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| Allan Hills A81015 | |||||||||||||||||||||
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| Basic information | Name: Allan Hills A81015 This is an OFFICIAL meteorite name. Abbreviation: ALHA81015 This meteorite may also be called Allan Hills 81015 (ALH 81015) in publications. Observed fall: No Year found: 1981 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  5.49 kg | ||||||||||||||||||||
| Classification history: |
This is 1 of 10193 approved meteorites (plus 18 unapproved names) classified as H5. [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.: ALHA81015 Location: Allan Hills Field No.: 1652 Weight (gms): 5489.0 Meteorite Type: H5 Chondrite
Physical Description: Carol Schwarz Thin fusion crust is black to brown and covers about 70% of the specimen. White deposit occurs on one face. The interior has a partial weathering rind of up to ~1 cm in width. Oxidation haloes are numerous in the matrix. Dimensions: 20 x 15 x 9.5 cm.
Petrographic Description: Brian Mason Chondritic structure is well developed, with chondrules up to 1.2 mm across, but chondrule margins tend to merge with the granular groundmass, which consists largely of olivine and pyroxene with minor amounts of nickel-iron and troilite. Veinlets of brown limonite are present near the surface, and limonitic staining is extensive around metal grains. Microprobe analyses give the following compositions: olivine, Fa19; orthopyroxene, Fs16. The meteorite is classified as an H5 chondrite. | ||||||||||||||||||||
| Data from: MB76 Table 2 Line 538: |
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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 40719 approved meteorites from Antarctica (plus 4494 unapproved names) | ||||||||||||||||||||
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