Other
Scientific paper
May 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974modge...5....1a&link_type=abstract
Modern Geology, vol. 5, 1974, p. 1-13.
Other
Apollo 14 Flight, Chemical Analysis, Lunar Rocks, Lunar Soil, Minerals, Abundance, Electron Probes, Gabbro, Glass, Microanalysis, Phase Diagrams, X Ray Analysis
Scientific paper
Optical, 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.
Aitken F. K.
Anderson Daniel H.
Bass Manuel N.
Brown Warren R.
Butler Patrick Jr.
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