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The age of the meteorite recovery surfaces of Roosevelt County, New Mexico, USAWe have obtained minimum age estimates for the sand units underlying the two largest meteorite deflation surfaces in Roosevelt County, New Mexico, USA, using thermoluminescence dating techniques. The dates obtained ranged from 53.5 (+/- 5.4) to 95.2 (+/- 9.5) ka, and must be considered lower limits for the terrestrial ages of the meteorites found within these specific deflation surfaces. These ages greatly exceed previous measurements from adjacent meteorite-producing deflation basins. We find that Roosevelt County meteorites are probably terrestrial contemporaries of the meteorites found at most accumulation zones in Antarctica. The apparent high meteorite accumulation rate reported for Roosevelt County by Zolensky et al. (1990) is incorrect, as it used an age of 16 ka for all Roosevelt County recovery surfaces. We conclude that the extreme variability of terrestrial ages of the Roosevelt County deflation surfaces effectively precludes their use for calculations of the meteorite accumulation rate at the Earth's surface.
Document ID
19930029974
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Zolensky, Michael E.
(NASA Johnson Space Center Houston, TX, United States)
Rendell, Helen M.
(Sussex Univ. Brighton, United Kingdom)
Wilson, Ivan
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Wells, Gordon L.
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Date Acquired
August 15, 2013
Publication Date
September 1, 1992
Publication Information
Publication: Meteoritics
Volume: 27
Issue: 4
ISSN: 0026-1114
Subject Category
Lunar And Planetary Exploration
Accession Number
93A13971
Distribution Limits
Public
Copyright
Other

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