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| Allan Hills A81041 | |||||||||||||||||||||
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| Basic information | Name: Allan Hills A81041 This is an OFFICIAL meteorite name. Abbreviation: ALHA81041 This meteorite may also be called Allan Hills 81041 (ALH 81041) in publications. Observed fall: No Year found: 1981 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  729 g | ||||||||||||||||||||
| Classification history: |
This is 1 of 5794 approved meteorites (plus 2 unapproved names) classified as H4. [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(2):
Sample Nos: ALHA81041, 81044, 81045, 81046, 81047, 81048, 81049, 81050, 81051, 81052 Location: Allan Hills Field Nos.: 1146, 1125, 1141, 1100, 1121, 1648, 1147, 1143, 1106 Combined Weight: 1600.9 Meteorite Type: H4 Chondrite
Physical. Description: Roberta Score These ten samples represent 31 specimens which may be paired. Small bits of fusion crust are present on a couple of the stones. Most are extensive weathered inside and out.
Petrographic Description: Brian Mason Chondrules are abundant, and are set in a granular groundmass of olivine and pyroxene, with minor amounts of nickel-iron and troilite. Some of the pyroxene is polysynthetically twinned clinobronzite. Brown limonitic staining pervades the section. Microprobe analyses gave the following compositions: olivine, Fa18; pyroxene somewhat variable, Fs15-23, mean Fs18. The meteorite is classified as an H4 chondrite.
The sections of ALHA81043, 81044, 81045, 81046, 81047, 81048, 81049, 81050, 81051, and 81052 are very similar to that of ALHA81041, which suggests that some or all of these meteorites may be paired. | ||||||||||||||||||||
| Data from: MB76 Table 2 Line 564: |
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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 39179 approved meteorites from Antarctica (plus 5051 unapproved names) | ||||||||||||||||||||
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