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Allan Hills 82135
Basic information Name: Allan Hills 82135
     This is an OFFICIAL meteorite name.
Abbreviation: ALH 82135
Observed fall: No
Year found: 1982
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 12.1 g
Antarctic Meteorite Newsletter:  AMN 7(2)  (1984)  C4
AMN 17(1)  (1994)  CK4
Meteoritical Bulletin:  MB 76  (1994)  CK4
NHM Catalogue:  5th Edition  (2000)  CK4
MetBase:  v. 7.1  (2006)  CK4
Recommended:  CK4    [explanation]

This is 1 of 126 approved meteorites classified as CK4.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (equilibrated), CK chondrites, CK chondrites (type 4-6), and CV-CK clan chondrites
Writeup from AMN 7(2):

Sample No.: ALH82135

Location: Allan Hills

Field No.: 2973

Weight (gms): 12.1

Meteorite Type: C4 Chondrite


Physical Description: Roberta Score

Black fusion crust covers most of this triangular shaped stone. When ALH82135 was broken, a massive, dark bluish-gray colored matrix was exposed. Some oxidation is present. Dimensions: 3 x 2.5 x 1 cm


Petrographic Description: Brian Mason

The section consists largely of finely granular olivine (grains ranging up to 0.1 mm), with a little pyroxene, plagioclase, and opaques (largely magnetite). A few chondrules, made up of coarser-grained olivine, are present. Microprobe analyses give the following compositions: olivine, Fa27 (a few grains have higher Fa values); pyroxene, Fs25; plagioclase, An53. This meteorite is similar to Karoonda and PCA82500 in texture and mineral compositions and is tenatively classified as a C4 chondrite.

Data from:
  Table 2
  Line 874:
Origin or pseudonym:Far Western
Mass (g):12.1
Weathering grade:A
Fayalite (mol%):27
Ferrosilite (mol%):24
Comments:82135 pairing group
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References: Published in Antarctic Meteorite Newsletter 7(2) (1984), 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' 46"S, 156° 58' 32"E)
Note: the NHM and MetBase coordinates are 71.9 km apart

     This is 1 of 44248 approved meteorites from Antarctica (plus 3802 unapproved names)
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