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Ar-39/Ar-40 and Space Exposure Ages of the Unique Portales Valley H-ChondriteThe space exposure age of the unique Portales Valley H-chondrite is approx. 40-45 Myr. The 39 Ar-40 Ar ages of two samples are 4.477 +/- 0.016 and 4.46 +/- 0.02 Ga and show no evidence of more recent disturbance, in contrast to previous radiometric determinations Additional information is contained in the original extended abstract..
Document ID
20010045209
Document Type
Conference Paper
Authors
Garrison, D. H.
(NASA Johnson Space Center Houston, TX United States)
Bogard, D. D.
(Lockheed Martin Corp. Houston, TX United States)
Date Acquired
August 20, 2013
Publication Date
January 1, 2001
Publication Information
Publication: Lunar and Planetary Science XXXII
Subject Category
Lunar And Planetary Science And Exploration
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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