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Allan Hills A81112 | |||||||||||||||||||||
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Basic information | Name: Allan Hills A81112 This is an OFFICIAL meteorite name. Abbreviation: ALHA81112 This meteorite may also be called Allan Hills 81112 (ALH 81112) in publications. Observed fall: No Year found: 1981 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass: 150.3 g | ||||||||||||||||||||
Classification history: |
This is 1 of 6775 approved meteorites (plus 6 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 6(2):
Sample No.: ALHA81112 Location: Allan Hills Field No.: 1550 Weight (gms): 150.3 Meteorite Type: H6 Chondrite
Physical Description: Carol Schwarz Dull black fusion crust covers most of this sample. The other surfaces are dark brown with several light inclusions visible. The interior exposed in chipping is a red brown color. Dimensions: 5 x 5 x 3.5 cm
Petrographic Description: Brian Mason The section shows a granular aggregate of olivine and pyroxene, with minor amounts of nickel-iron, troilite, and plagioclase, with a few poorly defined chondrules. Weathering is extensive, with veins and small areas of brown limonite throughout. Remnants of fusion crust, up to 0.5 mm thick, rim the section. Microprobe analyses gave the following results: olivine, Fa19; orthopyroxene, Fs17; plagioclase, An12. The meteorite is an H6 chondrite. | ||||||||||||||||||||
Data from: MB76 Table 2 Line 635: |
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Catalogs: |
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References: | Published in Antarctic Meteorite Newsletter 6(2) (1983), JSC, Houston Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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Geography: |
Statistics: This is 1 of 44400 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
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Revision history: |
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