Distribution, Microfabric, and Geochemical Characteristics of Siliceous Rocks in Central Orogenic Belt, China: Implications for a Hydrothermal Sedimentation Model

Table 2

Major elements and related geochemical indices for siliceous rocks from the Bafangshan-Erlihe area.

NO.	Si/Al	MnO/TiO2	K2O/Na2O	SiO2/(K2O + N2O)	SiO2/Al2O3	Fe2O3/FeO	SiO2/MgO	Al/(Fe + Al + Mn)	Al/(Al + Fe)	Al2O3/(Al2O3 + Fe2O3)	Fe/Ti	(Fe + Mn)/Ti	Al2O3/TiO2
FE001	115.60	45.98	5.38	856.39	131.14	0.18	81.14	0.22	0.23	0.74	972.08	1031.45	324.94
FE002	34.85	0.96	19.62	149.10	39.54	0.11	115.79	0.58	0.59	0.96	22.09	23.32	36.54
FE003	125.68	7.17	8.62	649.03	142.58	0.09	55.23	0.13	0.13	0.72	250.88	260.14	42.64
FE004	34.02	1.72	19.62	126.38	38.60	0.07	39.94	0.24	0.24	0.88	78.29	80.51	28.63
FE005	354.65	78.52	8.77	1357.98	402.34	0.12	33.66	0.03	0.03	0.28	3503.66	3605.04	112.71
FE006	11.83	0.48	23.63	44.51	13.42	0.21	55.35	0.56	0.57	0.92	16.98	17.60	25.42
FE007	42.40	1.43	20.59	174.90	48.11	0.22	70.89	0.27	0.27	0.75	70.13	71.98	29.58
FE008	85.37	2.59	0.64	387.38	96.85	0.05	346.53	0.33	0.35	0.94	35.48	38.83	21.85
FB001	25.22	1.43	21.25	92.58	28.61	0.08	28.61	0.45	0.46	0.94	43.37	45.21	41.14
FB002	17.91	1.33	15.57	70.06	20.32	2.17	76.67	0.34	0.34	0.51	75.67	77.40	44.44
FB003	62.26	4.00	16.00	255.53	70.63	0.07	73.63	0.24	0.25	0.88	107.29	112.45	41.00
FB004	36.94	0.25	8.25	120.05	41.91	1.35	177.68	0.57	0.58	0.77	17.26	17.58	26.50
FB005	18.66	0.38	15.43	71.23	21.17	1.33	61.59	0.39	0.39	0.61	40.52	41.02	29.77
FB006	37.74	2.00	11.33	124.38	42.81	0.21	81.45	0.42	0.43	0.86	64.00	66.59	53.75
Aver.	54.27	5.28	13.81	269.67	61.56	0.44	136.70	0.36	0.37	0.82	132.05	138.87	56.20

∗∗Samples FB001 to FB006 from literature [1].