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Allan Hills A79020 | |||||||||||||||||||||
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Basic information | Name: Allan Hills A79020 This is an OFFICIAL meteorite name. Abbreviation: ALHA79020 This meteorite may also be called Allan Hills 79020 (ALH 79020) in publications. Observed fall: No Year found: 1979 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass: 4.2 g | ||||||||||||||||||||
Classification history: |
This is 1 of 6775 approved meteorites (plus 6 unapproved names) classified as H6. [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.: ALHA79020 Location: Allan Hills Field No.: 1186 Weight (gms): 4.2 Meteorite Type: H6 Chondrite
physical Description: Roberta Score Most of the stone is covered with dull brown and black fusion crust. Areas devoid of fusion crust range in color from yellow to reddish-brown. In these areas, inclusions are visible. Several fractures penetrate the interior of the stone. Dimensions: 2 x 1.5 x 1 cm.
Petrographic Description: Brian Mason Chondritic structure is poorly developed, the sparse chondrules tending to merge with the granular groundmass, which consists largely of olivine and pyroxene, with minor amounts of plagioclase, nickel-iron, and troilite. Remnants of fusion crust rim much of the section. A moderate amount of limonitic staining is present around the nickel-iron grains. Microprobe analyses gave the following mineral compositions: olivine, Fa17; pyroxene, Fs15; plagioclase, An14. The meteorite is classified as an H6 chondrite. | ||||||||||||||||||||
Data from: MB76 Table 2 Line 458: |
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Catalogs: |
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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: |
Statistics: This is 1 of 44400 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
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Revision history: |
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