Mathematics – Probability
Scientific paper
Dec 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmmr12a..06d&link_type=abstract
American Geophysical Union, Fall Meeting 2008, abstract #MR12A-06
Mathematics
Probability
3630 Experimental Mineralogy And Petrology, 3662 Meteorite Mineralogy And Petrology (1028, 6240), 3672 Planetary Mineralogy And Petrology (5410), 3944 Shock Wave Experiments, 6213 Dust
Scientific paper
Recent studies of high pressure minerals in melt veins have shown that the S6 shock stage, designating the most strongly shocked chondriticmeteorites, corresponds to a peak shock pressure of about 25 GPa and an effective shock pressure duration of the order of one second. (Sharp and De Carli 2006) Calculations of the probability distribution of asteroid-asteroid impact velocities in the early solar system indicate a broad peak over the range of 2-7 km/s with a mean of 5.29 km/s. (Bottke et al 1994) The peak pressure at the point of impact between two bodies of chondritic composition would be about 25 GPa for a 2 km/s impact. For a 7 km/s impact, the peak pressure would be about 100 GPa. We would therefore expect to find a substantial population of meteorites showing evidence of having been shocked to pressures over the range between 25 and 100 GPa. In fact, there are very few chondrites that appear to have been shocked to pressures above 25 GPa. Here we present the results of Autodyn (TM) hydrocode calculations of asteroid-asteroid impacts over the velocity range of 2-7 km/s to provide a measure of the range of expected shock effects in meteorites
de Carli Paul S.
Sharp Thomas G.
Xie Zhaohua
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