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Allan Hills A81026
Basic information Name: Allan Hills A81026
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA81026
This meteorite may also be called Allan Hills 81026 (ALH 81026) in publications.

Observed fall: No
Year found: 1981
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 516 g
Antarctic Meteorite Newsletter:  AMN 6(1)  (1983)  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 12478 approved meteorites (plus 8 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 6(1):

Sample No.: ALHA81026

Location: Allan Hills

Field No.: 1149

Weight (gms): 515.5

Meteorite Type: L6 Chondrite

Physical Description: Roberta Score

Dull black fusion crust covers some of this knobby-looking equilibrated chondrite. The interior, exposed by chipping, appears fresh with some haloes around the metal grains. Dimensions: 11 x 5.5 x 6 cm.


Petrographic Description: Brian Mason

Chondrules are sparse, with diffuse boundaries that merge with the granular groundmass, which consists largely of olivine and pyroxene with minor amounts of plagioclase, nickel-iron, and troilite. Weathering is restricted to minor brown limonitic staining around metal grains. Microprobe analyses gave the following compositions: olivine, Fa25; orthopyroxene, Fs21; plagioclase, An10; a grain of apatite was analyzed. The meteorite is an L6 chondrite.

Data from:
  Table 2
  Line 549:
Origin or pseudonym:Main icefield
Mass (g):515.5
Weathering grade:B
Fayalite (mol%):25
Ferrosilite (mol%):21
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References: Published in Antarctic Meteorite Newsletter 6(1) (1983), 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° 40' 53"S, 159° 20' 48"E)
Note: the NHM and MetBase coordinates are 9.1 km apart

     This is 1 of 44048 approved meteorites from Antarctica (plus 3802 unapproved names)
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