MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 6 Aug 2022
Search for: Search type: Search limits: Display: Publication:
Text help
Starts with
Sounds like
Falls  Non-NWAs
What's new
  in the last:
Limit to approved meteorite names
Search text:  
Allan Hills A79012
Basic information Name: Allan Hills A79012
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA79012
This meteorite may also be called Allan Hills 79012 (ALH 79012) in publications.

Observed fall: No
Year found: 1979
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 191.9 g
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 10884 approved meteorites (plus 19 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)
Writeup from AMN 4(1):

Sample No.: ALHA79012

Location: Allan Hills

Field No.: 1052

Weight (gms): 191.9

Meteorite Type: H5 Chondrite


Physical Description: Roberta Score

Fusion crust exists as thin patches over all but one surface. Several cracks penetrate the interior of this meteorite. The overall color of the stone is a deep reddish-brown. No unweathered material was exposed when the sample was chipped. Dimensions: 9 x 5.5 x 3.5 cm.


Petrographic Description: Brian Mason

Chondritic structure is well-developed, with chondrules 0.5-1.2 mm in diameter. The chondrules are set in a fine-grained matrix consisting largely of olivine and pyroxene, with minor amounts of nickel-iron and troilite. Weathering is extensive, with limonitic staining and areas of red-brown limonite throughout the section. Remnants of fusion crust are present along one edge. Microprobe analyses gave the following compositions: olivine, Fa17; pyroxene, Fs15; accessory merrillite was identified. The meteorite is classified as an H5 chondrite.

Data from:
  Table 2
  Line 450:
Origin or pseudonym:Main icefield
Mass (g):191.9
Weathering grade:C
Fayalite (mol%):17
Ferrosilite (mol%):15
Search for specimens in the Smithsonian Institution collection (U.S.):   
    Require SI photo
Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 4(1) (1981), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
Find references in NASA ADS:
Find references in Google Scholar:

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

     This is 1 of 43352 approved meteorites from Antarctica (plus 3802 unapproved names)
Proximity search:
Find nearby meteorites: enter search radius (km):

Direct link to this page