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Igneous rock associations 10. Komatiites
SUMMARY Komatiites are ultramafic volcanic rocks that occur mainly in Archean and Paleoproterozoic greenstone belts. These olivine-rich rocks are assumed to have crystallized from magmas that have about 28-30 wt% MgO. They are characterized by spinifex texture--platy or skeletal crystals of olivine set in a glassy matrix. Chemically, komatiites...
Tags: Arndt, Ashwal, C., Campbell, Fig, G., Ga, Grove, J., Journal, L., M., Ma, Oxford University Press, S., Viljoen
Research articles 2008-03-01
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