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Allan Hills A80101
Basic information Name: Allan Hills A80101
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA80101
This meteorite may also be called Allan Hills 80101 (ALH 80101) in publications.

Observed fall: No
Year found: 1980
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 8.73 kg
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 4(2)  (1981)  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 11000 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)
Writeuphelp
Writeup from AMN 4(2):

Sample No.: ALHA80101

Location: Allan Hills

Field No.: 1023

Weight (gms): 8725.0

Meteorite Type: L6 Chondrite

 

Physical Description: Carol Schwarz

 

he sample has black fusion crust on two surfaces. The texture of the rest of the meteorite is rough and has weathered to a reddish-brown color. Some distinct chondrules or clasts that are cream colored can be distinguished. The sample shows linear fractures which are more severely weathered. The interior of this stone is gray with numerous oxidation halos. A darker gray weathering rind is discontinuous. Where broken along fractures, some white evaporate deposit was exposed. This specimen is similar to ALHA80103 and ALHA80105. The samples have weathered too much to fit together as one sample. Dimensions: 31 x 17 x 15 cm.

 

Petrographic Description: Brian Mason

Chondrules are sparse and poorly defined, tending to merge with the granular groundmass, which consists largely of olivine and pyroxene, with minor amounts of plagioclase, troilite, and nickel-iron. A moderate amount of limonitic staining is present around .he nickel-iron grains. Microprobe analyses gave the following mineral compositions: olivine, Fa24; orthopyroxene, Fs20; plagioclase, An11. The meteorite is classified as an L6 chondrite. Polished thin sections of ALHA80103, 80105 are identical in texture, mineral compositions, and degree of weathering with ALHA80101, indicating that these three specimens are pieces of a single meteorite.

Data from:
  MB76
  Table 2
  Line 492:
Origin or pseudonym:Main icefield
Mass (g):8725
Class:L6
Weathering grade:Be
Fayalite (mol%):24
Ferrosilite (mol%):20
Comments:80101 pairing group
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 4(2) (1981), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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Geography:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (76° 43'S, 159° 40'E)
     Recommended::   (76° 46' 26"S, 159° 16' 30"E)
Note: the NHM and MetBase coordinates are 11.9 km apart

Statistics:
     This is 1 of 39173 approved meteorites from Antarctica (plus 5051 unapproved names)
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