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| Allan Hills A78048 | |||||||||||||||||||||||||
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| Basic information | Name: Allan Hills A78048 This is an OFFICIAL meteorite name. Abbreviation: ALHA78048 This meteorite may also be called Allan Hills 78048 (ALH 78048) in publications. Observed fall: No Year found: 1978 Country: Antarctica [Collected jointly by ANSMET (US) and NIPR (Japan)] Mass:  190.6 g | ||||||||||||||||||||||||
| Classification history: |
This is 1 of 11485 approved meteorites (plus 6 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(2):
This text was reprinted from AMN 3(2) in AMN 4(1). In some cases, it may be an updated version from the original. Sample No.: ALHA78048 Location: Allan Hills Field No.: 281 Weight (gms): 190.6 Meteorite Type: L6 Chondrite
Physical Description: All sides of the specimen are at least partially covered with fusion crust, that ranges in color from brown to black. In areas where the fusion crust has been removed, a light gray matrix with iron-oxidation staining is revealed. Shallow regmaglypts are present on all sides of the sample. When the sample was cleaved a thin (1-2 mm.) weathering rind was exposed. The interior of the stone was light gray with darker gray inclusions and some unoxidized metal fragments.
Petrographic Description: Brian Mason Chondrules are sparse and poorly defined, tending to merge with the granular groundmass, which consists of olivine and pyroxene, with minor amounts of plagioclase, nickel-iron, and troilite. Limonitic staining is present in association with nickel-iron grains, and some of the grains have a rim of brown limonite. Microprobe analyses show olivine (Fa24) and orthopyroxene (Fs21) of uniform composition; most of the plagioclase is stoichiometric (An11), but some is deficient in Na, suggesting partial conversion to maskelynite. The meteorite is classified as an L6 chondrite. | ||||||||||||||||||||||||
| Data from: MB76 Table 2 Line 291: |
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| References: | Published in Antarctic Meteorite Newsletter 3(2) (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 40719 approved meteorites from Antarctica (plus 4494 unapproved names) | ||||||||||||||||||||||||
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