Volume relaxation of compacted SiO2 glass: a model for the conservation of natural diaplectic glasses

Details Volume relaxation of compacted SiO2 glass: a model for the conservation of natural diaplectic glasses Volume relaxation of compacted SiO2 glass: a model for the conservation of natural diaplectic glasses

Mar 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984e%26psl..67..433h&link_type=abstract

Earth and Planetary Science Letters, Volume 67, Issue 3, p. 433-438.

Physics

7

Scientific paper

Relaxation experiments on vitreous SiO2, densified at 900°C, 20 kbar to a permanent density of 2.36 g cm-3 yield an activation energy of 69 +/- 5 kcal mol-1 in the temperature range 700-800°C. The data can be used to estimate minimum cooling rates, maximum depositional temperatures or maximum thicknesses of shock-metamorphosed rocks containing diaplectic glasses, if relaxation of a glass densified under dynamic conditions is assumed to be similar to that of statically densified glass.

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