The Blue Angel. I - The mineralogy and petrogenesis of a hibonite inclusion from the Murchison meteorite

Details The Blue Angel. I - The mineralogy and petrogenesis of a hibonite inclusion from the Murchison meteorite The Blue Angel. I - The mineralogy and petrogenesis of a hibonite inclusion from the Murchison meteorite

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982gecoa..46..575a&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 46, Apr. 1982, p. 575-595.

Mathematics

Logic

20

Aluminates, Carbonaceous Chondrites, Inclusions, Meteoritic Composition, Mineralogy, Petrology, Calcite, Calcium Compounds, Chemical Analysis, Electron Microscopy, Hydration, Oxygen Isotopes, Perovskites, Phase Transformations, Spinel, Temperature Effects, Meteorites, Murchison Meteorite, Blue Angel, Mineralogy, Petrogenesis, Hibonite, Inclusions, Petrology, Chemistry, Petrography, Calcium, Data, Formation, History, Composition, Zones, Condensation, Temperature, Sem, Alteration, Metamorphism, Carbon Dioxide

Scientific paper

Results are presented of a mineralogical and petrological examination of a relatively large hibonite-containing inclusion in the Murchison chondrite called the Blue Angel. Mechanisms of formation and modification of hibonite-rich inclusions are investigated. Evidence is found that modifying processes occurred before the inclusion was incorporated into its present location, which indicates a sequence of aqueous and metamorphic alteration followed by disruption and relithification of the protometeoritic material. The mineral chemistry and petrography of the Blue Angel is consistent with a three stage formation history, and extensive alteration of Ca-Al-rich inclusions may have occurred by aqueous alteration and thermal metamorphism followed by explosive mixing processes on a parent body.

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