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Allan Hills A80129
Basic information Name: Allan Hills A80129
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA80129
This meteorite may also be called Allan Hills 80129 (ALH 80129) in publications.

Observed fall: No
Year found: 1980
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 93.4 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 5(1)  (1982)  H5
Meteoritical Bulletin:  MB 76  (1994)  H5
NHM Catalogue:  5th Edition  (2000)  H5
MetBase:  v. 7.1  (2006)  H5
Recommended:  H5    [explanation]

This is 1 of 10004 approved meteorites (plus 17 unapproved names) classified as H5.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Writeuphelp
Writeup from AMN 5(1):

Sample No.: ALHA80129

Location: Allan Hills

Field No.: 1027

Weight (gms): 93.4

Meteorite Type: H5 Chondrite

 

Physical Description: Roberta Score

All but two surfaces of this specimen are covered by blackish-brown fusion crust. The interior is medium gray with white and dark gray inclusions. A .5 cm thick weathering rind is present on the interior of the sample. Dimensions: 5.5 x 3.5 x 3 cm

 

Petrographic Description: Brian Mason

Chondrules are moderately abundant, but their margins tend to merge with the granular groundmass, which consists largely of olivine and pyroxene, with minor amounts of nickel-iron, troilite, and fine-grained plagioclase. The specimen is somewhat weathered, with considerable brown limonitic staining concentrated around nickel-iron grains. Microprobe analyses gave the following compositions: olivine, Fa18; pyroxene, Fs15. The meteorite is classified as an H5 chondrite.

Data from:
  MB76
  Table 2
  Line 519:
Origin or pseudonym:Main icefield
Mass (g):93.4
Class:H5
Weathering grade:B
Fayalite (mol%):18
Ferrosilite (mol%):15
Comments:26Al=56±3; 80111 pairing group
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 5(1) (1982), 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° 41' 7"S, 159° 15' 30"E)
Note: the NHM and MetBase coordinates are 11.1 km apart

Statistics:
     This is 1 of 40129 approved meteorites from Antarctica (plus 4494 unapproved names)
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