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| Allan Hills A79011 | |||||||||||||||||||||
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| Basic information | Name: Allan Hills A79011 This is an OFFICIAL meteorite name. Abbreviation: ALHA79011 This meteorite may also be called Allan Hills 79011 (ALH 79011) in publications. Observed fall: No Year found: 1979 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  14 g | ||||||||||||||||||||
| Classification history: |
This is 1 of 11150 approved meteorites (plus 22 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.: ALHA79011 Location: Allan Hills Field No.: 1150 Weight (gms): 14.0 Meteorite Type: H5 Chondrite
Physical Description: Roberta Score This rounded stone is totally covered with weathered dull brown and black fusion crust. The interior is mostly weathered but some light gray colored matrix is visible which contains several weathered rounded inclusions (<1 mm diameter). Dimensions: 2 x 2 x 1.5 cm.
Petrographic Description: Brian Mason Chondritic structure is fairly well-developed, but the chondrules are small, ranging up to 0.6 mm across. They are set in a fine- to medium-grained matrix, which consists largely of olivine and pyroxene, with minor amounts of nickel-iron and troilite. Fusion crust, up to 0.5 mm thick, rims part of the section. Some limonitic staining is present, mainly in association with nickel-iron grains. Microprobe analyses gave the following mineral compositions: olivine, Fa18; pyroxene, Fs16. Accessory merrillite was identified with the microprobe. The meteorite is classified as an H5 chondrite. | ||||||||||||||||||||
| Data from: MB76 Table 2 Line 449: |
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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 43856 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
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