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| Allan Hills A81064 | |||||||||||||||||||||
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| Basic information | Name: Allan Hills A81064 This is an OFFICIAL meteorite name. Abbreviation: ALHA81064 This meteorite may also be called Allan Hills 81064 (ALH 81064) in publications. Observed fall: No Year found: 1981 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  191 g | ||||||||||||||||||||
| Classification history: |
This is 1 of 11150 approved meteorites (plus 22 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(2):
Sample No.: ALHA81064 Location: Allan Hills Field No.: 1135, 1139 Weight (gms): 191.0 Meteorite Type: H5 Chondrite
Physical Description: Roberta Score ALRA8104 consists of two pieces that fit together perfectly. Patches of black fusion crust are present on the exterior, with the rest of the stone being a uniform reddish-brown color. The interior is extensively weathered. Dimensions: 7.5 x 4 x 2 cm
Petrographic Description: Brian Mason Chondrules are fairly abundant, but their margins are sometimes diffuse and tend 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 limonitic staining throughout the section and some small areas of brown limonite. Microprobe analyses gave the following compositions: olivine, Fa18; pyroxene, Fs15 . The meteorite is classified as an H5 chondrite. | ||||||||||||||||||||
| Data from: MB76 Table 2 Line 587: |
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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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