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Allan Hills A80133
Basic information Name: Allan Hills A80133
     This is an OFFICIAL meteorite name.
Abbreviation: ALHA80133
This meteorite may also be called Allan Hills 80133 (ALH 80133) in publications.

Observed fall: No
Year found: 1980
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 3.6 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 5(1)  (1982)  CV3
AMN 7(1)  (1984)  L3
Meteoritical Bulletin:  MB 76  (1994)  L3
NHM Catalogue:  5th Edition  (2000)  L3
MetBase:  v. 7.1  (2006)  L3.5
Recommended:  L3.5    [explanation]

This is 1 of 95 approved meteorites classified as L3.5.   [show all]
Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3)
Writeuphelp
Writeup from AMN 5(1):

Sample No.: ALHA80133

Location: Allan Hills

Field No.: 1018

Weight (gms): 3.6

Meteorite Type: C3V Chondrite

 

Physical Description: Roberta Score

No fusion crust is present on this shiny reddish-brown specimen. The interior is highly weathered with some rounded inclusions visible.

 

Petrographic Description: Brian Mason

The section shows a close-packed mass of chondrules and chondrule fragments with a small amount of dark fine-grained matrix. Chondrules range from 0.3 to 1.5 mm in diameter, and show a diversity of type, the commonest being granular olivine and olivine-pyroxene, barred olivine, and fine-grained pyroxene. Transparent pale brown glass is present in some of the granular chondrules. Much of the pyroxene is polysynthetically twinned clinobronzite. Weathering is extensive, with brown limonitic staining throughout the section. Microprobe analyses show olivine and pyroxene have highly variable composition: olivine, Fa0.5-Fa35, mean Fa14; pyroxene, Fs5-Fs30, mean Fs14. The meteorite is tentatively classified as a C3V chondrite.

Data from:
  MB76
  Table 2
  Line 523:
Origin or pseudonym:Main icefield
Mass (g):3.6
Class:L3
Weathering grade:B
Fayalite (mol%):1-35
Ferrosilite (mol%):5-30
Comments:77011 pairing group
Catalogs:
Search for specimens in the Smithsonian Institution collection (U.S.):   
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References: Published in Antarctic Meteorite Newsletter 5(1) (1982), 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° 41' 27"S, 159° 22' 21"E)
Note: the NHM and MetBase coordinates are 8.1 km apart

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