Geofluids

Research Article

Hydrogeochemistry, Geothermometry, and Genesis of the Hot Springs in the Simao Basin in Southwestern China

Table 2

Chemical compositions of hot springs in the Simao Basin (mg/L).


Sample name	Wana hot spring	Qingping hot spring		Ximen spring	Xiling hot spring		Manzhongtian hot spring	Zhengdong hot spring		Erguanzhai hot spring	Nanni hot spring		Rain water
Sample ID	S1	S2-1	S2-2	S3	S4-1	S4-2	S5	S6-1	S6-2	S7	S8-1	S8-2	SR

(°C)	77.2	62.3	65.8	29.7	32.5	33.4	40.6	40.8	37.9	39.1	39.3	38.9	25.2
pH	7.1	5.6	5.8	6.5	6.2	6.1	5.7	5.6	5.8	6	5.9	6.4	7.2
Eh (mV)	-239	-40	-40	190	198	209	107	102	82	72	88	94	55
TDS	472	1405	1436	354	458	431	3209	1813	1808	2180	1050	1042	38.2
K	5.08	19.6	19.6	5.09	2.59	2.58	38.9	6.81	7.32	10	11.3	10.8	0.64
Na	129	248	259	6.29	5.87	4.66	970	313	365	541	213	190	1.09
Ca	9.59	58.8	60.7	55.9	83.7	65.4	89.3	155	101	96.1	100	123	10.1
Mg	0.72	13.2	14.2	11.8	13.2	11	20.3	61.7	56.1	33.7	9.28	10.8	0.331
Cl	8.09	134	144	5.39	5.82	6.16	1054	332	337	338	366	359	2.87
SO₄	13.7	45.4	47.9	5.2	5.29	6.07	304	426	426	762	6.46	8.35	1.61
HCO₃	270	886	891	264	340	333	732	519	515	399	342	340	21.6
NO₃	1.94	0.04	0.04	/	1.24	1.53	/	/	/	/	2.34	/	/
F	16.7	0.291	0.319	0.39	0.6	0.65	/	/	/	/	/	/	/
Br	0.025	0.14	0.18	0.025	0.025	0.025	0.35	0.07	0.025	0.025	0.1	0.1	0.025
Free CO₂	0	154	132.88	12.19	21.78	21.38	94.42	96.27	54.56	39.47	27.59	23.5	1.19
SiO₂ (aq)	62.3	32.9	47.2	20.9	14.8	17.6	34	25.7	19.8	17.9	13.8	19.3	4.3
B	0.615	/	/	0.02	/	/	0.43	0.07	/	0.46	0.07	0.13	/
Li	0.23	0.46	0.47	0.0047	0.004	0.0037	0.35	0.05	0.052	0.19	0.15	0.15	0.002
Sr	0.15	1.72	1.75	0.22	0.16	0.16	2.37	1.48	1.51	2.14	2.97	3.02	0.014
Rb	0.0768	0.068	0.071	0.0038	0.0014	0.0014	0.076	0.02	0.02	0.026	0.028	0.028	0.0009
Fe	0.053	0.33	0.291	0.082	0.118	0.081	0.096	0.093	0.1	0.099	0.11	0.11	0.077
Zn	0.0024	0.0018	0.0011	0.0079	0.036	0.01	0.012	0.0077	0.0066	0.0063	0.18	0.16	0.014
Ba	0.0053	0.44	0.42	0.038	0.19	0.109	0.0806	0.00604	0.00662	0.0231	0.194	0.195	0.0036
Mn	0.00048	0.207	0.182	0.00087	0.00026	0.00019	0.215	0.00087	0.0012	0.17	0.00071	0.00018	0.001
Hardness	26.91	201.18	210.04	188.17	263.36	208.6	306.58	641.12	483.22	378.74	287.92	351.61	26.5
Alkalinity	235.39	726.23	730.33	216.39	278.69	272.95	600	425.41	422.13	327.05	280.33	278.69	17.7
Acidity	0	175	151	13.85	24.75	24.3	107.3	109.4	62	44.85	31.35	26.7	1.35
Hydrochemical type	HCO₃-Na	HCO₃-Cl-Na	HCO₃-Cl-Na	HCO₃-Ca-Mg	HCO₃-Ca	HCO₃-Ca	Cl-HCO₃-Na	Cl-SO₄-HCO₃-Na-Ca	Cl-SO₄-HCO₃-Na	SO₄-Cl-HCO₃-Na	Cl-HCO₃-Na-Ca	Cl-HCO₃-Na-Ca	HCO₃-Ca
δ²H (‰)	-84.6	-83.1	-86.9	-69.9	-66.3	-69.9	-76.2	-73.2	-60.2	-73.3	-58.9	-56.8	-71.6
δ¹⁸O (‰)	-10.1	-11.2	-12.8	-8.4	-7.9	-8.5	-9	-8.4	-7.6	-8.1	-6.8	-7.3	-9.3

Note: / indicates not detected.