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Deuterium in carbonaceous chondritesHydrogen 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.
Document ID
19800038775
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Kolodny, Y.
(California, University Los Angeles, Calif.; Jerusalem, Hebrew University, Jerusalem, Israel)
Kerridge, J. F.
(California Univ. Los Angeles, CA, United States)
Kaplan, I. R.
(California, University Los Angeles, Calif., United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1980
Publication Information
Publication: Earth and Planetary Science Letters
Volume: 46
Issue: 2, Ja
Subject Category
Lunar And Planetary Exploration
Accession Number
80A22945
Funding Number(s)
CONTRACT_GRANT: NGR-05-007-289
Distribution Limits
Public
Copyright
Other

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