244 Pu Fission Track Thermometry and its Application to Stony Meteorites

Details 244 Pu Fission Track Thermometry and its Application to Stony Meteorites 244 Pu Fission Track Thermometry and its Application to Stony Meteorites

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981rspsa.374..253p&link_type=abstract

Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences, Volume 374, Issue 1757, pp. 253-270

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79

Scientific paper

Revised cooling rates, obtained from mineral separates of several ordinary chondrites by means of the multiple fission track detector method, are presented. Especially for the H chondrites, these new data lead to major revisions of the previously published results. They are consistent with an `onion-shell' structure of the parent asteroids of ordinary chondrites, in which petrologic type 6 materials resided near the central region, and types 5, 4 and 3 in the outer shells. The diameters of these asteroids are estimated to be between 100 and 140 km for the H body, greater than 200 km for the L body, and 220-300 km for the LL body.

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