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| Allan Hills A81119 | |||||||||||||||||||||
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| Basic information | Name: Allan Hills A81119 This is an OFFICIAL meteorite name. Abbreviation: ALHA81119 This meteorite may also be called Allan Hills 81119 (ALH 81119) in publications. Observed fall: No Year found: 1981 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  107.4 g | ||||||||||||||||||||
| Classification history: |
This is 1 of 2013 approved meteorites (plus 4 unapproved names) classified as L4. [show all] Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||
| Writeup |
Writeup from AMN 6(2):
Sample No.: ALHA81119 Location: Allan Hills Field No.: 1283 Weight (gms): 107.4 Meteorite Type: L4 Chondrite
Physical Description: Roberta Score ALHA81119 is not a complete specimen. One-side of this meteorite is rounded and has thin black fusion crust while the opposite side is flat, greenish in color and clast-rich. Several troilite grains are present on the surface. The interior matrix is medium-gray with scattered areas of heavy oxidation. Dimensions: 6.5 x 4.5 x 2 cm
Petrographic Description: Brian Mason rules are abundant and varied in texture, and are set in a fine-grained granular groundmass consisting largely of olivine and pyroxene. Some of the pyroxene is polysynthetically twinned clinobronzite. Minor subequal amounts of nickel-iron and troilite are present, in grains up to 0.5 mm across. Minor weathering is indicated by brown limonitic staining around metal grains. Microprobe analyses gave the following results: olivine, Fa24; Pyroxene, Fs21. The meteorite is classified as an L4 chondrite. | ||||||||||||||||||||
| Data from: MB76 Table 2 Line 642: |
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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:
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Statistics: This is 1 of 43856 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
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