title: A new source of basaltic meteorites inferred from Northwest Africa 011.
abstract: Eucrites are a class of basaltic meteorites that share common mineralogical, isotopic, and chemical properties and are thought to have been derived from the same parent body, possibly asteroid 4 Vesta. The texture, mineralogy, and noble gas data of the recently recovered meteorite, Northwest Africa (NWA) 011, are similar to those of basaltic eucrites. However, the oxygen isotopic composition of NWA011 is different from that of other eucrites, indicating that NWA011 may be derived from a different parent body. The presence of basaltic meteorites with variable oxygen isotopic composition suggests the occurrence of multiple basaltic meteorite parent bodies, perhaps similar to 4 Vesta, in the early solar system.
authors.affiliation: Antarctic Meteorite Research Center, National Institute of Polar Research, Tokyo 173-8515, Japan. yamaguch@nipr.ac.jp
authors.forename: Akira
authors.initials: A
authors.lastname: Yamaguchi
authors.forename: Robert N
authors.initials: RN
authors.lastname: Clayton
authors.forename: Toshiko K
authors.initials: TK
authors.lastname: Mayeda
authors.forename: Mitsuru
authors.initials: M
authors.lastname: Ebihara
authors.forename: Yasuji
authors.initials: Y
authors.lastname: Oura
authors.forename: Yayoi N
authors.initials: YN
authors.lastname: Miura
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Haramura
authors.forename: Keiji
authors.initials: K
authors.lastname: Misawa
authors.forename: Hideyasu
authors.initials: H
authors.lastname: Kojima
authors.forename: Keisuke
authors.initials: K
authors.lastname: Nagao
mesh_terms: D000349:Africa; D003359:Cosmic Radiation; D019110:Meteoroids; D008903:Minerals / Q000032:analysis*; D018543:Minor Planets; D010103:Oxygen Isotopes / Q000032:analysis*; D017640:Silicates / Q000032:analysis*; D014131:Trace Elements / Q000032:analysis
chemical_list: D008903:Minerals; D010103:Oxygen Isotopes; D017640:Silicates; D014131:Trace Elements; C060346:basalt