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Yamato 791208
Basic information Name: Yamato 791208
     This is an OFFICIAL meteorite name.
Abbreviation: Y-791208
Observed fall: No
Year found: 1979
Country: Antarctica [Collected by National Institute of Polar Research, Japan]
Mass:help 47.9 g
Classification
  history:
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
Writeuphelp
Writeup from MN J7(1):

Y-791208, 81-4: Howardite

          The thin section shows abundant lithic and mineral fragments, similar to diogenites, cumulate eucrites, and eucrites. Considerable amount of weathering is indicated by large areas of brown rusty staining, which extents into the interior. Two large lithic clasts are found. One clast, 1.2 x 0.9 mm in size, consists of a partly inverted pigeonite crystal texturally similar to that in Nagaria and a homogeneous plagioclase Ab8.2An91.5 Or0.3. The pyroxene with bulk chemical composition Ca14Mg50Fe36, show exsolved (001) augite lamellae up to 10 mm thick. Anot her clast 2.6 x 2.3 mm in size displays a gabbroic texture with crystals of pigeonite and plagioclase (An90). The pigeonite crystals Ca12Mg40Fe48 have round outline and show clouding common in the ordinary eucrites and fine regular exsolution lamellae of augite on (001). Angular and subangular fragments of pyroxene, olivine and calcic plagioclase are set in a much comminuted matrix of the same materials. A fragment of partly inverted pigeonite with coarse exsolution lamellae is present. Typical howardite

Catalogs:
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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Geography:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (71° 30'S, 35° 40'E)
     Recommended::   (71° 30'S, 35° 40'E)

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