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Studies of lunar regolith dynamics using measurements of cosmogenic radionuclides in lunar rocks, soils and coresThe present investigation is concerned with two types of measurements. The first deals with the use of Al-26 to define regolith gardening processes which have occurred in the upper portion of the lunar cores that were collected both by the deep drilling and drive tube operations. The second portion of the study involves the use of Mn-53 and Al-26 concentrations to determine the surface exposure histories of individual rocks over the past ten million years. It is found that during the past two million years, 15011 has had a history of simple gardening with an accumulation rate of 2 cm/m.y. The Apollo 15 Station 2 boulder appears to have been in place for about five million years. The 'shadowed' soil (75237) shows a shielding effect of about 40%. The Apollo 16 Station 9 boulder appears to have been in place for about four million years and thus is apparently not related to the South Ray Crater event.
Document ID
19820048175
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Fruchter, J. S.
(Battelle Pacific Northwest Labs. Richland, WA, United States)
Reeves, J. H.
(Battelle Pacific Northwest Labs. Richland, WA, United States)
Evans, J. C.
(Battelle Pacific Northwest Labs. Richland, WA, United States)
Perkins, R. W.
(Battelle Pacific Northwest Laboratories Richland, WA, United States)
Date Acquired
August 10, 2013
Publication Date
January 1, 1982
Subject Category
Lunar And Planetary Exploration
Meeting Information
Meeting: Lunar and Planetary Science Conference
Location: Houston, TX
Start Date: March 16, 1981
End Date: March 20, 1981
Accession Number
82A31710
Funding Number(s)
CONTRACT_GRANT: NAS9-11712
Distribution Limits
Public
Copyright
Other

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