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| Allan Hills A78251 | |||||||||||||||||||||
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| Basic information | Name: Allan Hills A78251 This is an OFFICIAL meteorite name. Abbreviation: ALHA78251 This meteorite may also be called Allan Hills 78251 (ALH 78251) in publications. Observed fall: No Year found: 1978 Country: Antarctica [Collected jointly by ANSMET (US) and NIPR (Japan)] Mass:  1312 g | ||||||||||||||||||||
| Classification history: |
This is 1 of 12780 approved meteorites (plus 11 unapproved names) classified as L6. [show all] Search for other: L chondrites, L 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.: ALHA78251 Location: Allan Hills Field No.: Allan Camp #1 Weight (gms): 1312.0 Meteorite Type: L6 Chondrite
Physical Description: The exterior of the sample is rough and irregular and macroscopically appears similar to ALHA77105. The sample is completely devoid of fusion crust. A small piece of material has been removed from the S surface, revealing a fine grained, greenish-gray interior. Metallic particles are apparent in the interior of the sample, and some oxidation of these has occurred. Oxidation haloes around metallic particles (1-10%) are also apparent on the sawed surfaces of the sample. Several fractures are apparent with iron oxidation along their margins. Dimensions: 12 x 7.5 x 10 cm.
Petrographic Description: Brian Mason Chondrules are sparse and poorly defined, merging with the granular groundmass, which consists mainly of olivine and pyroxene, with minor amounts of plagioclase nickel-iron, and troilite, and accessory chromite. Limonitic staining is prominent around the nickel-iron grains. Microprobe analyses show olivine (Fa23), orthopyroxene (Fs20), and plagioclase (An10) of uniform composition. The meteorite is classified as an L6 chondrite. | ||||||||||||||||||||
| Data from: MB76 Table 2 Line 431: |
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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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