Sub-continental lithospheric mantle beneath the Adamawa volcanic area (Cameroon Volcanic Line): inference from lavas and hosted mantle xenoliths from Bini Warack, NE-Ngaoundéré, Cameroon (Central Africa)

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Table 1

(continued).

Rock type		Basanite							Latite
Sample		SOT22			HOL32	BJM59A
Analyse	C6	C6	C6	C6	C6	C1(m)	C3(c)	C3(c)	C3(b)	C4-(m)	(C5)	C5(m)
SiO₂	52.87	52.70	52.29	51.08	51.50	56.81	61.01	60.46	56.38	55.86	54.70	55.19
TiO₂	0.39	0.16	0.16	0.14	0.10	0.06	0.00	0.00	0.08	0.05	0.07	0.12
Al₂O₃	24.17	29.46	29.04	30.21	30.50	26.39	24.22	24.09	26.26	27.08	27.92	27.51
FeO	1.11	0.62	0.61	0.60	0.50	0.58	0.21	0.20	0.52	0.54	0.45	0.59
CaO	8.72	12.52	12.68	13.86	13.87	9.34	6.42	6.53	9.16	9.92	11.05	10.55
Na₂O	5.56	4.19	4.01	3.41	3.68	5.97	7.89	7.88	6.03	5.49	5.00	5.24
K₂O	2.56	0.32	0.36	0.34	0.33	0.90	0.56	0.60	0.74	0.63	0.56	0.73
BaO	0.31	0.02	0.04	0.04	-	-	-	0.01	0.00	-	-	-
MnO	0.00	0.03	0.04	0.00	0.03	0.00	0.02	0.01	0.04	0.01	0.00	0.00
MgO	0.12	0.06	0.08	0.22	0.09	0.06	0.00	0.01	0.09	0.05	0.12	0.05
NiO	0.00	0.00	0.00	0.00	0.00	0.02	0.00	0.05	0.05	0.00	0.00	0.00
F	0.05	0.00	0.00	0.19	-	-	-	0.08	0.08	-	-	-
Total	95.96	100.08	99.31	100.09	100.63	100.14	100.33	99.92	99.42	99.63	99.87	99.98
Si	10.16	9.57	9.595	9.36	9.36	10.26	10.85	10.83	10.26	10.13	9.93	10.00
Ti	0.06	0.02	0.022	0.02	0.01	0.01	0.00	0.00	0.01	0.01	0.01	0.02
Al	5.48	6.32	6.280	6.52	6.53	5.62	5.08	5.08	5.63	5.79	5.97	5.88
Fe²⁺	0.18	0.09	0.094	0.09	0.08	0.09	0.03	0.03	0.08	0.08	0.07	0.09
Ca	1.80	2.44	2.493	2.72	2.70	1.81	1.22	1.25	1.79	1.93	2.15	2.05
Na	2.07	1.48	1.427	1.21	1.30	2.09	2.72	2.74	2.13	1.93	1.76	1.84
K	0.63	0.07	0.084	0.08	0.08	0.21	0.13	0.14	0.17	0.15	0.13	0.17
Ba	0.02	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
SUM	20.39	20.01	20.00	20.01	20.05	20.07	20.03	20.07	20.06	20.01	20.02	20.05
An	39.95	61.12	62.26	67.82	66.29	44.03	30.05	30.37	43.72	48.14	53.22	50.46
Ab	46.09	37.02	35.63	30.20	31.83	50.92	66.83	66.31	52.08	48.22	43.57	45.37
Or	13.96	1.86	2.10	1.98	1.88	5.05	3.12	3.32	4.21	3.64	3.21	4.16

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