Table 2.

Composition of spinel peridotite (McDonough 1990) and for comparison Hawaiian pyrolite (Green & Falloon 1998)

Spinel peridotiteHawaiian pyrolite
SiO244.045.2
TiO20.090.71
Al2O32.270.84
FeO8.433.54
MgO41.437.5
CaO2.153.08
Na2O0.240.57