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An experimental investigation of agglutinate melting mechanisms - Shocked mixtures of sodium and potassium feldsparsThe results of an experiment designed to test the validity of the model for agglutinate formation involving fusion of the finest fraction or F3 are reported. Impact glasses were formed from various mixes of orthoclase and albite powders, which were used as analogs for soils with chemically constrasting coarse and fine fractions. The results showed that the single most important factor displacing the composition of a small-scale impact melt from the bulk composition of the source regolith is the fractionated composition of the finest soil fraction. Volatile loss and the amount of melting, which in turn are determined by the degree of shock, are also important. As predicted by the model, the lower pressure melts are the most fractionated, and higher pressure is accompanied by increased melting causing glass compositions to approach the bulk. In general, the systematics predicted by the model are observed; the model appears to be valid.
Document ID
19860035322
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Simon, S. B.
(South Dakota School of Mines and Technology Rapid City, SD, United States)
Papike, J. J.
(South Dakota School of Mines and Technology Rapid City, United States)
Horz, F.
(NASA Johnson Space Center Houston, TX, United States)
See, T. H.
(Lockheed Engineering and Management Services Co., Inc. Houston, TX, United States)
Date Acquired
August 12, 2013
Publication Date
November 15, 1985
Publication Information
Publication: Journal of Geophysical Research, Supplement
Volume: 90
ISSN: 0148-0227
Subject Category
Lunar And Planetary Exploration
Accession Number
86A20060
Funding Number(s)
CONTRACT_GRANT: NAG9-22
Distribution Limits
Public
Copyright
Other

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