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| Allan Hills A78110 | |||||||||||||||||||||||||
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| Basic information | Name: Allan Hills A78110 This is an OFFICIAL meteorite name. Abbreviation: ALHA78110 This meteorite may also be called Allan Hills 78110 (ALH 78110) in publications. Observed fall: No Year found: 1978 Country: Antarctica [Collected jointly by ANSMET (US) and NIPR (Japan)] Mass:  160.7 g | ||||||||||||||||||||||||
| Classification history: |
This is 1 of 11077 approved meteorites (plus 22 unapproved names) classified as H5. [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.: ALHA78110 Location: Allan Hills No.: 499 Weight (gms): 160.7 Meteorite Type: H5 Chondrite Physical Description: All but the B surface of the sample (7.0 x 5.0 x 2.5 cm.) is covered with a thin, patchy, black fusion crust. Small rounded and irregular inclusions are visible through the fusion crust. The B surface of the sample is weathered and stained reddish-brown by iron-oxidation and has two chondrules protruding from the surface. Several fractures penetrate the sample. The matrix of the sample is reddish-brown and has many inclusions and chondrules (as great as 2 mm in diameter) as well as metallic fragments.
Petrographic Description: Brian Mason Chondritic structure is well developed, with chondrules ranging from 0.3-1.4 mm across; a variety of types is present, the commonest being granular olivine and olivine-pyroxene, porphyritic olivine, and fine-grained pyroxene. The groundmass consists largely of fine-grained olivine and pyroxene, with minor amounts of nickel-iron and troilite. A considerable amount of brown limonite is present, generally in association with the metal grains. Microprobe analyses give the following compositions: olivine, Fa18; orthopyroxene, Fs16; plagioclase, An13. The meteorite is classified as an H5 chondrite. | ||||||||||||||||||||||||
| Data from: MB76 Table 2 Line 334: |
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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 43840 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||||||
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