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| Allan Hills A81010 | |||||||||||||||||||||
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| Basic information | Name: Allan Hills A81010 This is an OFFICIAL meteorite name. Abbreviation: ALHA81010 This meteorite may also be called Allan Hills 81010 (ALH 81010) in publications. Observed fall: No Year found: 1981 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  219 g | ||||||||||||||||||||
| Classification history: |
This is 1 of 409 approved meteorites classified as Eucrite-pmict. [show all] Search for other: Achondrites, Eucrites, and HED achondrites | ||||||||||||||||||||
| Writeup |
Writeup from AMN 6(1):
Sample No.: ALHA81010 Location: Allan Hills Field No.: 1673 Weight (gms): 219.1 Meteorite Type: Polymict Eucrite
Physical Description: Roberta Score Fusion crust totally covers ALHA81010. This achondrite is probably from the same fall as the other polymict eucrites found in Allan Hills area. Dimensions: 8 x 5 x 5.5 cm.
Petrographic Description: Brian Mason The meteorite is a microbreccia consisting largely of angular monomineralic pyroxene and plagioclase clasts up to 4 mm in maximum dimension, and a few lithic clasts, in a matrix of comminuted pyroxene and plagioclase. Transparent brown fusion crust rims part of the section. The pyroxene is light to dark brown pigeonite; a few grains show exsolution lamellae. The lithic clasts have a maximum dimension of 3 mm, and consist of pigeonite and plagioclase with ophitic and gabbroic textures; one clast consists of angular pigeonite and plagioclase grains in a semi-opaque glassy matrix. Microprobe analyses show pigeonite and augite with a wide range of compositions: Wo5-36, En26-61, Fs31-57; plagioclase composition range is An78-93, mean An88. The meteorite is classified as a polymict eucrite, and is probably paired with ALHA81006, 81007, and 81008. | ||||||||||||||||||||
| Data from: MB76 Table 2 Line 533: |
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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 44547 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
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