The Shaw meteorite - History of a chondrite consisting of impact-melted and metamorphic lithologies

Details The Shaw meteorite - History of a chondrite consisting of impact-melted and metamorphic lithologies The Shaw meteorite - History of a chondrite consisting of impact-melted and metamorphic lithologies

Mar 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979gecoa..43..323t&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 43, Mar. 1979, p. 323-337.

Mathematics

Logic

20

Chondrites, Lithology, Metamorphism (Geology), Meteoritic Composition, Calcium Oxides, Electron Microscopy, Feldspars, Olivine, Petrology, Olivines, Chemical Composition, Plagioclase, Melts, Shaw Meteorite, Chondrites, History, Meteoroid Impacts, Metamorphism, Lithologies, Crystals, Abundance, Kamacite, Breccias, Cooling Rate, Troilite, Petrology, Morphology, Feldspars, Crystallization, Rocks, Parent Bodies, Temperatures

Scientific paper

Three intermingled lithologies are identified in the Shaw L-group chondrite: a light-colored lithology with a poikilitic texture, consisting of olivine and augite crystals surrounded by larger orthopyroxene grains; a dark-colored lithology containing remnant chondrules and exhibiting a microgranular texture; and a gray lithology which appears to be intermediate between the other two. Contrary to published opinions, the Shaw meteorite contains normal L-group chondrite abundances of metal and troilite, though these phases are irregularly distributed. The lithological analyses suggest that 4.52 Byr ago an impact took place on the L-group chondrite parent object of Shaw.

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