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| Allan Hills A79009 | |||||||||||||||||||||
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| Basic information | Name: Allan Hills A79009 This is an OFFICIAL meteorite name. Abbreviation: ALHA79009 This meteorite may also be called Allan Hills 79009 (ALH 79009) in publications. Observed fall: No Year found: 1979 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  75.7 g | ||||||||||||||||||||
| Classification history: |
This is 1 of 11077 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.: ALHA79009 Location: Allan Hills Field No.: 1152 Weight (gms): 75.7 Meteorite Type: H5 Chondrite
Physical Description: Roberta Score Stone is totally covered with iridescent brown and dull black fusion crust. Most of the interior of the stone has been weathered to a deep reddish-brown color. Some white evaporite deposit was noted just under the fusion crust. Dimensions: 5 x 4 x 3 cm.
Petrographic Description: Brian Mason Chondritic structure is moderately well developed, with chondrules ranging from 0.4-1.5 mm in diameter. The matrix consists mainly of granular olivine and pyroxene, with minor amounts of nickel-iron and troilite. Weathering is extensive, with veins of limonite throughout the section. Fusion crust rims one edge of the section. Microprobe analyses show olivine (Fa18) and pyroxene (Fs15) of uniform composition. The meteorite is classified as an H5 chondrite. | ||||||||||||||||||||
| Data from: MB76 Table 2 Line 447: |
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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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Statistics: This is 1 of 43840 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
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