Mineralogy and diagenetic impacts on chemical composition of Paleozoic mudrocks, southwestern Sinai, Egypt

Bulletin of the National Research Centre

Table 3 Average chemical composition (major components in wt.%) of Paleozoic mudrocks

Age			Fms.	S. No.	SiO₂	Al₂O₃	Fe₂O₃	MgO	CaO	Na₂O	K₂O	P₂O₅	SO₃⁻²	Cl⁻	L.O.I
Paleozoic	Late Paleozoic	Early Carboniferous	Magharet El Maiah	Min.	39.24	17.02	0.62	0.31	0.34	0.08	0.53	0.07	2.8	0.02	8.08
				Max.	67.40	17.13	0.70	0.50	10.00	0.65	1.12	0.18	17.42	0.24	12.44
				Average	56.67	17.08	0.65	0.35	3.92	0.34	0.83	0.11	8.20	0.11	10.20
			El Hashash	Average	69.68	24.00	0.38	0.20	0.38	0.06	0.44	0.09	0.06	0.01	3.67
	Early Paleozoic	Cambro-Ordovician	Adedia	Min.	51.86	18.26	1.17	1.82	0.49	0.50	4.49	0.13	0.04	2.35	5.19
				Max.	59.55	22.02	7.61	2.08	0.57	2.37	5.54	0.21	3.17	7.93	0.21
				Average	55.71	20.14	4.39	1.95	0.53	1.44	5.02	0.18	0.13	2.76	6.56
			Abu Hamata	Min.	48.69	17.82	5.29	1.54	0.56	0.13	5.31	0.24	0.06	0.05	4.03
				Max.	56.78	23.57	7.34	2.53	1.48	3.81	5.75	0.60	1.50	4.29	7.92
				Average	53.39	20.65	6.27	2.02	0.88	1.61	5.46	0.38	0.57	1.62	5.34