Table 3.
Chemical Composition of the Igneous Rocks Dredged in the Parece Vela Rift
( Shcheka et al., 1986 )

Sample N	Harzburgite	Lherzolite	Dolerite	Granophyre dolerite	Granophyre dolerite glass
SiO 2	39.08	40.11	47.79	48.59	51.68
TiO 2	0.02	0.03	1.06	2.05	1.76
Al 2 O 3	1.29	1.81	17.50	15.67	15.17
Fe 2 O 3	4.56	6.58	2.07	8.15
FeO	1.90	2.02	6.53	4.12	9.96
MnO	0.06	0.10	0.16	0.16	0.19
MgO	37.00	32.18	9.48	4.00	7.14
CaO	0.13	1.69	10.97	10.72	11.98
Na 2 O	0.19	0.47	2.79	3.50	2.09
K 2 O	0.06	0.08	0.11	0.56	0.34
P 2 O 5	0.13	0.19		0.34
H 2 O +	13.76	12.28	0.99	1.51
H 2 O --	0.95	1.52	0.17	0.38
Total	99.13	99.05	99.62	99.74	100.31
f=Fe/(Fe+Mg)	8.3	12.2	33.2	61.6	44.00
Ba	< 5	< 5	< 30	< 30
Cr	3600	3000	270	210
Ni	1300	1200	189	57
Rb	< 1	< 1	3	10
Zr	< 20	< 20	< 20	147

Explanatory Note   |   Geological Data Sets   |   Data Sets   |   Main Page