header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 7 Nov 2019
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 A81003
Basic information Name: Allan Hills A81003
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA81003
This meteorite may also be called Allan Hills 81003 (ALH 81003) in publications.

Observed fall: No
Year found: 1981
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 10.1 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 6(1)  (1983)  CV3
AMN 17(1)  (1994)  CV3-an
Meteoritical Bulletin:  MB 76  (1994)  CV3-an
NHM Catalogue:  5th Edition  (2000)  CV3
MetBase:  v. 7.1  (2006)  CV3-an
Recommended:  CV3-an    [explanation]

This is 1 of 5 approved meteorites classified as CV3-an.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CV chondrites, and CV-CK clan chondrites
Writeuphelp
Writeup from AMN 6(1):

Sample No.: ALHA81003

Location: Allan Hills

Field No.: 1228

Weight (gms): 10.1

Meteorite Type: C3V Carbonaceous Chondrite

 

Physical Description: Roberta Score

One small patch of fusion crust remains on this clastic carbonaceous chondrite. Abundant irregular shaped white inclusions dot the otherwise black surface. Few of the inclusions are oxidated. Metal was noted. Dimensions: 2.5 x 2.0 x 1.5 cm.

 

Petrographic Description: Brian Mason

The section shows numerous chondrules up to 3 mm across and irregular crystalline aggregates up to 2 mm in maximum dimension set in a minor amount of dark brown to black semi-opaque matrix. The chondrules and aggregates consist mainly of olivine with some polysynthetically twinned pyroxene. Trace amounts of nickel-iron are present as minute grains. Sulfide is present in minor amount, finely dispersed throughout the section. Microprobe analyses of chondrule's olivine show a wide composition range: Fa0-40, mean Fa8; the matrix consists largely of fine-grained iron-rich olivine, Fa40-60. Pyroxene in the chondrules is clinoenstatite, mostly near Fs1, but with occasional Fe-rich grains. The meteorite is classified as a C3V chondrite.

Data from:
  MB76
  Table 2
  Line 526:
Origin or pseudonym:Main icefield
Mass (g):10.1
Class:CV3 an
Weathering grade:A/B
Fayalite (mol%):0-60
Ferrosilite (mol%):1
Comments:81003 pairing group
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 6(1) (1983), 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° 42' 21"S, 159° 15' 3"E)
Note: the NHM and MetBase coordinates are 10.7 km apart

Statistics:
     This is 1 of 39173 approved meteorites from Antarctica (plus 5051 unapproved names)
Proximity search:
Find nearby meteorites: enter search radius (km):

Direct link to this page