Table 1 The analysis results for water samples in the study area (all hydrochemical compositions are in units of mg/L except for pH).

From: Hydrochemical analysis and identification of open-pit mine water sources: a case study from the Dagushan iron mine in Northeast China

No. of samples	Sample type ID	pH	Ca²⁺	Mg²⁺	Na⁺ + K⁺	HCO₃ˉ	SO₄²ˉ	Clˉ	NO₃ˉ	TDS
D01	2	6.71	42.26	14.80	14.99	117.20	96.15	34.55	7.00	267.99
D02	2	7.50	54.71	45.26	21.08	175.63	178.91	34.59	5.00	427.51
D03	3	7.16	39.79	33.19	17.34	116.99	95.43	34.12	44.00	322.94
D04	3	7.29	54.31	24.62	15.03	161.37	107.35	25.87	7.00	315.45
D05	2	8.03	51.29	23.87	23.53	117.12	167.00	34.49	18.00	378.06
D06	2	7.61	72.41	34.82	16.46	190.45	191.23	34.23	38.00	482.46
D07	3	6.98	47.99	25.02	15.21	205.10	71.61	34.49	18.00	315.99
D08	3	7.95	51.12	34.28	26.98	233.98	119.30	25.78	19.00	394.99
D09	2	7.27	53.70	32.83	20.89	175.37	104.94	47.23	36.00	384.01
D10	4	7.18	52.79	37.30	22.25	204.96	106.83	42.97	25.00	390.77
D11	2	7.07	73.92	62.25	27.83	293.17	191.12	50.93	11.00	564.51
D12	3	7.23	67.15	49.78	30.14	293.05	106.94	60.37	6.00	467.61
D13	2	7.43	60.03	50.98	36.20	234.40	119.31	64.37	44.00	493.39
D14	1	7.03	53.02	42.28	34.24	146.31	143.14	51.53	70.00	467.69
D15	2	6.81	53.88	48.97	26.20	87.90	202.74	51.61	73.00	501.83
D16	3	8.05	48.27	14.92	13.38	160.83	83.52	30.18	11.00	282.28
D17	3	7.14	78.45	53.63	22.48	146.37	214.78	82.12	78.00	602.60
D18	4	7.85	129.74	119.37	103.74	366.25	691.48	34.48	11.00	1,274.55
D19	3	7.18	78.98	27.15	22.69	175.60	107.12	44.12	60.00	428.11
D20	3	7.50	114.40	75.43	29.73	234.40	370.05	65.01	0.60	772.00
D21	3	7.07	74.61	57.33	19.67	322.47	131.22	51.75	24.00	519.93
D22	3	7.51	66.37	29.84	12.54	234.26	155.06	17.25	10.00	408.45
D23	3	7.68	66.38	59.68	18.03	176.15	166.95	42.83	108.00	551.36
D24	3	7.54	81.46	24.87	15.55	190.32	214.65	34.35	24.00	490.52
D25	1	7.07	90.51	70.03	39.25	205.02	274.25	103.05	47.00	578.53
D26	1	7.62	79.58	54.34	42.12	263.70	190.67	68.99	11.00	579.33
D27	4	7.28	60.34	59.68	81.18	276.77	155.04	86.25	15.00	601.36
D28	1	6.89	82.20	49.32	30.49	131.85	274.25	34.43	131.00	668.11
D29	1	7.29	129.32	85.03	80.13	249.05	321.95	133.68	146.00	1,020.28
D30	3	7.08	48.27	24.87	16.99	117.20	119.31	34.50	47.00	349.73
D31	3	7.14	52.98	49.70	12.60	146.50	101.44	21.56	8.00	319.63
D32	1	7.14	108.62	106.23	46.08	307.65	405.42	64.93	73.00	961.27
D33	4	7.80	116.88	98.05	107.09	410.21	262.34	238.33	0.40	1,028.69
D34	1	7.79	171.60	92.02	130.07	454.15	405.21	176.81	9.00	1,213.79
D35	4	7.73	119.17	117.18	97.98	380.90	464.98	120.75	14.00	1,124.81
D36	3	7.07	69.39	54.71	24.56	204.87	238.52	38.47	3.00	531.75
D37	3	6.77	65.85	49.88	20.79	161.05	214.63	47.44	41.00	520.70
D38	1	6.38	67.88	57.30	52.57	160.97	214.55	81.94	12.00	547.05
J1	5	8.19	84.48	49.74	15.88	234.13	226.58	52.03	9.00	554.75
J2	5	8.18	89.53	60.34	19.33	263.70	179.15	77.62	20.00	577.70
J3	5	7.98	131.81	97.83	61.83	351.60	322.34	137.99	87.00	1,014.55
J4	5	7.96	139.27	66.12	67.57	322.30	309.85	120.75	21.00	886.28
J5	5	8.13	134.29	69.39	57.06	292.36	321.77	103.49	38.00	924.91
K1	6	8.17	109.42	76.02	55.21	219.75	417.28	29.99	89.00	887.62
K2	6	8.16	159.16	89.63	56.10	119.16	631.88	29.83	30.00	1,058.21
K3	6	7.96	144.24	82.67	66.19	351.60	369.64	119.36	1.00	960.45

Sample type ID: 1-Alluvial pore aquifer, 2-Eluvium pore aquifer, 3-Bedrock fissure aquifer, 4-River, 5-Water seepage points in the roadway, 6-Water seepage points in the pit.

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Table 1 The analysis results for water samples in the study area (all hydrochemical compositions are in units of mg/L except for pH).

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