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| Allan Hills 84086 | |||||||||||||||||||||||||
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| Basic information | Name: Allan Hills 84086 This is an OFFICIAL meteorite name. Abbreviation: ALH 84086 Observed fall: No Year found: 1984 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  234 g | ||||||||||||||||||||||||
| Classification history: |
This is 1 of 69 approved meteorites classified as L3.8. [show all] Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||||||
| Writeup |
Writeup from AMN 9(3):
Sample No.: ALH84086 Location: Allan Hills Weight (g): 234.0 Field No.: 1569 Dimensions (cm): 9 x 5 x 3.5 Meteorite Type: LL3 Chondrite
Macroscopic Description: Roberta Score Fusion crust covers most of this chondrite. Abundant inclusions, both chondrules and clasts, are contained in the medium gray-colored matrix. One light-colored clast visible on the exterior is 0.7 x 0.9 cm in dimension. Oxidation is minor.
Thin Section (,3) Description: Brian Mason The section shows a close-packed aggregate of chondrules, chondrule fragments, and irregular inclusions up to 3 mm across, with a few grains of nickel-iron and sulfide and hardly any matrix. A considerable variety of chondrules is present, the commonest being porphyritic olivine and granular olivine with or without polysynthetically twinned clinopyroxene. Some chondrules have intergranular, transparent pale brown glass; in others the glass is turbid and partly devitrified. Microprobe analyses show a moderate range in the composition of olivine (Fa25-29), and a wider range in pyroxene (Fs17-26). This range in composition, and the presence of glass and twinned clinopyroxene, indicates type 3, and the olivine composition is characteristic of the LL group; the meteorite is therefore classified as an LL3 chondrite. | ||||||||||||||||||||||||
| Data from: MB76 Table 2 Line 1051: |
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| References: | Published in Antarctic Meteorite Newsletter 9(3) (1986), 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 44543 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||||||
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| Revision history: |
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