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| Allan Hills A77287 | |||||||||||||||||||||
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| Basic information | Name: Allan Hills A77287 This is an OFFICIAL meteorite name. Abbreviation: ALHA77287 This meteorite may also be called Allan Hills 77287 (ALH 77287) in publications. Observed fall: No Year found: 1977 or 1978 Country: Antarctica [Collected jointly by ANSMET (US) and NIPR (Japan)] Mass:  230 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 3(1):
This text was reprinted from AMN 3(1) in AMN 4(1). In some cases, it may be an updated version from the original. Sample No.: ALHA77287 Location: Allan Hills Field No.: Y78010503 Weight (gms): 230.1 Meteorite Type: H5 Chondrite
Physical Description: Small patches of remnant fusion crust remain on the T and B surfaces of the specimen. The remaining surfaces are smooth and are weathered a reddish-brown. Small areas of the exterior surface have an iridescent sheen. No unweathered material was exposed during the processing of the sample.
Petrographic Description: Brian Mason Chondritic structure not prominent, the chondrules tending to merge with the granular groundmass, which consists of olivine and pyroxene with minor amounts of nickel-iron and troilite. The section is extensively veined with brown limonite. Microprobe analyses show olivine (Fa18) and pyroxene (Fs16) of uniform composition; a little fine-grained plagioclase (An11) and one grain of merrillite were also identified. The meteorite is classified as an H5 chondrite. | ||||||||||||||||||||
| Data from: MB76 Table 2 Line 237: |
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| References: | Published in Antarctic Meteorite Newsletter 3(1) (1980), 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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