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| Allan Hills A77183 | |||||||||||||||||||||||||
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| Basic information | Name: Allan Hills A77183 This is an OFFICIAL meteorite name. Abbreviation: ALHA77183 This meteorite may also be called Allan Hills 77183 (ALH 77183) in publications. Observed fall: No Year found: 1977 or 1978 Country: Antarctica [Collected jointly by ANSMET (US) and NIPR (Japan)] Mass:  288 g | ||||||||||||||||||||||||
| Classification history: |
This is 1 of 6438 approved meteorites (plus 5 unapproved names) classified as H6. [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.: ALHA77183 Location: Allan Hills Field No.: Y78010314 Weight (gms): 288.0 Meteorite Type: H6 Chondrite
Physical Description: This is a well rounded specimen, with the exception of the B surface which is flat. No fusion crust is present on the sample, and all surfaces are stained uniformly reddish-brown. Outlines of small inclusions are visible on the T surface. No unweathered material was observed when the stone was cleaved.
Petrographic Description: Brian Mason Some well-defined chondrules are present, but most of the section consists of a granular aggregate of olivine and pyroxene, with minor amounts of plagioclase, nickel-iron, and troilite. A little limonite is present, usually in association with the nickel-iron. Microprobe analyses show olivine (Fa19), orthopyroxene (Fs16), and plagioclase (An11) of uniform composition. The meteorite is classified as an H6 chondrite. | ||||||||||||||||||||||||
| Data from: MB76 Table 2 Line 147: |
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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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