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Allan Hills A79013
Basic information Name: Allan Hills A79013
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA79013
This meteorite may also be called Allan Hills 79013 (ALH 79013) in publications.

Observed fall: No
Year found: 1979
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 28.3 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.: ALHA79013

Location: Allan Hills

Field No.: 1167

Weight (gms): 28.3

Meteorite Type: H5 Chondrite

 

Physical Description: Roberta Score

The exterior of the stone is totally covered with a dull fusion crust, while the interior of the stone is 95% weathered. A few inclusions are apparent in the unweathered material. Dimensions: 3 x 3 x 1.5 cm.

 

Petrographic Description: Brian Mason

Chondritic structure is well-developed, with chondrules ranging from 0.4-1.9 mm in diameter; one large pyroxene chondrule, 3.1 mm across, was noted. The groundmass between the chondrules consists largely of granular olivine and pyroxene, with minor amounts of nickel-iron and troilite. Fusion crust, up to 0.6 mm thick, partly rims the section. Brown limonitic staining is present throughout. Microprobe analyses gave the following compositions: olivine, Fa18; pyroxene, Fs16. The meteorite is classified as an H5 chondrite.

Data from:
  MB76
  Table 2
  Line 451:
Origin or pseudonym:Main icefield
Mass (g):28.3
Class:H5
Weathering grade:C
Fayalite (mol%):18
Ferrosilite (mol%):16
Comments:26Al=59±3
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' 13"S, 159° 20' 4"E)
Note: the NHM and MetBase coordinates are 8.7 km apart

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