Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984chjss...4..338l&link_type=abstract
Chinese Journal of Space Science, vol. 4, Oct. 1984, p. 338-346. In Chinese, with abstract in English.
Astronomy and Astrophysics
Astronomy
2
Astronomical Models, Compression Waves, Metamorphism (Geology), Meteoritic Composition, Pyrolytic Materials, Shock Loads, Equations Of State, Hugoniot Equation Of State, Least Squares Method, Mineralogy, Phase Transformations, Planetary Evolution, Pressure Distribution
Scientific paper
Shock-wave instrumentation provides an approach to studying the phase transformation in the Jilin meteorite during shock compression. Experimental Hugoniot points for the meteorite are analyzed by a least-squares method to fit the Birech-Murnaghan or Murnaghan equation of state. A method is proposed for estimating the zero-pressure parameter. Experimental results show that high-pressure phase mineral assemblages are present. The zero-pressure density is 4.395 g/cu cm. It is concluded that there is a perovskite structure mineral with a zero-pressure density of 6.30 g/cu cm. It appears that the dense silicate in the meteorite has a density sufficiently high to be compatible with that of lower mantle mineral assemblages at zero pressure.
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