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| Allan Hills A77292 | |||||||||||||||||||||
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| Basic information | Name: Allan Hills A77292 This is an OFFICIAL meteorite name. Abbreviation: ALHA77292 This meteorite may also be called Allan Hills 77292 (ALH 77292) in publications. Observed fall: No Year found: 1977 or 1978 Country: Antarctica [Collected jointly by ANSMET (US) and NIPR (Japan)] Mass:  199.6 g | ||||||||||||||||||||
| Classification history: |
This is 1 of 12222 approved meteorites (plus 7 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.: ALHA77292 Location: Allan Hills Field No.: 78010211A Weight (gms): 199.6 Meteorite Type: L6 Chondrite
Physical Description: This is not a complete specimen. The T surface is less severely weathered than any of the remaining surfaces. The N surface has remnants of dull black fusion crust. The surfaces devoid of fusion crust are stained reddish-brown by iron oxidation and are rough. On fractured surfaces it appears as if rounded and irregular inclusions are present in the sample. This sample appears macroscopically similar to ALHA77180, 218, 267, 292 and 301.
Petrographic Description: Brian Mason Chondrules are sparse and poorly defined, their margins tending to merge with the granular groundmass, which consists of olivine and pyroxene, with minor amounts of plagioclase, nickel-iron and troilite. The nickel-iron grains show a small amount of limonitic alteration. Microprobe analyses show olivine (Fa24), orthopyroxene (Fs20), and plagioclase (An10) of uniform composition. The meteorite is classified as an L6 chondrite. | ||||||||||||||||||||
| Data from: MB76 Table 2 Line 242: |
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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 43700 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
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