The compositions of incipient shock melts in L6 chondrites |
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| Authors: | R.T. Dodd E. Jarosewich |
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| Affiliation: | Department of Earth and Space Sciences, State University of New York at Stony Brook, NY 11794, (U.S.A.);Department of Mineral Sciences, U.S. National Museum, Washington, DC 20560, (U.S.A.) |
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| Abstract: | Microprobe analyses of 33 melt pocket glasses in five L6d and L6e chondrites show them to be chemically varied but typically enriched in the constituents of plagioclase relative to the host meteorites. This enrichment appears to increase with the degree of melting (0–6.5 vol.%), but other chemical variations among the glasses (sodium depletion, reduction of ferrous iron) appear to be unrelated to shock intensity and melt abundance.Chemical trends for melt pocket glasses differ sharply from those reported for chondrules in ordinary chondrites. Thus partial shock melting of chondritic material is an inadequate explanation for the chemical properties of chondrules. |
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