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| Allan Hills A81111 | |||||||||||||||||||||
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| Basic information | Name: Allan Hills A81111 This is an OFFICIAL meteorite name. Abbreviation: ALHA81111 This meteorite may also be called Allan Hills 81111 (ALH 81111) in publications. Observed fall: No Year found: 1981 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  210 g | ||||||||||||||||||||
| Classification history: |
This is 1 of 6825 approved meteorites (plus 6 unapproved names) classified as H6. [show all] Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||
| Writeup |
Writeup from AMN 6(1):
Sample No.: ALHA81111 Location: Allan Hills Field No.: 1431 Weight (gms): 210.3 Meteorite Type: H6 Chondrite
Physical Description: Roberta Score The top half of ALHA81111 is covered with frothy black fusion crust while the remainder of the specimen is iridescent reddish-brown. Several cracks penetrate the interior. Chipping exposed only a small area of relatively unweathered material which is a very dark gray color. Dimensions: 8 x 4 x 6 cm.
Petrographic Description: Brian Mason Chondrules are moderately abundant but their margins are diffuse, tending to merge with the granular groundmass, which consists of olivine and pyroxene with minor amounts of nickel-iron, troilite, and plagioclase. Limonitic staining and small areas of limonite are present, mainly in association with metal grains. Microprobe analyses give the following compositions: olivine, Fa19; orthopyroxene, Fs17; plagioclase, An13. The meteorite is an H6 chondrite. | ||||||||||||||||||||
| Data from: MB76 Table 2 Line 634: |
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| References: | Published in Antarctic Meteorite Newsletter 6(1) (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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| Revision history: |
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