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Allan Hills A78115 | |||||||||||||||||||||||||
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Basic information | Name: Allan Hills A78115 This is an OFFICIAL meteorite name. Abbreviation: ALHA78115 This meteorite may also be called Allan Hills 78115 (ALH 78115) in publications. Observed fall: No Year found: 1978 Country: Antarctica [Collected jointly by ANSMET (US) and NIPR (Japan)] Mass: 848 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 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.: ALHA78115 Location: Allan Hills Field No.: 294 Weight (gms): 847.6 Meteorite Type: H6 Chondrite
Physical Description: This sample is smooth and rounded. There is scattered fusion crust on the B and E surfaces, and a very small amount on the W surface. The fusion crust is black, thin and pitted. Where the sample is devoid of fusion crust it is smooth and weathered a reddish-brown. Clasts and chondrules, as much as 9 mm. in diameter, are present. It appears that one corner on the N surface has been broken off, but the surface is weathered and stained similar to the remainder of the sample. The interior of the meteorite, exposed during processing, contains metallic particles and is moderately weathered.
Petrographic Description: Brian Mason A few ill-defined chondrules are present. Most of the section shows a granular aggregate consisting largely of olivine and pyroxene, with minor amounts of plagioclase, nickel-iron, and troilite (nickel-iron in excess of troilite). Grains of brown limonite are present throughout the section, and are concentrated below remnants of fusion crust along one edge. Microprobe analyses give the following compositions: olivine Fa18; pyroxene, Fs16; plagioclase, An12. The meteorite is an H6 chondrite. | ||||||||||||||||||||||||
Data from: MB76 Table 2 Line 339: |
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Catalogs: |
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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: |
Statistics: This is 1 of 44400 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||||||
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Revision history: |
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