Table 3 Ash yield (%, db), major and minor (wt %, db), and trace elements (μg/g, db) concentrations in the coals from the Fengfeng–Handan Coalfield (Dai and Ren, 2007¹⁰) and related ratios.

From: Parameters of geochemical effect equation for lanthanides and their geochemical significance for a series of metamorphic coals

Element	No. 1	No. 2	No. 3	No. 4	No. 5	No. 6	No. 7	No. 8	No. 9	No. 10	No. 11	No. 12
Ash yield	18.5	16.2	19.5	16.1	18.6	20.6	22.4	19.7	23.4	26.6	30.3	22.1
Al₂O₃	6.49	5.24	7.21	5.53	6.85	6.86	7.21	12.57	6.93	8.22	5.48	5.47
SiO₂	13.25	11.85	15.86	11.25	13.54	15.47	14.86	21.22	15.25	18.45	14.06	12.05
MgO	0.26	0.15	0.13	0.44	0.28	0.44	0.68	1.52	1.22	0.98	1.38	1.41
CaO	0.89	0.78	1.65	0.68	1.81	0.48	1.21	10.36	4.25	1.92	6.65	8.54
K₂O	0.27	0.28	0.05	0.46	0.05	0.26	0.18	0.10	0.18	0.28	0.05	0.25
Na₂O	0.09	0.11	0.43	0.19	0.16	0.08	0.09	0.07	0.10	0.05	0.23	0.35
TiO₂	0.34	0.24	0.14	0.52	0.59	0.49	0.32	0.78	0.33	0.22	0.70	0.68
Fe₂O₃	0.60	0.65	0.78	0.54	0.72	0.89	0.84	1.25	1.84	2.65	8.56	1.48
MnO₂	0.09	0.03	0.02	0.02	0.01	0.10	0.06	0.17	0.15	0.10	0.17	0.20
P₂O₅	0.03	0.03	0.03	0.41	0.02	0.02	0.51	0.83	0.16	0.22	0.76	0.49
Al	3.435	2.774	3.816	2.927	3.626	3.631	3.816	6.6545	3.668	4.3516	2.9011	2.8958
Si	6.188	5.534	7.407	5.254	6.323	7.224	6.94	9.91	7.122	8.616	6.566	5.627
Mg	0.157	0.09	0.078	0.265	0.169	0.265	0.41	0.917	0.736	0.591	0.832	0.85
Ca	0.636	0.558	1.18	0.486	1.294	0.343	0.865	7.407	3.039	1.373	4.755	6.106
K	0.224	0.232	0.042	0.382	0.042	0.216	0.149	0.083	0.149	0.232	0.042	0.208
Na	0.067	0.082	0.319	0.141	0.119	0.059	0.067	0.052	0.074	0.037	0.171	0.26
Ti	0.204	0.144	0.084	0.311	0.353	0.294	0.192	0.467	0.198	0.132	0.419	0.407
Mn	0.057	0.019	0.013	0.013	0.006	0.063	0.038	0.107	0.095	0.063	0.107	0.126
Fe	0.419	0.454	0.545	0.377	0.503	0.622	0.587	0.874	1.286	1.852	5.983	1.035
P	0.013	0.013	0.013	0.179	0.009	0.009	0.222	0.362	0.07	0.096	0.331	0.214
As	2.31	1.25	0.55	3.51	1.59	0.79	2.46	12.88	7.45	42.23	48.41	18.38
Ba	145.2	131.3	123.6	178.5	192.5	144.3	184.7	178.4	254.6	115.8	89.4	150.3
B	24.5	27.8	32.4	29.8	32.4	28.7	27.6	26.9	61.5	66.9	78.6	57.5
Be	2.11	1.67	1.22	2.34	2.55	2.57	1.74	0.65	1.80	0.88	1.52	2.20
Bi	0.29	0.18	0.13	0.43	1.04	0.24	0.49	0.99	0.17	0.45	0.20	0.41
Br	9.85	10.54	11.50	10.70	6.80	12.50	15.80	95.40	73.20	112.80	98.50	70.60
Ce	33.11	33.08	23.63	30.60	26.65	32.35	29.83	43.54	26.88	34.37	39.14	26.81
Cl	96.9	100.7	114.5	87.6	124.4	214.9	563.2	756.3	869.7	1,220.0	720.4	685.5
Co	2.80	2.45	2.30	1.50	1.00	3.50	2.80	4.20	14.60	29.20	33.70	18.90
Cr	18.40	10.55	19.10	9.60	15.80	18.70	21.50	10.50	14.70	13.30	19.10	15.40
Cs	0.12	0.22	0.85	0.14	0.91	0.54	0.25	0.11	0.09	0.04	0.18	0.09
Cu	8.54	11.58	26.50	15.40	9.87	14.60	14.70	11.20	65.40	121.50	181.40	90.80
Dy	2.48	2.45	1.52	2.75	1.51	1.80	1.87	2.27	2.28	1.61	2.73	1.42
Er	1.36	1.33	0.86	1.60	0.88	1.12	1.07	1.30	1.42	0.93	1.57	0.84
Eu	0.69	0.64	0.38	0.62	0.38	0.54	0.51	0.55	0.50	0.46	0.57	0.36
F	85.9	90.7	98.5	86.4	62.2	78.2	101.4	125.2	652.8	423.5	1,212.1	885.6
Ga	12.50	13.46	14.80	5.64	8.37	9.81	11.50	12.78	15.44	3.50	9.80	8.34
