Ar-39 - Ar-40 Dating of Unusual Eucrite NWA-011: Is it from Vesta?Basaltic meteorite NWA-011 is similar to eucrites in many aspects, but its oxygen isotopic composition lies far off the oxygen fractionation line defined by eucrites. It was suggested that NWA011 may have derived from a different parent body from that of eucrites, which are thought to derive from the asteroid Vesta. Some other eucrites also show small anomalous oxygen compositions. This suggests that for all eucrites to derive from Vesta, it must be compositionally inhomogeneous. Some workers have speculated whether early, large impactors on Vesta might have contributed the anomalous oxygen.
Document ID
20040062422
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Bogard, D. D. (NASA Johnson Space Center Houston, TX, United States)
Garrison, D. H. (Lockheed Martin Corp. Houston, TX, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2004
Publication Information
Publication: Lunar and Planetary Science XXXV: Achondrite Mishmash