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| Allan Hills A79021 | |||||||||||||||||||||
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| Basic information | Name: Allan Hills A79021 This is an OFFICIAL meteorite name. Abbreviation: ALHA79021 This meteorite may also be called Allan Hills 79021 (ALH 79021) in publications. Observed fall: No Year found: 1979 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  29.4 g | ||||||||||||||||||||
| Classification history: |
This is 1 of 11567 approved meteorites (plus 23 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.: ALHA79021 Location: Allan Hills Field No.: 1192 Weight (gms): 29.4 Meteorite Type: H5 Chondrite
Physical Description: Roberta Score Stone is mostly covered with dull black fusion crust. The interior is light gray in color with reddish-brown oxidation scattered throughout. Inclusions are apparent. Dimensions: 4.5 x 2 x 1.5 cm.
Petrographic Description: Brian Mason Chondritic structure is moderately well-developed, chondrules ranging up to 1.5 mm in diameter. The groundmass consists largely of granular olivine and pyroxene, with minor amounts of nickel-iron and troilite. Limonitic staining is present around the nickel-iron grains. One edge of the section is rimmed with fusion crust. Microprobe analyses gave the following compositions: olivine, Fa18; pyroxene, Fs17. The meteorite is classified as an H5 chondrite. | ||||||||||||||||||||
| Data from: MB76 Table 2 Line 459: |
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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 44543 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
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| Revision history: |
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