An H chondrite stream - Identification and confirmation

Details An H chondrite stream - Identification and confirmation An H chondrite stream - Identification and confirmation

Aug 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....9815105d&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. E8, p. 15,105-15,118.

Other

23

Chondrites, Earth Ionosphere, Hypervelocity Impact, Meteoroid Showers, Trace Elements, Neon Isotopes, Orbital Elements, Thermal Analysis

Scientific paper

Fall data indicate that a significant, elongate cluster of co-orbital H chondrite falls in May between 1855 and 1895 (H Cluster 1) records encounters with two or three closely spaced and probably related meteoroid stream components, each of which was met near its perihelion. Although meteorites included in the cluster vary widely in petrographic type, shock facies, and Ne-21 exposure age, they have a distinct labile trace element signature that confirms a common thermal history and, thus, a common source region within an H chondrite parent body. Hence, meteorites selected by one criterion (fall parameters) as distinguishable from all other H chondrites, are distinguished from them by another completely different criterion (contents of labile trace elements).

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