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Ar-40/Ar-39 studies of lunar brecciasResults of argon dating of lunar breccias from Apollo 14, 15, and 16 samples are presented. Basic chronological information was obtained on samples of 14270, 15362, 15455, and 63335,3; these samples averaged about 4 billion years in age. 14301 and 14313 were never isotopically homogenized and therefore do not yield ages. However, trapped argon in these breccias consists of two components, with one component rich in Ar-40 and fractionating at low temperatures during stepwise heating experiments.
Document ID
19750055556
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Alexander, E. C., Jr.
Kahl, S. B. (California, University Berkeley, Calif., United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1974
Subject Category
Lunar And Planetary Exploration
Meeting Information
Meeting: Lunar Science Conference
Location: Houston, TX
Start Date: March 18, 1974
End Date: March 22, 1974
Accession Number
75A39628
Funding Number(s)
CONTRACT_GRANT: NGL-05-003-409
CONTRACT_GRANT: NGR-24-005-223
Distribution Limits
Public
Copyright
Other

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