Physics
Scientific paper
Jun 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986gecoa..50..979c&link_type=abstract
(Lunar and Planetary Institute, NASA, American Geophysical Union, et al., Lunar and Planetary Science Conference, 16th, Houston,
Physics
2
Achondrites, Meteoritic Composition, Mineralogy, Oxygen Isotopes, Chemical Evolution, Chemical Fractionation, Solar System, Meteorites, Stony Meteorites, Achondrites, Shergotty, Samples, Meteorite, Oxygen, Isotopes, Compostion, Abundance, Fractionation, Equilibration, Temperture, Snc Meteorites, Shergottites, Nakhlites, Chassigny, Origin, Parent Bodies, Procedure, Laboratory Studies, Source, Mineralogy
Scientific paper
Oxygen isotopic fractionation among the major mineral phases of Shergotty corresponds to a temperature of last equilibration of about 1100°C. There are no large departures from equilibrium due to metamorphism, shock, or retrograde exchange. On the oxygen three-isotope plot, the shergottites, nakhlites, and chassignites form a unique group, consistent with their having originated in a common parent body. Too little is known about the spatial and temporal variation of oxygen isotope abundances in the early solar system to allow identification of the SNC meteorites with any particular parent body.
Clayton Robert N.
Mayeda Toshiko K.
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