Fall, recovery and description of the Coleman Chondrite

Details Fall, recovery and description of the Coleman Chondrite Fall, recovery and description of the Coleman Chondrite

Nov 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997m%26ps...32..781o&link_type=abstract

Meteoritics & Planetary Science, vol. 32, no. 6, pages 781-790

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Scientific paper

A 0.5-kg stony meteorite associated with a bright bolide seen over southeastern Michigan on October 20, 1994, has been recovered. The circumstances of the fall and recovery of this chondrite, named Coleman, are presented. The most likely trajectory from the observations of the event implies pre-atmospheric orbital parameters typical of meteorites. Gamma-ray spectrometry of the cosmogenic radionuclides showed the recovered mass was an interior fragment of a larger body and revealed abnormally high 22Na and 26Al activity. Electron microprobe analysis yielded compositions of Fa24.1 and Fs20.3 , which are consistent with an L-chondrite classification. Petrographically, the presence of chondrules, the observed mineralogy, and the degree of chondrule- matrix integration suggests assignment to petrologic type 6.

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