Mathematics – Logic
Scientific paper
Dec 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982polre..25...97t&link_type=abstract
(Symposium on Antarctic Meteorites, 7th, Tokyo, Japan, Feb. 19, 20, 1982) National Institute of Polar Research, Memoirs, Special
Mathematics
Logic
4
Meteorites, Antarctic Meteorites, Mineralogy, Yamato Meteorites, Eucrites, Achondrites, Ureilites, Stony Meteorites, Samples, Meteorite
Scientific paper
Mineralogical examination of the first one-third of the Yamato-79 achondrites collected by the JARE party in the 1979 and 1980 seasons revealed that eight of them are polymict eucrites similar to the Antarctic polymict eucrites reported previously, and that Y-790727 is a howardite and Y-790981 is a ureilite. The following Yamato-79 eucrites show features different from the known types: Y-790122 and Y-790266 are rich in lithic clasts (a thin section of Y-790122 consists of four different clast types joined together face to face with little matrix between them); almost one-third of Y-790266 is a medium-grained subophitic basalt with pyroxene chemical zoning trends which simulate the host pigeonite and exsolved augite pair of the ordinary eucrites, such as Juvinas; and Y-790007 contains abundant cumulate eucrite clasts identical to Binda in their pyroxene exsolution texture and chemistry.
Takeda Hidenori
Yanai Keizo
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