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Allan Hills A79008
Basic information Name: Allan Hills A79008
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA79008
This meteorite may also be called Allan Hills 79008 (ALH 79008) in publications.

Observed fall: No
Year found: 1979
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 12 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.: ALHA79008

Location: Allan Hills

Field No.: 1164

Weight (gms): 12.0

Meteorite Type: H5 Chondrite

 

Physical Description: Roberta Score

This angular shaped stone has four of six surfaces that are covered with dull black fusion crust. The areas devoid of fusion crust range in color from yellow to reddish-brown. The interior is light gray in color and contain medium gray colored clasts. Oxidation is apparent along cracks, also apparent is a small weathering rind that is not continuous around the interior. Dimensions: 3 x 1.5 x 1.5 cm.

 

Petrographic Description: Brian Mason

Chondritic structure is well developed, with chondrules ranging up to 1 mm in diameter; on one edge of the section is a granular olivine pyroxene enclave, 3 mm across, possibly part of a larger chondrule. The matrix consists largely of fine- to medium-grained olivine and pyroxene, with minor amounts of nickel-iron and troilite. Brown limonitic staining is pervasive throughout the section. Microprobe analyses show olivine (Fa17) and pyroxene (Fs15) of uniform composition, both in the enclave and the main part of the section. The meteorite is classified as an H5 chondrite.

Data from:
  MB76
  Table 2
  Line 446:
Origin or pseudonym:Main icefield
Mass (g):12
Class:H5
Weathering grade:B
Fayalite (mol%):17
Ferrosilite (mol%):15
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' 17"S, 159° 19' 24"E)
Note: the NHM and MetBase coordinates are 8.9 km apart

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