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Nature of the carbon and sulfur phases and inorganic gases in the Kenna ureiliteAbundances of carbon and sulfur in the Kenna ureilite are 2.219 plus or minus 0.060 wt. % C and 0.179 plus or minus 0.008 wt. % S. Secondary carbonates resulting from terrestrial weathering account for 0.25 plus or minus 0.02 wt. % C. No hydrocarbons were detected during gas release measurements. Most of the carbon is in graphite, diamond, or lonsdaleite. The sample of Kenna contained 0.95 plus or minus 0.05 wt.% H2O. Total carbon and sulfur measurements were made on three additional ureilites: Havero, Dingo Pup Donga, and North Haig. Ureilite carbon abundances are similar to those of C-2 chondrites, whereas sulfur abundances are a factor of 10 less than C-2 chondrites and ordinary chondrites. The elemental abundances, ratios, and phases present in the ureilites rule out a direct genetic relationship between the ureilites and the carbonaceous chondrites.
Document ID
19770031213
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Gibson, E. K., Jr.
(NASA Johnson Space Center Geochemistry Branch, Houston, Tex., United States)
Date Acquired
August 9, 2013
Publication Date
December 1, 1976
Publication Information
Publication: Geochimica et Cosmochimica Acta
Volume: 40
Subject Category
Lunar And Planetary Exploration
Accession Number
77A14065
Distribution Limits
Public
Copyright
Other

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