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Allan Hills 85004
Basic information Name: Allan Hills 85004
     This is an OFFICIAL meteorite name.
Abbreviation: ALH 85004
Observed fall: No
Year found: 1985
Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)]
Mass:help 8.4 g
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 10(1)  (1987)  C2
AMN 17(1)  (1994)  CM2
Meteoritical Bulletin:  MB 76  (1994)  CM2
NHM Catalogue:  5th Edition  (2000)  CM2
MetBase:  v. 7.1  (2006)  CM2
Recommended:  CM2    [explanation]

This is 1 of 533 approved meteorites classified as CM2.   [show all]
Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites
Writeuphelp
Writeup from AMN 10(1):

Sample No.: ALH85004

Location: Allan Hills

Weight (g): 8.4

Field No.: 2298

Dimensions (cm): ten pieces

Meteorite Type: C2 Chondrite

 

Macroscopic Description: René Martinez

ALH85004 consists of ten fragments plus many fines. All fragments are black and fine-grained.

 

Thin Section (,3) Description: Brian Mason

The thin section shows small chondrules, irregular aggregates, and mineral grains in a dark brown to black matrix. Practically all the chondrules, aggregates, and mineral grains consist of pale green isotropic serpentinous material; a few grains of calcite were identified. The meteorite is a C2 chondrite; the extreme degree of serpentinization is reminiscent of ALH83100.

Data from:
  MB76
  Table 2
  Line 1233:
Origin or pseudonym:Far Western
Mass (g):8.4
Class:CM2
Weathering grade:B
Comments:83100 pairing group
Catalogs:
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References: Published in Antarctic Meteorite Newsletter 10(1) (1987), 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::   (77° 2' 6"S, 157° 10' 51"E)
Note: the NHM and MetBase coordinates are 72.4 km apart

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