Archaean aluminous ultrabasic rocks with primary igneous textures from the Fiskenaesset region, southern West Greenland

Details Archaean aluminous ultrabasic rocks with primary igneous textures from the Fiskenaesset region, southern West Greenland Archaean aluminous ultrabasic rocks with primary igneous textures from the Fiskenaesset region, southern West Greenland

Aug 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977e%26psl..36..157f&link_type=abstract

Earth and Planetary Science Letters, Volume 36, Issue 1, p. 157-167.

Physics

1

Scientific paper

A series of spinel-dunites and spinel-pyroxenites is described from the Archaean amphibolite facies terrain of West Greenland. They occur in a disrupted layered sequence with some units reaching pegmatitic proportions and including intergrowths of spinel + olivine and spinel + orthopyroxene. Rare instances of spinel + olivine overgrown by spinel + orthopyroxene are observed which reveal the way-up of the sequence. The textures described are preserved as boudins within metamorphically layered and recrystallised spinel-olivine-orthopyroxene rocks and they clearly represent undeformed primary igneous assemblages.

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