Mathematics – Logic
Scientific paper
Mar 1997
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28..379f&link_type=abstract
Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 379.
Mathematics
Logic
5
Mars (Planet), Oxygen Isotopes, Achondrites, Snc Meteorites, Planetary Composition, Oxygen 17, Laser Induced Fluorescence, Meteoritic Composition, Earth (Planet)
Scientific paper
The variation in the oxygen stable isotopic compositions displayed by different groups of achondritic meteorites, the Earth, the moon, and Mars is a function of isotopic heterogeneity in the solar nebula and subsequent post-accretional homogenization of any original heterogeneities during the geologically active phase of the parent bodies. Of particular importance is the difference in oxygen isotopic composition between planetary bodies, especially when it comes to recognizing which samples derive from a particular body. The only body other than the Earth from which samples are available for study is Mars (the SNC meteorites). An attempt is therefore made to define the difference in oxygen isotopic composition between Earth and Mars to the best level of accuracy possible. The SNC meteorites do show considerable variation, with their delta O-17 ranging from 0.16 to 0.38 per mil with a mean value of 0.28 per mil. To investigate this variation further, a laser fluorination technique is employed which allows results of higher precision than has previously been possible. Replicate analyses on all the SNC meteorites are performed, with the exception of LEW88516 and Y793605, but including the previously unanalyzed Governador Valadares. A summary of these results is shown.
Franchi Ian A.
Pillinger Colin T.
Sexton Arabelle S.
Wright Ian P.
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