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Solar wind and micrometeorite effects in the lunar regolithUsing available data from the literature, an outline is formulated for the major physical and chemical effects expected during solar-wind bombardment of the lunar regolith. In agreement with results of Auger and other analyses of the composition of lunar grain surfaces, this outline predicts that solar-wind sputtering will tend to clean exposed grain surfaces by ejecting material at velocities exceeding lunar escape velocity. Results are also discussed which show that Fe is partially reduced in the outer few 10 nm of grain surfaces and that this reduced Fe forms 10-nm-diameter metal spheres throughout the glass during agglutinate formation by micrometeorite impacts. These metal spheres give the agglutinates their distinctive optical and magnetic properties and are partially responsible for the decreasing albedo of the lunar surface with exposure age.
Document ID
19770046360
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Housley, R. M.
(Rockwell International Science Center Thousand Oaks, Calif., United States)
Date Acquired
August 8, 2013
Publication Date
March 31, 1977
Subject Category
Lunar And Planetary Exploration
Accession Number
77A29212
Funding Number(s)
CONTRACT_GRANT: NAS9-11539
Distribution Limits
Public
Copyright
Other

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