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| Allan Hills A81107 | |||||||||||||||||||||
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| Basic information | Name: Allan Hills A81107 This is an OFFICIAL meteorite name. Abbreviation: ALHA81107 This meteorite may also be called Allan Hills 81107 (ALH 81107) in publications. Observed fall: No Year found: 1981 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  139.6 g | ||||||||||||||||||||
| Classification history: |
This is 1 of 12780 approved meteorites (plus 11 unapproved names) classified as L6. [show all] Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||
| Writeup |
Writeup from AMN 6(2):
Sample No.: ALHA81107 Location: Allan Hills Field No.: 1438 Weight (gms): 139.6 Meteorite Type: L6 Chondrite
Physical Description: Roberta Score No fusion crust remain typical equilibrated L-type chondrite. It is a rounded specimen with a light to medium gray interior. A discontinuous weathering rind of up to 0.5 cm is present. Dimensions: 6 x 4.5 x 3 cm
Petrographic Description: Brian Mason Chondrules are few and poorly defined, their margins merging with the granular groundmass, which consists largely of olivine and pyroxene, with minor amounts of plagioclase, nickel-iron, and troilite. Weathering is minor, being limited to brown limonitic staining around metal grains. Microprobe analyses gave the following results: olivine, Fa24, orthopyroxene, Fs21; plagioclase, An11; one grain of diopside, Wo46En47Fs7 was identified. "The meteorite is an L6 chondrite. | ||||||||||||||||||||
| Data from: MB76 Table 2 Line 630: |
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| References: | Published in Antarctic Meteorite Newsletter 6(2) (1983), 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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