Al-rich objects in ordinary chondrites - Related origin of carbonaceous and ordinary chondrites and their constituents

Details Al-rich objects in ordinary chondrites - Related origin of carbonaceous and ordinary chondrites and their constituents Al-rich objects in ordinary chondrites - Related origin of carbonaceous and ordinary chondrites and their constituents

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984gecoa..48..693b&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 48, April 1984, p. 693-709. Research supported by the Deutsche Forschungs

Computer Science

66

Aluminum, Carbonaceous Chondrites, Chondrites, Meteoritic Composition, Aluminum Oxides, Calcium, Chemical Composition, Electron Microscopy, Microphotographs, Mineralogy, Petrology, Meteorites, Chondrites, Ordinary Chondrites, Origin, Aluminum, Calcium, Carbonaceous Chondrites, Cais, Inclusions, Kakangari, Texture, Shape, Dust, Chondrules, Fragments, Abundance, Comparisons, Origin, Volatiles, Formation, Phases, Models, Composition, Mixing, Refractory Elements

Scientific paper

A description is given of 169 Al-rich objects (arbitrarily defined as having 10 wt pct or more of Al2O3) from 24 ordinary chondrites of types 3 and 4, five regolith breccias containing unequilibrated material, the unique meteorite Kakangari, and a few ordinary chondrites of types 5 and 6. On the basis of shape and texture, the Al-rich objects are divided into chondrules (round, with igneous textures), irregularly shaped inclusions (similar to type F and spinel-rich complex Ca-Al-rich inclusions), and fragments (probably fragments of Al-rich chondrules and inclusions). For descriptive purposes, the Al-rich chondrules are further subdivided into compositional subgroups, although they are entirely transitional.

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