Sintering and hot pressing of Fra Mauro composition glass and the lithification of lunar breccias

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ID: 297925
1973
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Abstract
It is proposed that Apollo 14 type breccias lithify by sintering of particles of matrix glass under stress-free conditions. Meteorite impacts generate the heat necessary for sintering. Compacted angular particles of glass with the composition of an Apollo 14 rock were sintered experimentally. Loose clods of sub 37 micron grains form in several days at 700 C. Synthetic rocks, which texturally resemble the breccias, were produced at 795 C and above in 7.5 hours. Glass devitrified with increasing temperature. At 850 C, devitrification prevents much further densification of the synthetic breccias after 2 hours. Experiments compressing glass at 500 bars at 600 C produced dense vitreous masses which did not resemble lunar breccias. Confining pressure does not play a major role in lithifying the breccias. It is concluded that Apollo 14 type lunar breccias form at shallow depths at 800 C+ in a period of minutes to days.
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openalex_W2047927175 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors C. H. Simonds
Journal american journal of science
Year 1973
DOI
10.2475/ajs.273.5.428
URL
https://ajs.scholasticahq.com/article/59615.pdf
Keywords Keywords not found

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