The group A3 chondrules of Krymka: Further evidence for major evaporative loss during the formation of chondrules

Details The group A3 chondrules of Krymka: Further evidence for major evaporative loss during the formation of chondrules The group A3 chondrules of Krymka: Further evidence for major evaporative loss during the formation of chondrules

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993lpi....24..681h&link_type=abstract

In Lunar and Planetary Inst., Twenty-Fourth Lunar and Planetary Science Conference. Part 2: G-M p 681-682 (SEE N94-16173 03-91)

Mathematics

Logic

3

Chondrule, Evaporation, Metamorphism (Geology), Meteorites, Meteoritic Composition, Mineralogy, Iron Oxides, Oxidation-Reduction Reactions, Silicon Dioxide

Scientific paper

Like Semarkona (type 3.0), Krymka (type 3.1) contains two distinct types of chondrule (namely groups A and B) which differ in their bulk compositions, phase compositions, and CL properties. The group A chondrules in both meteorites show evidence for major loss of material by evaporation(i.e. elemental abundance patterns, size, redox state, olivine-pyroxene abundances). Group A and B chondrules probably formed from common or very similar precursors by the same processes acting with different intensities, group A suffering greater mass-loss by evaporation and reduction of FeO and SiO2. While Krymka chondrules share many primary mineralogical and compositional properties with Semarkona chondrules, the minimal metamorphism it has suffered has also had a significant effect on its chondrules.

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