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| Allan Hills A81103 | |||||||||||||||||||||
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| Basic information | Name: Allan Hills A81103 This is an OFFICIAL meteorite name. Abbreviation: ALHA81103 This meteorite may also be called Allan Hills 81103 (ALH 81103) in publications. Observed fall: No Year found: 1981 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  136.1 g | ||||||||||||||||||||
| Classification history: |
This is 1 of 6826 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 6(2):
Sample No.: ALHA81103 Location: Allan Hills Field No.: 1426 Weight (gms): 136.1 Meteorite Type: H6 Chondrite
Physical Description: Carol Schwarz The fusion crust on this stone is fractured and blistery in some areas. The other surfaces are brown and somewhat vuggy. The interior is reddish brown with one small area of grayish matrix remaining. Dimensions: 6 x 5 x 3 cm
Petrographic Description: Brian Mason Chondrules are sparse and poorly defined,. their margins merging with the groundmass, which consists largely of granular olivine and pyroxene, with minor amounts of nickel-iron, troilite, and plagioclase. Weathering is extensive, with veinlets and small areas of brown limonite throughout. Microprobe analyses gave the following compositions: olivine, Fa19; orthopyroxene Fs17; plagioclase, An12. The meteorite is an H6 chondrite; it is very similar to ALHA81112, and is possibly paired with that specimen. | ||||||||||||||||||||
| Data from: MB76 Table 2 Line 626: |
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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 44547 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
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