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| Allan Hills A80131 | |||||||||||||||||||||
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| Basic information | Name: Allan Hills A80131 This is an OFFICIAL meteorite name. Abbreviation: ALHA80131 This meteorite may also be called Allan Hills 80131 (ALH 80131) in publications. Observed fall: No Year found: 1980 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  19.8 g | ||||||||||||||||||||
| Classification history: |
This is 1 of 6009 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 5(1):
Sample No.: ALHA80131 Location: Allan Hills Field No.: 1012 Weight (gms): 19.8 Meteorite Type: H4 Chondrite
Physical Description: Roberta Score This sample consists of two fragments almost totally covered with fusion crust. Areas devoid of fusion crust expose rounded inclusions in moderately weathered material. Chipping exposed a weathering rind and medium gray matrix with scattered light and dark inclusions.
Petrographic Description: Brian Mason Chondritic structure is well developed, with chondrules ranging up to 1.2 mm in diameter. The matrix consists of fine-grained olivine and pyroxene, with minor amounts of nickel-iron and troilite. Weathering is extensive, with brown limonitic staining throughout the section and veinlets and patches of red-brown limonite. Microprobe analyses gave the following compositions: olivine, Fa19; pyroxene, mean Fs18, range Fs16-22. The meteorite is classified as an H4 chondrite. | ||||||||||||||||||||
| Data from: MB76 Table 2 Line 521: |
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| References: | Published in Antarctic Meteorite Newsletter 5(1) (1982), 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 40756 approved meteorites from Antarctica (plus 4494 unapproved names) | ||||||||||||||||||||
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