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Allan Hills A81037
Basic information Name: Allan Hills A81037
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA81037
This meteorite may also be called Allan Hills 81037 (ALH 81037) in publications.

Observed fall: No
Year found: 1981
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 320 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 6(1)  (1983)  H6
Meteoritical Bulletin:  MB 76  (1994)  H6
NHM Catalogue:  5th Edition  (2000)  H6
MetBase:  v. 7.1  (2006)  H6
Recommended:  H6    [explanation]

This is 1 of 6102 approved meteorites (plus 5 unapproved names) classified as H6.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Writeuphelp
Writeup from AMN 6(1):

Sample No.: ALHA81037

Location: Allan Hills

Field No.: 1489

Weight (gms): 320.3

Meteorite Type: H6 Chondrite

Physical Description: Carol Schwarz

This angular specimen has fusion crust on all but two sides. The fusion crust is black with rust haloes and is polygonally fractured. The interior is moderately weathered with oxidation haloes in a light yellowish-gray matrix. Dimensions: 7.5 x 6 x 4 cm.

 

Petrographic Description: Brian Mason

Chondrules are sparse and poorly defined, merging with the granular ground-mass, which consists largely of olivine and pyroxene, with minor amounts of nickel-iron, troilite, and plagioclase. Well preserved fusion crust is present along one edge. Areas of brown limonitic staining occur throughout the section. Microprobe analyses give the following compositions: olivine, Fa20; orthopyroxene, Fs17; plagioclase, An12. The meteorite is an H6 chondrite.

Data from:
  MB76
  Table 2
  Line 560:
Origin or pseudonym:Main icefield
Mass (g):320.3
Class:H6
Weathering grade:B
Fayalite (mol%):20
Ferrosilite (mol%):17
Comments:26Al=56±4
Catalogs:
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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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Geography:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (76° 43'S, 159° 40'E)
     Recommended::   (76° 43'S, 159° 40'E)

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