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| Allan Hills 84029 | |||||||||||||||||||||||||
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| Basic information | Name: Allan Hills 84029 This is an OFFICIAL meteorite name. Abbreviation: ALH 84029 Observed fall: No Year found: 1984 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  119.8 g | ||||||||||||||||||||||||
| Classification history: |
This is 1 of 636 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 8(2):
Sample No.: ALH84029 Location: Allan Hills Weight (g): 119.8 Field No.: 1534 Dimensions (cm): 5.5 x 5 x 4 Meteorite Type: C2 Chondrite
Macroscopic Description: Carol Schwarz This specimen is black and angular with smooth sides. Many fractures are present as well as some white salt deposit. The interior is black and fine-grained. The sample is similar to ALH83100.
Thin Section (,3) Description: Glenn MacPherson This meteorite resembles ALH84030, ALH84031, ALH84032, ALH84034, ALH84042, and ALH84044. All are very similar to one another and all resemble ALH83100, with which they are probably paired. Alteration is extensive and the major component is a brown to black phyllosilicate matrix that encloses green to pale brown phyllosilicate pseudomorphs of chondrules, crystals and inclusions. Calcite is abundant. Sporadic primary olivine crystals are preserved and are mostly Fa0-2, although a few as iron-rich as Fa37 were found. Chromite, pentlandite, and (?) magnetite are accessory. Chondrules and inclusions range up to a little over 1 mm in diameter. Inclusions are completely altered. This is a C2 chondrite. | ||||||||||||||||||||||||
| Data from: MB76 Table 2 Line 994: |
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| References: | Published in Antarctic Meteorite Newsletter 8(2) (1985), 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 44543 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||||||
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| Revision history: |
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