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Allan Hills A80111
Basic information Name: Allan Hills A80111
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA80111
This meteorite may also be called Allan Hills 80111 (ALH 80111) in publications.

Observed fall: No
Year found: 1980
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 42.4 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 9655 approved meteorites (plus 16 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.: ALHA80111

Location: Allan Hills

Field No.: 1016

Weight (gms): 42.4

Meteorite Type: H5 Chondrite

 

Physical Description: Carol Schwarz

The specimen is totally covered with smooth thin black fusion crust. The bottom is shiny and iridescent while the remainder is dull with some polygonal fracturing. The interior of the stone is gray with some oxidation halos. Dimensions: 4.5 x 4 x 2.5 cm

 

Petrographic Description: Brian Mason

Chondritic structure is moderately well developed, but the margins of many of the chondrules are diffuse, tending to merge with the granular ground-mass, which consists largely of olivine and pyroxene, with minor amounts of nickel-iron and troilite. Brown limonitic staining surrounds the nickel-iron grains. Microprobe analyses gave the following compositions: olivine, Fa18; orthopyroxene, Fs16. A little fine-grained plagioclase, An12, was analyzed, and one grain of merrillite. The meteorite is classified as an H5 chondrite.

Data from:
  MB76
  Table 2
  Line 501:
Origin or pseudonym:Main icefield
Mass (g):42.4
Class:H5
Weathering grade:B
Fayalite (mol%):18
Ferrosilite (mol%):16
Comments: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° 45' 7"S, 159° 19' 29"E)
Note: the NHM and MetBase coordinates are 9.6 km apart

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