header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 26 Mar 2024
Search for: Search type: Search limits: Display: Publication:
Names
Text help
Places
Classes
Years
Contains
Starts with
Exact
Sounds like
NonAntarctic
Falls  Non-NWAs
What's new
  in the last:
Limit to approved meteorite names
Search text:
 
Allan Hills A79027
Basic information Name: Allan Hills A79027
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA79027
This meteorite may also be called Allan Hills 79027 (ALH 79027) in publications.

Observed fall: No
Year found: 1979
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 133.2 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 4(1)  (1981)  L6
Meteoritical Bulletin:  MB 76  (1994)  L6
NHM Catalogue:  5th Edition  (2000)  L6
MetBase:  v. 7.1  (2006)  L6
Recommended:  L6    [explanation]

This is 1 of 12727 approved meteorites (plus 11 unapproved names) classified as L6.   [show all]
Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Writeuphelp
Writeup from AMN 4(1):

Sample No.: ALHA79027

Location: Allan Hills

Field No.: 1156

Weight (gms): 133.2

Meteorite Type: L6 Chondrite

 

Physical Description: Roberta Score

This stone looks as though it may fit together with ALHA79018 to make one stone. Dull black fusion crust covers five surfaces. Patches of fusion crust exist on the fracture surface indicating that this stone broke during entry in the atmosphere. The fracture surface ranges from yellowish-green to red-brown in color. Many inclusions are visible, the largest is 4 mm in its longest dimension (which looks similar to a inclusion in ALHA79018). The interior is light gray in color with reddish-brown oxidation scattered throughout. A 2 mm thick weathering rind is visible. Dimensions: 5.5 x 4.5 x 3 cm.

 

Petrographic Description: Brian Mason

Chondrules are barely discernible, merging with the granular matrix which consist largely of olivine and pyroxene, with minor plagioclase, nickel-iron, and troilite. Fusion crust, up to 0.6 mm thick, rims part of the section. The meteorite is almost unweathered, with only traces of limonitic alteration around the nickel-iron grains. Microprobe analyses gave the following compositions: olivine, Fa24; pyroxene, Fs20; plagioclase, An10. The meteorite is classified as an L6 chondrite.

Data from:
  MB76
  Table 2
  Line 465:
Origin or pseudonym:Main icefield
Mass (g):133.2
Class:L6
Weathering grade:B
Fayalite (mol%):24
Ferrosilite (mol%):20
Comments:26Al=42±3
Catalogs:
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:
Geography:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (76° 43'S, 159° 40'E)
     Recommended::   (76° 41' 59"S, 159° 5' 56"E)
Note: the NHM and MetBase coordinates are 14.7 km apart

Statistics:
     This is 1 of 44400 approved meteorites from Antarctica (plus 3802 unapproved names)
Proximity search:
Find nearby meteorites: enter search radius (km):
Also see:
  This lists the most popular meteorites among people who looked up this meteorite.
Revision
  history:
  This lists important revisions made to data for this record.

Direct link to this page