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Allan Hills A79038
Basic information Name: Allan Hills A79038
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA79038
This meteorite may also be called Allan Hills 79038 (ALH 79038) in publications.

Observed fall: No
Year found: 1979
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 49.7 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 4(1)  (1981)  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 4(1):

Sample No.: ALHA79038

Location: Allan Hills

Field No.: 1158

Weight (gms): 49.6

Meteorite Type: H5 Chondrite

 

Physical Description: Roberta Score

Patches of black fusion crust appear on one surface. The rest of the stone has been weathered to a deep reddish-brown color. No unweathered material was exposed when the sample was chipped. Dimensions: 5 x 3.5 x 1 cm.

 

Petrographic Description: Brian Mason

Chondritic structure is well developed, with chondrules ranging from 0.3-1.2 mm across. They are set in a granular matrix consisting largely of olivine and pyroxene, with minor amounts of nickel-iron and troilite. Fusion crust, up to 0.5 mm thick, rims one edge of the section. Weathering is extensive, with brown limonitic staining throughout the section. Microprobe analyses give the following compositions: olivine, Fa17; pyroxene, Fs15. The meteorite is classified as an H5 chondrite.

Data from:
  MB76
  Table 2
  Line 475:
Origin or pseudonym:Main icefield
Mass (g):49.7
Class:H5
Weathering grade:C
Fayalite (mol%):17
Ferrosilite (mol%):15
Comments:26Al=33±4
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 4(1) (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° 42' 11"S, 159° 23' 34"E)
Note: the NHM and MetBase coordinates are 7.2 km apart

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