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Phase chemistry of Apollo 14 soil sample 14259Optical, X-ray-diffraction and electron-microprobe techniques were used to investigate 0.26 gm of Apollo 14 soil sample 14259. Major element microprobe analyses were made of 470 mineral grains and 388 glass grains. The mineral abundances in the soil are 45% plagioclase, 41% pyroxene, 7% olivine, 3% oxides, 2% K-feldspar; 1% nickel-iron, and less than 1% troilite. The glasses have a wide range of compositions but preferred values are evident and are interpreted as representative of rock types contributing to the soil at the Fra Mauro site. Eleven per cent of the glasses have compositions like those of mare basalts or mare soils and are believed to be mare-derived. Eighty-six per cent of the glasses are equivalent in composition to basalts that have higher Al, and lower Ca/Al and Fe/Mg ratios than mare basalts. The most abundant compositional type is named Fra Mauro basaltic glass and is subdivided into three related types. The other major glass type in the soil corresponds in composition to anorthositic gabbro.
Document ID
19750039453
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Aitken, F. K.
Anderson, D. H.
Bass, M. N.
Brown, R. W.
(NASA Johnson Space Center Houston, Tex.; Lockheed Electronics Co., Inc., Plainfield, N.J., United States)
Butler, P., Jr.
Heiken, G.
Jakes, P.
(NASA Johnson Space Center; Lunar Science Institute Houston, Tex., United States)
Reid, A. M.
Ridley, W. I.
Takeda, H.
(NASA Johnson Space Center Houston, Tex., United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1974
Publication Information
Publication: Modern Geology
Volume: 5
Subject Category
Lunar And Planetary Exploration
Accession Number
75A23525
Funding Number(s)
CONTRACT_GRANT: NSR-09-051-001
Distribution Limits
Public
Copyright
Other

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