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Allan Hills A77282
Basic information Name: Allan Hills A77282
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA77282
This meteorite may also be called Allan Hills 77282 (ALH 77282) in publications.

Observed fall: No
Year found: 1977 or 1978
Country: Antarctica [Collected jointly by ANSMET (US) and NIPR (Japan)]
Mass:help 4.13 kg
Antarctic Meteorite Newsletter:  AMN 1(3)  (1978)  L6
Meteoritical Bulletin:  MB 76  (1994)  L6
NHM Catalogue:  5th Edition  (2000)  L6
MetBase:  v. 7.1  (2006)  L6
Recommended:  L6    [explanation]

This is 1 of 12068 approved meteorites (plus 6 unapproved names) classified as L6.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Writeup from AMN 1(3):
This text was reprinted from AMN 1(3) in AMN 4(1). In some cases, it may be an updated version from the original.

Sample No.: ALHA77282

Location: Allan Hills

Field No.: Y78O10306

Weight (gms): 4127.1

Meteorite Type: L6 Chondrite


Physical Description:

Specimen is angular. Approximately 70% of the meteorite's surface is covered with fusion crust, which is ~2 mm thick. The fractured surface is weathered. This surface has a granular texture and contains rounded to angular, light colored clasts. The fresh surface revealed during chipping is whitish to whitish-gray and contains tiny flecks of metal. This is not a complete specimen. Approximate dimensions are: 17.5x13.0x9.0 cm.


Petrographic Description: Brian Mason

This meteorite resembles ALHA77286 and 77281 in all respects, except possibly for a lesser degree of weathering, limonitic staining being limited to areas around nickel-iron grains; however, this may simply reflect a source further from the surface.

Data from:
  Table 2
  Line 232:
Origin or pseudonym:Main icefield
Mass (g):4127.1
Weathering grade:B
Fayalite (mol%):24
Ferrosilite (mol%):20
Comments:26Al=49±3; 77272 pairing group
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References: Published in Antarctic Meteorite Newsletter 1(3) (1978), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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     Catalogue of Meteorites:   (76° 43'S, 159° 40'E)
     Recommended::   (76° 43'S, 159° 40'E)

     This is 1 of 43352 approved meteorites from Antarctica (plus 3802 unapproved names)
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