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Allan Hills A79006
Basic information Name: Allan Hills A79006
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA79006
This meteorite may also be called Allan Hills 79006 (ALH 79006) in publications.

Observed fall: No
Year found: 1979
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 41 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.: ALHA79006

Location: Allan Hills

Field No.: 1197

Weight (gms): 40.9

Meteorite Type: H5 Chondrite

 

Physical Description: Roberta Score

Dull black fusion crust covers all but two surfaces of this meteorite. Areas devoid of fusion crust are reddish-brown in color and contain clasts. The interior material is brownish-yellow in color and contains many clasts. The surface that was exposed was along a pre-existing crack and therefore the stone may be less weathered than it appears at first glance. Dimensions: 6 x 2.5 x 2 cm.

 

Petrographic Description: Brian Mason

The section is moderately chondritic, with chondrules ranging from 0.3-1.2 mm in diameter. The chondrules are set in a fine- to medium-grained groundmass, which consists largely of olivine and pyroxene, with minor amounts of nickel-iron and troilite; brown limonitic staining is present around the nickel-iron grains. Remnants of fusion crust, up to 0.3 mm thick, are present along one edge. Microprobe analyses show olivine (Fa18) and pyroxene (Fs15) of uniform composition. The meteorite is classified as an H5 chondrite.

Data from:
  MB76
  Table 2
  Line 444:
Origin or pseudonym:Main icefield
Mass (g):41
Class:H5
Weathering grade:B/C
Fayalite (mol%):18
Ferrosilite (mol%):15
Comments:26Al=58±5
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' 6"S, 159° 21' 12"E)
Note: the NHM and MetBase coordinates are 8.2 km apart

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