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Allan Hills 85106
Basic information Name: Allan Hills 85106
     This is an OFFICIAL meteorite name.
Abbreviation: ALH 85106
Observed fall: No
Year found: 1985
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 2.7 g
Antarctic Meteorite Newsletter:  AMN 10(2)  (1987)  C2
Meteoritical Bulletin:  MB 76  (1994)  C2
NHM Catalogue:  5th Edition  (2000)  CM2
MetBase:  v. 7.1  (2006)  CM2
Antarctic Meteorite Newsletter:  AMN 31(1)  (2008)  CM2
Recommended:  CM2    [explanation]

This is 1 of 625 approved meteorites classified as CM2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites
Writeup from AMN 10(2):

Sample No.: ALH85106

Location: Allan Hills

Weight (g): 2.7

Field No.: 2650

Dimensions (cm): 1.5 x 1.5 x 1.5

Meteorite Type: C2 Chondrite


Macroscopic Description: Roberta Score

The overall color of this weathered carbonaceous chondrite is greenish-gray. This greenish weathering extends 2 mm into the interior. The core of this stone is black and contains small white inclusions.


Thin Section (,2) Description: Brian Mason

The section shows silicate grains, irregular aggregates, and rare chondrules in a translucent to opaque matrix. Nickel-iron and sulfide are present in trace amounts. Microprobe analyses show olivine of variable composition - many grains are near Fa1, but the range is Fa0.3-30; pyroxene is rare. The meteorite is a C2 chondrite.

Data from:
  Table 2
  Line 1335:
Origin or pseudonym:Far Western
Mass (g):2.7
Weathering grade:B
Fayalite (mol%):0.3-30
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References: Published in Antarctic Meteorite Newsletter 10(2) (1987), JSC, Houston
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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     Catalogue of Meteorites:   (76° 43'S, 159° 40'E)
     Recommended::   (76° 54' 38"S, 156° 32' 5"E)
Note: the NHM and MetBase coordinates are 82.7 km apart

     This is 1 of 44048 approved meteorites from Antarctica (plus 3802 unapproved names)
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