Gd	2.70	2.67	1.63	2.86	1.68	2.04	2.05	2.56	2.45	1.95	2.86	1.74
Hf	1.56	1.52	1.23	0.88	1.56	1.08	2.24	1.30	0.86	1.11	1.21	0.98
Hg	0.14	0.08	0.09	0.12	0.05	0.09	0.07	0.09	0.55	0.59	1.64	1.32
Ho	0.50	0.47	0.31	0.55	0.31	0.38	0.37	0.45	0.48	0.33	0.53	0.30
La	17.23	17.20	12.98	15.52	14.55	17.89	15.96	24.37	13.58	20.68	19.09	13.88
Lu	0.20	0.18	0.15	0.25	0.14	0.20	0.18	0.20	0.24	0.15	0.24	0.15
Mo	3.41	2.89	3.50	1.36	4.30	2.20	2.42	2.90	2.88	2.41	2.11	1.25
Nb	18.54	18.51	17.65	5.98	12.65	8.74	14.56	10.25	9.62	15.89	14.75	20.34
Nd	14.12	14.09	9.43	13.90	9.99	12.19	11.83	14.66	11.88	11.04	14.87	10.51
Ni	3.15	2.78	1.40	2.32	7.75	5.40	6.63	21.66	20.77	56.89	74.59	28.65
Pb	25.64	22.12	21.53	8.59	21.28	15.96	13.51	18.29	25.44	70.24	86.58	57.85
Pr	3.77	3.74	2.59	3.64	2.79	3.42	3.29	4.36	3.04	3.29	4.20	2.84
Rb	1.54	1.51	1.89	1.11	1.04	1.28	2.15	1.54	2.66	24.50	18.90	8.08
Sb	6.42	6.33	8.95	5.48	3.55	2.54	3.60	1.11	0.18	0.76	0.89	0.47
Sc	5.58	5.21	5.22	6.45	6.32	6.85	3.21	3.96	3.47	4.14	3.12	4.15
Se	3.58	3.44	2.12	1.25	2.56	2.76	1.91	1.93	1.05	0.94	11.85	0.68
Sm	2.82	2.79	1.71	2.94	1.75	2.13	2.15	2.59	2.35	1.83	2.97	1.74
Sn	7.85	8.95	11.23	8.45	10.68	12.04	8.37	11.21	6.34	8.67	13.09	6.52
Sr	187.5	100.5	199.3	168.0	288.4	197.1	236.1	220.5	589.5	1,024.5	1732.4	2,422.0
Ta	0.32	0.28	0.26	0.15	0.83	0.54	0.15	0.32	0.11	0.20	0.52	0.23
Tb	0.41	0.38	0.26	0.47	0.26	0.31	0.32	0.39	0.40	0.28	0.44	0.25
Th	9.70	10.20	11.66	3.65	10.25	18.40	3.42	10.07	3.10	8.66	6.70	6.71
Tm	0.20	0.17	0.14	0.24	0.14	0.17	0.16	0.19	0.21	0.14	0.24	0.13
U	1.54	1.25	0.75	1.21	1.25	2.38	1.85	8.50	25.51	32.48	24.32	21.59
V	55.56	54.88	93.65	52.87	65.82	54.09	20.75	28.54	18.49	16.58	15.44	22.36
W	1.57	1.04	1.94	0.89	1.15	2.22	0.59	1.76	2.40	2.36	2.41	2.54
Y	12.53	12.48	14.34	9.96	12.66	11.22	7.85	7.40	8.00	5.66	15.27	6.89
Yb	1.22	1.19	0.83	1.55	0.82	1.08	1.03	1.18	1.39	0.82	1.55	0.80
Zn	25.63	32.62	35.21	45.71	35.42	17.89	34.57	138.20	88.45	70.62	121.40	150.50
Zr	305.8	251.6	154.8	265.4	302.5	127.2	170.0	75.4	105.8	92.8	131.0	112.4
Th/U	6.298	8.16	15.54	3.016	8.2	7.731	1.848	1.1847	0.121	0.2666	0.2754	0.3107
Sr/Ba	1.291	0.765	1.612	0.941	1.498	1.365	1.278	12.359	2.315	8.8471	19.378	16.114
Th/Co	3.464	4.163	5.069	2.433	10.25	5.257	1.221	2.3976	0.212	0.2965	0.1988	0.3550
Zr/Hf	196.0	165.5	125.8	301.5	193.9	117.7	75.89	58	123.0	83.603	108.26	114.69
Zr/Nb	16.49	13.59	8.770	44.38	23.91	14.55	11.67	7.3560	10.99	5.8401	8.8813	5.5260
Yb/La	0.070	0.069	0.063	0.099	0.056	0.060	0.064	0.0484	0.102	0.0396	0.0811	0.0576
Nb/Ta	57.93	66.10	67.88	39.86	15.24	16.18	97.06	32.031	87.45	79.45	28.365	88.434
(SiO + Al₂O₃)/(Fe₂O₃ + CaO + MgO)	11.28	10.81	9.012	10.10	7.256	12.34	8.084	2.573	3.034	4.805	1.1779	1.5328

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Table 3 Ash yield (%, db), major and minor (wt %, db), and trace elements (μg/g, db) concentrations in the coals from the Fengfeng–Handan Coalfield (Dai and Ren, 2007¹⁰) and related ratios.

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