Folco L.; Bland P.A.; D’Orazio M.; Franchi I.A.; Kelley S.P.; Rocchi S.(2004)
DaG 896 is an olivine-rich microporphyritic rock of komatiitic composition. Both the olivine composition (Fa17.5±2.1, [Mn/Mg] = 0.0061) and the bulk oxygen isotopic composition (δ O = +2.55, δ O = +3.50) indicate that DaG ...
Pyroxenes of pigeonitic and augitic bulk compositions in H3-4 chondritic meteorites commonly exhibit sigmoidal precipitates, rather than the elsewhere common lamellar associations. Most often, submicrometric sigmoids with ...