below detection limit; DOC, dissolved organic carbon; DIC, dissolved inorganic carbon; DS, dissolved sulfide.

^∗denotes a water column overlying a highly active vent.

Due to missing values or below detection, parameters including S₂O₃^2-, PO₄^3- and trace elements (Al, Mn, Fe, Ga, Se, Mo, Sb, Pb, V etc.) are not listed.