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| Allan Hills A81019 | |||||||||||||||||||||
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| Basic information | Name: Allan Hills A81019 This is an OFFICIAL meteorite name. Abbreviation: ALHA81019 This meteorite may also be called Allan Hills 81019 (ALH 81019) in publications. Observed fall: No Year found: 1981 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  1051 g | ||||||||||||||||||||
| Classification history: |
This is 1 of 11568 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.: ALHA81019 Location: Allan Hills Field No.: 1428 Weight (gms): 1051.2 Meteorite Type: H5 Chondrite
Physical Description: Carol Schwarz This specimen is rectangular shaped with thin patchy black fusion crust covering about 65% of its surface. Where the fusion crust is absent the surface is smooth and reddish-brown in color with no features distinguishable. There is a deep fracture penetrating the stone, dividing it into two halves. A small amount of white deposit has formed on the top surface. The interior is dark reddish-brown with several small areas which are not completely weathered. Dimensions: 9 x 7 x 6.5 cm.
Petrographic Description: Brian Mason Chondrules are present but are poorly defined, their margins merging with the granular groundmass, which consists largely of olivine and pyroxene with minor amounts of nickel-iron and troilite. Patchy brown limonitic staining is present throughout the section. Microprobe analyses give the following compositions: olivine, Fa19; orthopyroxene, Fs16. The meteorite is classified as an H5 chondrite. | ||||||||||||||||||||
| Data from: MB76 Table 2 Line 542: |
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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 44547 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
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| Revision history: |
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