The Leedey, Oklahoma, Chondrite: Fall, petrology, chemistry and an unusual Fe,Ni-FeS inclusion

Details The Leedey, Oklahoma, Chondrite: Fall, petrology, chemistry and an unusual Fe,Ni-FeS inclusion The Leedey, Oklahoma, Chondrite: Fall, petrology, chemistry and an unusual Fe,Ni-FeS inclusion

Jan 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997m%26ps...32...19m&link_type=abstract

Meteoritics, vol. 32, pages 19-24

Computer Science

2

Scientific paper

The Leedey, Oklahoma meteorite shower fell on Nov. 25, 1943, following a fireball which was visible across much of southwestern Oklahoma and north-central Texas. The shower produced 24 stones with a total mass of ~51.5 kg. The stones formed a strewnfield ~18 km in length in the same direction as the observed path of the meteor (N50 W). Leedey is classified as an L6(S3) ordinary chondrite. We report bulk major element chemical analyses from four separate laboratories. Leedey contains an unusual 6 by 8 mm composite Fe,Ni-FeS grain, which is composed of a 3 mm kamacite grain adjacent to a 5 mm troilite grain. A 50-100 micron rim of high-Ni (45-55 wt.%) taenite (tetrataenite) occurs at the boundary between kamacite and troilite. A single, zoned pyrophanite grain is observed at the boundary between the inclusion troilite and host silicates. An origin as a foreign particle incorporated after metamorphism or during impact melting appears unlikely. This particle likely formed by a complex set of processes, including melting in the nebula, parent body metamorphism and reheating by later shock, mirroring the history of the host chondrite.

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