Direct measurements of impact devolatilization of calcite using a laser gun

Details Direct measurements of impact devolatilization of calcite using a laser gun Direct measurements of impact devolatilization of calcite using a laser gun

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3513202o&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 13, CiteID L13202

Biology

6

Planetary Sciences: Solid Surface Planets: Impact Phenomena, Cratering (6022, 8136), Mineral Physics: Shock Wave Experiments, Planetary Sciences: Solid Surface Planets: Instruments And Techniques, Planetary Sciences: Astrobiology: Formation Of Stars And Planets, Mineralogy And Petrology: Reactions And Phase Equilibria (1012, 8412)

Scientific paper

Devolatilization of volatile-bearing minerals caused by hypervelocity impacts is believed to have played important roles in atmosphere formation and the evolution of surface environments of terrestrial planets. The threshold shock pressure required for devolatilization is one of the most important parameters. In this study, we show a new experimental method to directly measure impact Devolatilization of volatile-bearing minerals using a laser gun, which can avoid the problems of previous studies. We applied this method to the devolatilization of calcite. The results show that the shock pressure required for incipient devolatilization of calcite is lower than 24.9 +/- 2.6 GPa which is significantly lower than previous experimental studies.

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