Shock-implanted noble gases. II - Additional experimental studies and recognition in naturally shocked terrestrial materials

Details Shock-implanted noble gases. II - Additional experimental studies and recognition in naturally shocked terrestrial materials Shock-implanted noble gases. II - Additional experimental studies and recognition in naturally shocked terrestrial materials

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989metic..24..113b&link_type=abstract

Meteoritics (ISSN 0026-1114), vol. 24, June 1989, p. 113-123.

Physics

10

Earth Surface, Planetary Atmospheres, Planetary Craters, Rare Gases, Shock Waves, Silicates, Gaseous Diffusion, Implantation, Mars Surface, Meteorites, Meteorites, Shock Effects, Rare Gases, Laboratory Studies, Experiments, Silicates, Implantation, Mineralogy, Diffusion, Samples, Terrestrial, Pressure, Wabar Crater, Saudi Arabia, Argon, Procedure, Porosity, Mars, Eet Meteorites, Eeta79001, Atmosphere, Antarctic Meteorites

Scientific paper

The process by which ambient gases can be implanted into silicates by shocks was investigated by analyzing the noble-gas content of several experimentally and naturally shocked silicate samples. The retentivity of shock-implanted gas during stepwise heating in the laboratory was defined in terms of two parameters, namely, the activation energy for diffusion and the extraction temperature at which 50 percent of the gas is released, both of which correlate with the shock pressure. The experiments indicate that, with increasing shock pressure, gas implantation occurs through an increasing production of microcracks/defects in the silicate lattice. The degree of annealing of these defects control the degree of diffusive loss of implanted gas.

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