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Non-basaltic asteroidal magmatism during the earliest stages of solar system evolution: A view from Antarctic achondrites Graves Nunatak 06128 and 06129

Shearer, C.K.; Burger, P.V.; Neal, C.; Sharp, Z. D.; Spivak-Birndorf, L.; Borg, L.; Fernandes, V.A.; Papike, J.J.; Karner, J.; Wadhwa, M.; Gaffney, A.; Shafer, J.; Geissman, J.; Atudorei, N.-V.; Herd, C.; Weiss, B.P.; King, Penelope; Crowther, J.; Gilmour, J.


The recently recovered paired Antarctic achondrites Graves Nunatak 06128 and 06129 (GRA) are meteorites that represent unique high-temperature asteroidal processes that are identified in only a few other meteorites. The GRA meteorites contain high abundances of sodic plagioclase, relatively Fe-rich pyroxenes and olivine, abundant phosphates, and low temperature alteration. They represent products of very early planetesimal melting (4565.9 ± 0.3 Ma) of an unsampled geochemical reservoir from an...[Show more]

CollectionsANU Research Publications
Date published: 2010
Type: Journal article
Source: Geochimica et Cosmochimica Acta
DOI: 10.1016/j.gca.2009.10.029


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