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| Allan Hills A81042 | |||||||||||||||||||||
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| Basic information | Name: Allan Hills A81042 This is an OFFICIAL meteorite name. Abbreviation: ALHA81042 This meteorite may also be called Allan Hills 81042 (ALH 81042) in publications. Observed fall: No Year found: 1981 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  534 g | ||||||||||||||||||||
| Classification history: |
This is 1 of 11567 approved meteorites (plus 23 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 6(1):
Sample No.: ALHA81042 Location: Allan Hills Field No.: 1640 Weight (gms): 534.4 Meteorite Type: H5 Chondrite
Physical Description: Carol Schwarz This specimen has patchy fusion crust on its shiny red-brown exterior. It is extensively fractured. The interior appears to be totally weathered. Dimensions: 10 x 7 x 5 cm.
Petrographic Description: Brian Mason Chondrules are fairly abundant, but their margins are diffuse, tending to merge with the granular groundmass, which consists largely of olivine and pyroxene with minor amounts of nickel-iron and troilite. Weathering is extensive, with brown limonitic staining and veinlets throughout the section. Microprobe analyses give the following compositions: olivine, Fa19; orthopyroxene, Fs17. The meteorite is classified as an H5 chondrite. | ||||||||||||||||||||
| Data from: MB76 Table 2 Line 565: |
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| References: | Published in Antarctic Meteorite Newsletter 6(1) (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 44543 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
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| Revision history: |
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