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| Allan Hills A79013 | |||||||||||||||||||||
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| Basic information | Name: Allan Hills A79013 This is an OFFICIAL meteorite name. Abbreviation: ALHA79013 This meteorite may also be called Allan Hills 79013 (ALH 79013) in publications. Observed fall: No Year found: 1979 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  28.3 g | ||||||||||||||||||||
| Classification history: |
This is 1 of 10264 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 4(1):
Sample No.: ALHA79013 Location: Allan Hills Field No.: 1167 Weight (gms): 28.3 Meteorite Type: H5 Chondrite
Physical Description: Roberta Score The exterior of the stone is totally covered with a dull fusion crust, while the interior of the stone is 95% weathered. A few inclusions are apparent in the unweathered material. Dimensions: 3 x 3 x 1.5 cm.
Petrographic Description: Brian Mason Chondritic structure is well-developed, with chondrules ranging from 0.4-1.9 mm in diameter; one large pyroxene chondrule, 3.1 mm across, was noted. The groundmass between the chondrules consists largely of granular olivine and pyroxene, with minor amounts of nickel-iron and troilite. Fusion crust, up to 0.6 mm thick, partly rims the section. Brown limonitic staining is present throughout. Microprobe analyses gave the following compositions: olivine, Fa18; pyroxene, Fs16. The meteorite is classified as an H5 chondrite. | ||||||||||||||||||||
| Data from: MB76 Table 2 Line 451: |
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| References: | Published in Antarctic Meteorite Newsletter 4(1) (1981), 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 40753 approved meteorites from Antarctica (plus 4494 unapproved names) | ||||||||||||||||||||
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