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Major element composition of Luna 20 glasses.Ten per cent of the 50 to 150-micron size fraction of Luna 20 soil is glass. A random suite of 270 of these glasses has been analyzed by electron microprobe techniques. The major glass type forms a strong cluster around a mean value corresponding to Highland basalt (anorthositic gabbro) with 70% normative feldspar. Minor glass groups have the compositions of mare basalts and of low-K Fra Mauro type basalts. The glass data indicate that Highland basalt is the major rock type in the highlands north of Mare Fecunditatis.
Document ID
19730032025
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Warner, J.
Reid, A. M.
(NASA Manned Spacecraft Center Houston, Tex., United States)
Ridley, W. I.
(Lunar Science Institute Houston, Tex., United States)
Brown, R. W.
(Lockheed Electronics Co., Inc. Houston, Tex., United States)
Date Acquired
August 7, 2013
Publication Date
December 1, 1972
Publication Information
Publication: Earth and Planetary Science Letters
Volume: 17
Subject Category
Chemistry
Accession Number
73A16827
Funding Number(s)
CONTRACT_GRANT: NSR-09-051-001
Distribution Limits
Public
Copyright
Other

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