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| Allan Hills 85004 | |||||||||||||||||||||||||
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| 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:  8.4 g | ||||||||||||||||||||||||
| Classification history: |
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 |
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: |
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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:
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Statistics: This is 1 of 43857 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||||||
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