Penecontemporaneous metamorphism, fragmentation, and reassembly of ordinary chondrite parent bodies

Details Penecontemporaneous metamorphism, fragmentation, and reassembly of ordinary chondrite parent bodies Penecontemporaneous metamorphism, fragmentation, and reassembly of ordinary chondrite parent bodies

Feb 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.2022g&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 90, Feb. 10, 1985, p. 2022-2028.

Mathematics

Logic

30

Chondrites, Fragmentation, Metamorphism (Geology), Petrology, Agglomeration, Collision Parameters, Cooling, Diameters, Rates (Per Time), Meteorites, Metamorphism, Fragmentation, Ordinary Chondrites, Petrology, Parent Bodies, Heating, Models, Metallography, Cooling Rates, Analysis, Planetesimals, Depth, Thermal Effects, Collisions, Size, Comparisons

Scientific paper

The thermal histories of ordinary chondrites and the canonical internal heating or onion shell models, which predict an inverse relation between the petrologic type of chondrites and the metallographic cooling rate, are reviewed. The thermal and accretional requirements of the 'metamorphosed planetesimal' model proposed by Scott and Rajan (1981) are analyzed, and an alternative model consistent with the metallographic cooling rate constraints is suggested in which ordinary chondrite parent bodies are collisionally fragmented and then rapidly reassembled before metamorphic heat has been dissipated.

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