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| Allan Hills A79026 | |||||||||||||||||||||
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| Basic information | Name: Allan Hills A79026 This is an OFFICIAL meteorite name. Abbreviation: ALHA79026 This meteorite may also be called Allan Hills 79026 (ALH 79026) in publications. Observed fall: No Year found: 1979 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  572 g | ||||||||||||||||||||
| Classification history: |
This is 1 of 10254 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.: ALHA79026 Location: Allan Hills Field No.: 1056 Weight (gms): 572.0 M Meteorite Type: H5 Chondrite
Physical Description: Roberta Score The shape of this meteorite is angular with flat faces. It is covered with a very thin black to brown fusion crust., The interior material is friable and a fractured. Some fresh metal flecks are visible. The matrix is gray with oxidation haloes scattered throughout. A weathering rind from 1 to 5 mm is apparent in some areas. Dimensions: %9 x 6 x 5.5 cm.
Petrographic Description: Brian Mason Chondritic structure is moderately well-developed; most chondrules are ~1 mm in diameter, but some larger ones are present; one consisting of granular olivine with interstitial devitrified glass is 3 mm across. The matrix is fine- to medium-grained, and consists largely of olivine and pyroxene, with minor amounts of nickel-iron and troilite. Brown limonitic staining is present around the nickel-iron grains. Microprobe analyses show olivine (Fa18) and orthopyroxene (Fs16) of uniform composition; a little fine-grained plagioclase (An13) was identified with the microprobe. The meteorite is classified as an H5 chondrite. | ||||||||||||||||||||
| Data from: MB76 Table 2 Line 464: |
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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 40744 approved meteorites from Antarctica (plus 4494 unapproved names) | ||||||||||||||||||||
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