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Allan Hills 85002
Basic information Name: Allan Hills 85002
     This is an OFFICIAL meteorite name.
Abbreviation: ALH 85002
Observed fall: No
Year found: 1985
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 438 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 9(3)  (1986)  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 105 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
Writeuphelp
Writeup from AMN 9(3):

Sample No.: ALH85002

Location: Allan Hills

Weight (g): 437.7

Field No.: 2219

Dimensions (cm): 8 x 7 x 5

Meteorite Type: C4 Chondrite

 

Macroscopic Description: René Martinez

Approximately 80% of the exterior is covered with reddish-brown, polygonally fractured fusion crust. The interior is light gray with dark rounded inclusions as large as 1 mm and white irregular-shaped inclusions as large as 3 mm in longest dimension.

 

Thin Section (,4) 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. The section is rimmed with fusion crust along one edge. Micro-probe analyses give the following compositions: olivine, Fa29; pyroxene, Fs26; plagioclase, An54-59. The meteorite is a C4 chondrite and closely resembles ALH82135; the possibility of pairing should be considered.

Data from:
  MB76
  Table 2
  Line 1231:
Origin or pseudonym:Far Western
Mass (g):437.7
Class:CK4
Weathering grade:A
Fayalite (mol%):30
Ferrosilite (mol%):26
Comments:26Al=39±2; NTL=<1; 82135 pairing group
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 9(3) (1986), 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° 55' 0"S, 156° 31' 55"E)
Note: the NHM and MetBase coordinates are 82.9 km apart

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