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Yamato 791439
Basic information Name: Yamato 791439
     This is an OFFICIAL meteorite name.
Abbreviation: Y-791439
Observed fall: No
Year found: 1979
Country: Antarctica [Collected by National Institute of Polar Research, Japan]
Mass:help 31.1 g
NHM Catalogue:  5th Edition  (2000)  Diogenite
NIPR Catalogue:  2000 Edition  (2000)  Diogenite-B
MetBase:  v. 7.1  (2006)  Eucrite-pmict
Recommended:  Eucrite-pmict    [explanation]

This is 1 of 363 approved meteorites classified as Eucrite-pmict.   [show all]
Search for other: Achondrites, Eucrites, and HED achondrites
Writeup from MN J7(1):

Y-791439, 51-2: Diogenite

(cumulate eucrite  breccia with minor diogenitic and eucritic components)

          Y-791439 is texturally similar to Y-75032, but it contains more abundant clasts of cumulate eucrite than does Y-75032; six clasts (to 2.8 x 2.3 mm) are observed in the PTS. Pyroxene chemical compositions of Y-791439 are divided into four types: D, B, MC, JV. The D-type pyroxenes are the most magnesian in the meteorite, and are similar to Fe-rich diogenites. The B-type pyroxenes are the most abundant, and many of them preserve the original lithic clast shape. The chemical compositions of B-type pyroxenes are slightly more Fe-rich than Binda, but many of them have blebs typical of the Binda cumulate eucrite. The MC-type and JV-type pyroxenes are severely brecciated. The chemical compositions of MC-type are close to those of Moore County and those of rare JV to Juvinas. Minor plagioclase grains are present in the matrix. Y-791439 is classified as an unusual howardite rich in cumulate eucrite components with minor diogenite and rare ordinary eucrite components.

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 41908 approved meteorites from Antarctica (plus 3802 unapproved names)
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