Computer Science
Scientific paper
Aug 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981gecoa..45.1267g&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 45, Aug. 1981, p. 1267-1279. Research supported by the Field Museum of Natural History
Computer Science
6
Achondrites, Basalt, Chemical Analysis, Meteoritic Composition, Mineralogy, Pyroxenes, Antarctic Regions, Electron Spectroscopy, Isotopes, Neutron Activation Analysis, Oxygen, Petrography, Trace Elements, Major Elements, Concentrations, Irradiation, Howardites, Mineralogy, Moama Meteorite, Serra De Mage Meteorite, Moore County Meteorite, Data, Polymict Breccias, Meteorites, Antarctic Meteorites, Alha76005, Grains, Allan Hills Meteorites, Eucrites, Achondrites, Trace Elements, Matrix, Composition, Clasts, Te
Scientific paper
ALHA 76005 is a basaltic achondrite containing few, if any, orthopyroxenes. Its bulk major and trace element composition is like that of a non-cumulate eucrite, and unlike that of a howardite. It contains a variety of igneous clasts which differ in their textures, pyroxene/plagioclase ratios and pyroxene and plagioclase compositions. One clast, No. 4, was found to have the REE pattern of a cumulate eucrite and an oxygen isotopic composition different from that of the bulk meteorite. Both the chemical and oxygen isotopic composition of clast No. 4 suggest that it was derived from a source different from its host. These observations lead to the conclusion that ALHA 76005 is a polymict eucrite.
Davis Aileen M.
Grossman Lawrence
MacPherson Glenn J.
Olsen Edward
Tanaka Toshiaki
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