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| Allan Hills 82104 | |||||||||||||||||||||
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| Basic information | Name: Allan Hills 82104 This is an OFFICIAL meteorite name. Abbreviation: ALH 82104 Observed fall: No Year found: 1982 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  399 g | ||||||||||||||||||||
| Classification history: |
This is 1 of 8604 approved meteorites (plus 4 unapproved names) classified as L5. [show all] Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||
| Writeup |
Writeup from AMN 7(1):
Sample No.: ALH82104 Location: Allan Hills Field No.: 2993 Weight (gms): 398.8 Meteorite Type: L5 Chondrite
Physical Description: Roberta Score ALH82104 is Mostly covered with thin black fusion crust. Areas not covered are brown in color and rough in texture. The stone's interior is made up of light gray matrix with rounded and irregular shaped inclusions. A few oxidation halos are present as is a continuous weathering rind. Dimensions: 6 x 6 x 6 cm
Petrographic Description: Brian Mason Chondrules are moderately abundant, but some of them are poorly defined and tend to merge with the granular groundmass, which consists largely of olivine and pyroxene, with minor amounts of nickel-iron and troilite. Weathering is minor, being limited to brown limonitic staining around metal grains. Microprobe analyses give the following compositions: olivine, Fa25; pyroxene, Fs21. The meteorite is an L5 chondrite. | ||||||||||||||||||||
| Data from: MB76 Table 2 Line 843: |
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| References: | Published in Antarctic Meteorite Newsletter 7(1) (1984), 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 43856 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
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