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| Allan Hills A81316 | |||||||||||||||||||||
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| Basic information | Name: Allan Hills A81316 This is an OFFICIAL meteorite name. Abbreviation: ALHA81316 This meteorite may also be called Allan Hills 81316 (ALH 81316) in publications. Observed fall: No Year found: 1981 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  0.7 g | ||||||||||||||||||||
| Classification history: |
This is 1 of 390 approved meteorites classified as LL4. [show all] Search for other: LL chondrites, LL chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||
| Writeup |
Writeup from AMN 9(1):
Sample No.: ALHA81316 Location: Allan Hills Weight (g): 0.7 Field No.: 1647 Dimensions (cm): 1 x 1 x 0.5 Meteorite Type: LL4 Chondrite
Macroscopic Description: Carol Schwarz Stone was originally grouped in the field with seven other fragments that comprise ALHA81047. This individual fragment has a different classification from the other fragment that was classified and has been renumbered ALHA81316. This specimen is gray and contains small chondrules.
Thin Section (,1) Description: Brian Mason The small section (0.5 x 1.2 cm) shows a few relatively large chondrules (up to 3.6 mm across) in a finely granular groundmass consisting largely of olivine and pyroxene, with a small amount of nickel-iron and sulfide. Some of the pyroxene is polysynthetically twinned clinobronzite. A little brown limonite is present, but otherwise the meteorite appears relatively unweathered. Microprobe analyses give the following compositions: olivine, Fa29; pyroxene, Fs23. The meteorite is classified as an LL4 chondrite. | ||||||||||||||||||||
| Data from: MB76 Table 2 Line 837: |
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| References: | Published in Antarctic Meteorite Newsletter 9(1) (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 44048 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
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