The Cumulate Eucrite Serra de Mage: New INAA Data and the Composition of its Parent Magma

Details The Cumulate Eucrite Serra de Mage: New INAA Data and the Composition of its Parent Magma The Cumulate Eucrite Serra de Mage: New INAA Data and the Composition of its Parent Magma

Jan 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996eiaf.conf...33t&link_type=abstract

Workshop on Evolution of Igneous Asteroids: Focus on Vesta and the HED Meterorites, p. 33

Other

Basalt, Feldspars, Magma, Pyroxenes, Trace Elements, Achondrites, Meteoritic Composition, Minerals, Abundance, Neutron Activation Analysis, Crystallization

Scientific paper

Trace-element abundances have been obtained by Instrumental Neutron Activation Analysis (INAA) for a USNM sample of the cumulate eucrite Serra de Mage. The USNM sample has more Al and Eu and less Mg, Fe, and Sc than does only other completely analyzed sample [2]. Compositions of both samples are consistent with being cumulates from basalt magma like the Nuevo Laredo eucrite, but with different proportions of magma, pigeonite, and plagioclase: 3.5%, 37.5%, and 59% respectively for the former, and 11%, 52.5%, and 36.5% for the latter. Thus, there is no need to invoke unusual magmas or Complex petrogenetic processes in the formation of Serra de Mage.

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