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| Allan Hills A79029 | |||||||||||||||||||||
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| Basic information | Name: Allan Hills A79029 This is an OFFICIAL meteorite name. Abbreviation: ALHA79029 This meteorite may also be called Allan Hills 79029 (ALH 79029) in publications. Observed fall: No Year found: 1979 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  506 g | ||||||||||||||||||||
| Classification history: |
This is 1 of 11077 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 4(1):
Sample No.: ALHA79029 Location: Allan Hills Field No.: 1099 Weight (gms): 505.5 Meteorite Type: H5 Chondrite
Physical Description: Carol Schwarz Sample has very thin patchy fusion crust on four of six surfaces. Where the fusion crust has been worn away, the surfaces are dark reddish-brown in color. The entire meteorite has an iridescent sheen. Several large penetrating fractures are obvious. Chipping revealed a weathered reddish-brown interior. Only a small (5 mm2) area is less severely weathered. Dimensions: 10 x 7 x 4.5 cm.
Petrographic Description: Brian Mason Chondritic structure is well-developed, with chondrules ranging from 0.3-1.5 mm in diameter. The chondrules are set in a granular groundmass of olivine and pyroxene, with minor amounts of nickel-iron and troilite. Weathering is extensive, with brown limonite pervading the section. Microprobe analyses give olivine composition Fa18, orthopyroxene Fs16. The meteorite is classified as an H5 chondrite. | ||||||||||||||||||||
| Data from: MB76 Table 2 Line 467: |
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| References: | Published in Antarctic Meteorite Newsletter 4(1) (1981), 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 43840 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
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