High-silica /greater than 60%/ lunar glasses in an Apollo 14 soil sample - Evidence for silicic lunar volcanism

Details High-silica /greater than 60%/ lunar glasses in an Apollo 14 soil sample - Evidence for silicic lunar volcanism High-silica /greater than 60%/ lunar glasses in an Apollo 14 soil sample - Evidence for silicic lunar volcanism

Nov 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976e%26psl..33...79g&link_type=abstract

Earth and Planetary Science Letters, vol. 33, Nov. 1976, p. 79-85. Research supported by the University of Delaware;

Other

Apollo 14 Flight, Geochemistry, Lunar Soil, Silica Glass, Abundance, Chemical Composition, Crystal Structure, Electron Microscopy, Mineralogy, Petrology, Silicon Dioxide, Soil Science, Volcanology

Scientific paper

The major-element compositions of 93 low-specific-gravity (less than 2.60) high-silica (greater than 60%) glass particles from a sample of lunar fines (14259,20) were determined by electron microprobe analyses. The size, shape, abundance, mineralogy, and major-element composition of more than 60% of the high-silica glasses is consistent with their being fragments of interstitial glass from mare basalts. However, one group of 30 glasses with between 72% and 78% SiO2 and an average of approximately 2.6% FeO can be distinguished from other high-silica glasses both chemically and petrographically. Glass particles with this composition do not contain crystalline inclusions and are fairly homogeneous not only within a single particle but also from particle to particle. The chemistry and petrology of these glasses suggest that they are not fragments of interstitial glass or shock-melted particles from a 'granitic' source rock. Rather, the homogeneity and lack of crystalline inclusions suggest that this group of high-silica glasses was the product of lunar acidic volcanism.

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