Geofluids

Research Article

Field Reaction Experiments of Carbonate Minerals in Spring Waters: Natural Analogue of Geologic CO₂ Storage

Table 2

Chemical compositions of spring waters at each measurement point in three runs (mg/L).


Run	Run A			Run B			Run C
Point	I	II	III	I	II	III	I	II	III

Temp. (°C)	54.2	49.7	45.7	53.8	47.8	41.2	50.3	41.0	33.3
pH	7.14	7.17	7.97	6.53	6.54	7.84	7.31	7.26	7.99
Na	1700	1700	1800	1800	1800	1800	1700	1700	1700
K	62	62	63	62	63	63	63	63	64
Ca	110	110	100	110	110	100	110	110	110
Mg	35	35	34	34	35	34	34	310	300
Sr	4.3	4.4	4.1	4.3	4.2	4.0	4.3	4.1	4.0
Ba	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1	0.1
Al	<0.01	<0.01	0.01	<0.01	<0.01	<0.01	<0.01	<0.01	<0.01
Fe	0.06	0.02	0.03	0.34	0.08	0.04	0.07	0.02	0.02
Mn	0.11	0.11	0.10	0.10	0.11	0.09	0.11	0.11	0.11
Cl	2100	2100	2100	2100	2100	2100	2200	3000	3000
HCO₃	1091	1110	1075	1087	1092	1072	1132	1110	1087
SO4	320	320	310	310	320	300	320	320	310
SiO₂	34	34	34	34	34	34	34	34	34
CO₂	72	77	28	261	204	28	69	68	20
	0.87	0.85	1.53	0.23	0.14	1.35	1.01	0.77	1.38
	0.71	0.69	1.37	0.07	−0.02	1.19	0.85	0.61	1.21
	2.60	2.55	3.92	1.31	1.11	3.53	2.85	3.30	4.46
	0.27	0.20	0.88	−0.39	−0.53	0.64	0.36	0.99	1.50
(bars)	0.10	0.09	0.01	0.37	0.31	0.02	0.07	0.06	0.01