Petrogenesis of complex veins in the Chantonnay /L6f/ chondrite

Details Petrogenesis of complex veins in the Chantonnay /L6f/ chondrite Petrogenesis of complex veins in the Chantonnay /L6f/ chondrite

Jul 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982e%26psl..59..364d&link_type=abstract

Earth and Planetary Science Letters, vol. 59, no. 2, July 1982, p. 364-374.

Computer Science

13

Chemical Fractionation, Chondrites, Impact Melts, Meteoritic Composition, Petrography, Chemical Composition, Chondrule, Glass, Metals, Reduction (Chemistry), Silicates, Sodium, Troilite, Meteorites, L Chondrites, Petrogenesis, Chantonnay, Fractionation, Patterns, Shock Effects, Melts, Samples, Meteorite, Characteristics, Reduction, Sodium, Differentiation, Chemistry, Comparisons, Chondrules, Metals, Iron, Composition, Ordinary Chondrites, Parent Bodies, Analysis, Petrography, Microprobe Methods

Scientific paper

Two cross-cutting veins in the Chantonnay (L6f) chondrite illustrate different patterns of fractionation of total chondritic shock melts. The earlier vein, which is dark-colored and bears abundant host rock xenoliths, is strongly reduced and sodium-poor relative to the bulk meteorite. It resembles and may be cogenetic with melt pockets in Chantonnay. The later vein, which is lighter-colored and somewhat vesicular, lacks evidence of either Na loss or reduction but shows modest internal differentation. Its metal and total iron contents (26.5 wt.%) are higher than normal for L-group chondrites. The trend of chemical fractionation recorded in the earlier Chantonnay vein resembles that reported for chondrules in ordinary chondrites, suggesting that chemical variations among chondrules in part reflect variations among their parental shock melts.

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