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Yamato 791492
Basic information Name: Yamato 791492
     This is an OFFICIAL meteorite name.
Abbreviation: Y-791492
Observed fall: No
Year found: 1979
Country: Antarctica [Collected by National Institute of Polar Research, Japan]
Mass:help 41.1 g
NHM Catalogue:  5th Edition  (2000)  Howardite
NIPR Catalogue:  2000 Edition  (2000)  Howardite
MetBase:  v. 7.1  (2006)  Howardite
Recommended:  Howardite    [explanation]

This is 1 of 398 approved meteorites classified as Howardite.   [show all]
Search for other: Achondrites, HED achondrites, and Howardites
Writeup from MN J7(1):

Y-791492, 81-1: Howardite

          A thin section shows complex breccia of angular fragments up to 2 mm long, of orthopyroxene, inverted pigeonite, pigeonite, olivine, plagioclase, chromite, ilmenite, silica, and other opaque minerals set in a matrix of comminuted mineral fragments. Lithic clasts are rather rare in comparison with other Yamato-79 howardites. The matrix does not show rusty staining as was observed in Y-791208. Many orthopyroxene fragments do not show the exsolution of augite that was observed in diogenites, but they may be similar to diogenites. One orthopyroxene fragment has a small chromite attached to the edge. Two subrounded fragments of cumulate eucrite pyroxene include oriented blebby inclusions of augite. Fe-rich eucritic pigeonite shows exsolution of augite on (001). Three small eucritic lithic clasts were observed in which pigeonite also shows exsolution.

Search for this meteorite in the NIPR database (Japan):   
References: Published in Meteorites news : Japanese collection of Antarctic meteorites / Meteorites news : Japanese collection of Antarctic meteorites ,7(1),1-94 (1998-06)
Never published in the Meteoritical Bulletin
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     Catalogue of Meteorites:   (71° 30'S, 35° 40'E)
     Recommended::   (71° 30'S, 35° 40'E)

     This is 1 of 40759 approved meteorites from Antarctica (plus 4494 unapproved names)
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