The Shaw meteorite

Details The Shaw meteorite The Shaw meteorite

Oct 1967

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1967gecoa..31.1705f&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 31, Issue 10, pp.1705-1708

Computer Science

7

Scientific paper

Shaw is an unusual meteorite, having chondritic composition but lacking chondritic structure. It consists largely of olivine (Fa 23 ) and orthopyroxene (Fs 20 ) with minor amounts of diopside (Ca 38 Fe 11 Mg 51 ), plagioclase (Ab 84 An 12 Or 4 ), troilite, and nickel-iron. The chemical analysis is Fe 1.76, Ni 0.80, FeS 3.95, SiO 2 42.23, TiO 2 0.13, Al 2 O 3 2.21, Cr 2 O 3 0.28, Fe 2 O 3 2.78, FeO 13.65, MnO 0.34, MgO 27.34, CaO 1.79, Na 2 O 0.99, K 2 O 0.10, P 2 O 5 0.2, H 2 O+ 0.89. H 2 O-0.15, total 99.61. The calcium content of the orthopyroxene and the diopside suggests an unusually high temperature of crystallization, probably above 1100°C.

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