Impact Metamorphism of Lunar Surface Materials

Details Impact Metamorphism of Lunar Surface Materials Impact Metamorphism of Lunar Surface Materials

Jan 1970

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970sci...167..671q&link_type=abstract

Science, Volume 167, Issue 3918, pp. 671-672

Computer Science

Scientific paper

Silicate grains from Tranquillity Base have shock-induced features ranging from internal fragmentation through complete disruption of the lattice to thermal melting. Half the crystalline grains with diameters less than 125 micrometers have features of shock equivalent to those produced in the laboratory at pressures greater than about 40 kilobars. One quarter have features indicative of pressures greater than 90 kilobars. These properties together with great quantities of melt glass and aluminum-26 in the fine-grained material are indicative of repeated shock-loading by meteoritic bombardment over long periods of time.

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