Computer Science
Scientific paper
Jan 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980e%26psl..46..149k&link_type=abstract
Earth and Planetary Science Letters, vol. 46, no. 2, Jan. 1980, p. 149-158.
Computer Science
31
Carbonaceous Chondrites, Deuterium, Meteoritic Composition, Planetary Evolution, Chemical Evolution, Organic Compounds, Oxidation, Oxygen Plasma, Silicates, Temperature Effects, Meteorites, Carbonaceous Chondrites, Deuterium, Hydrogen, Isotopes, Oxidation, Enrichment, Silicates, Orgueil Meteorite, Ivuna Meteorite, Renazzo Meteorite, Temperatures, Isotopic Ratios, Deuterium/Hydrogen, C Chondrites, Mokoia Meteorite, Murray Meteorite, Chainpur Meteorite, Experiments, Procedure, Murchison Meteorite, Mighei Mete
Scientific paper
Hydrogen isotopic compositions in seven carbonaceous chondrites lie in the range -70 to +771 per thousand relative to standard mean ocean water. These values decrease, to a range from -145 to +219 per thousand, after low-temperature oxidation in an oxygen plasma. Deuterium enrichment is therefore concentrated in the organic matter, the hydrous silicates probably lying close to the terrestrial range for such material. Calculated values for delta D of the organic fraction are +450 per thousand for Orgueil and Ivuna and up to +1600 per thousand for Renazzo. These enrichments, at least for Orgueil and Ivuna, suggest equilibration with protosolar hydrogen at very low temperatures. Assuming a value of 2.5 x 10 to the -5th for the protosolar D/H ratio, nominal equilibration temperatures of 230 K for silicates and 180 K for organic matter may be derived.
Kaplan Isaac R.
Kerridge John F.
Kolodny Yehoshua
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