Correlations of (Delta)O-17 with Chemical Characteristics Among Chondrite GroupsDemonstration of mass-independent O isotopic variations in solar system materials was a seminal discovery of meteoritics. These variations were thought to reflect incomplete mixing of O from different nucleosynthesis sources. Since then, two non-nucleosynthetic causes have been suggested: (1) differential photodissociation of distinct isotopomers of CO, enriching nebular gas in chemically reactive heavy O, and (2) gas-phase molecular reactions producing mass-independent O isotopic exchange. Nebular processes caused chemical fractionations that are observed in chondrite bulk compositions. If nebular processes also produced mass-independent O isotopic variations, then these may correlate with chondrite bulk chemistry.
Document ID
20050202048
Acquisition Source
Headquarters
Document Type
Conference Paper
Authors
Mittlefehldt, D. W. (NASA Johnson Space Center Houston, TX, United States)
Date Acquired
August 23, 2013
Publication Date
January 1, 2005
Publication Information
Publication: Workshop on Oxygen in Asteroids and Meteorites