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| Allan Hills A79028 | |||||||||||||||||||||
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| Basic information | Name: Allan Hills A79028 This is an OFFICIAL meteorite name. Abbreviation: ALHA79028 This meteorite may also be called Allan Hills 79028 (ALH 79028) in publications. Observed fall: No Year found: 1979 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  16.3 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 4(1):
Sample No.: ALHA79028 Location: Allan Hills Field No.: 1154 Weight (gms) 16.2 Meteorite Type: H6 Chondrite
Physical Description: Roberta Score Stone is totally covered with brown to black fusion crust. Chipping revealed a 1 mm thick weathering rind. The interior is light gray in color with reddish-brown oxidation scattered throughout. Dimensions: 2.5 x 2 x 1 cm.
Petrographic Description: Brian Mason Chondrules are few and ill-defined, tending to merge with the granular groundmass, which consists largely of olivine and pyroxene, with minor amounts of nickel-iron, troilite, and plagioclase. Accessory merrillite was identified with the microprobe Fusion crust, up to 0.5 mm thick, rims part of the section. Minor weathering is indicated by limonitic staining around the nickel-iron grains. Microprobe analyses gave the following compositions: olivine, Fa18; pyroxene, Fs16; plagioclase, An11. The meteorite is classified as an H6 chondrite. | ||||||||||||||||||||
| Data from: MB76 Table 2 Line 466: |
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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 44547 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
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| Revision history: |
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