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Uranium series dating of Allan Hills iceUranium-238 decay series nuclides dissolved in Antarctic ice samples were measured in areas of both high and low concentrations of volcanic glass shards. Ice from the Allan Hills site (high shard content) had high Ra-226, Th-230 and U-234 activities but similarly low U-238 activities in comparison with Antarctic ice samples without shards. The Ra-226, Th-230 and U-234 excesses were found to be proportional to the shard content, while the U-238 decay series results were consistent with the assumption that alpha decay products recoiled into the ice from the shards. Through this method of uranium series dating, it was learned that the Allen Hills Cul de Sac ice is approximately 325,000 years old.
Document ID
19860049995
Document Type
Reprint (Version printed in journal)
Authors
Fireman, E. L.
(Smithsonian Astrophysical Observatory Cambridge, MA, United States)
Date Acquired
August 12, 2013
Publication Date
March 30, 1986
Publication Information
Publication: Journal of Geophysical Research
Volume: 91
ISSN: 0148-0227
Subject Category
Geophysics
Accession Number
86A34733
Funding Number(s)
CONTRACT_GRANT: NSF DPP-82-17831
CONTRACT_GRANT: NAG9-42
Distribution Limits
Public
Copyright
Other

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