Other
Scientific paper
Jun 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977e%26psl..35..331m&link_type=abstract
Earth and Planetary Science Letters, vol. 35, no. 2, June 1977, p. 331-346.
Other
16
Abundance, Achondrites, Meteoritic Composition, Minerals, Chemical Elements, Olivine, Pyroxenes, Rare Earth Elements, Rocks, Trace Elements
Scientific paper
Major, minor, and trace element abundances were determined in seven Angra dos Reis samples, which included whole rocks, fassaite (clinopyroxene), olivine, and whitlockite separates, via sequential instrumental neutron activation analysis. The rare earth element abundance patterns and the trace element abundance patterns of this achondritic meteorite are discussed. A two-stage crystal-liquid fractionation model with source material containing olivine, orthopyroxene, and clinopyroxine is presented for the genesis of Angra dos Reis. Multilinear regression analysis was used to estimate possible composition and properties of the parent magmas. Angra dos Reis was compared with other achondrites, cumulate eucrites and nakhlites in particular. It is thought that the unique Angra dos Reis could not be related to those achondrites by crystal-liquid fractionation of the same parent body.
Ma Meng-Sen
Murali A. V.
Schmitt Roman A.
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