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Allan Hills A81067
Basic information Name: Allan Hills A81067
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA81067
This meteorite may also be called Allan Hills 81067 (ALH 81067) in publications.

Observed fall: No
Year found: 1981
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 228 g
Antarctic Meteorite Newsletter:  AMN 6(1)  (1983)  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 11077 approved meteorites (plus 22 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)
Writeup from AMN 6(1):

Sample No.: ALHA81067

Location: Allan Hills

Field No.: 1597, 1599

Weight (gms): 227.6

Meteorite Type: H5 Chondrite

Physical Description: Carol Schwarz

This specimen consists of two pieces which fit together perfectly. The "exterior" surfaces have a thin patchy fusion crust while the "interior" surfaces are a dark iridescent brown. The interior exposed by chipping is totally weathered. Dimensions: 7 x 5.5 x 4 cm.


Petrographic Description: Brian Mason

Chondrules are abundant, but for many of them their margins are diffuse, merging with the granular groundmass, which consists of olivine and pyroxene with minor amounts of nickel-iron and troilite. Weathering is extensive, with limonite veinlets throughout the section. Microprobe analyses give the following compositions: olivine, Fa19; orthopyroxene, Fs17. The meteorite is classified as an H5 chondrite.

Data from:
  Table 2
  Line 590:
Origin or pseudonym:Main icefield
Mass (g):227.6
Weathering grade:C
Fayalite (mol%):19
Ferrosilite (mol%):17
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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° 41' 44"S, 159° 19' 51"E)
Note: the NHM and MetBase coordinates are 8.9 km apart

     This is 1 of 43840 approved meteorites from Antarctica (plus 3802 unapproved names)
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