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| Allan Hills A79012 | |||||||||||||||||||||
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| Basic information | Name: Allan Hills A79012 This is an OFFICIAL meteorite name. Abbreviation: ALHA79012 This meteorite may also be called Allan Hills 79012 (ALH 79012) in publications. Observed fall: No Year found: 1979 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  191.9 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 4(1):
Sample No.: ALHA79012 Location: Allan Hills Field No.: 1052 Weight (gms): 191.9 Meteorite Type: H5 Chondrite
Physical Description: Roberta Score Fusion crust exists as thin patches over all but one surface. Several cracks penetrate the interior of this meteorite. The overall color of the stone is a deep reddish-brown. No unweathered material was exposed when the sample was chipped. Dimensions: 9 x 5.5 x 3.5 cm.
Petrographic Description: Brian Mason Chondritic structure is well-developed, with chondrules 0.5-1.2 mm in diameter. The chondrules are set in a fine-grained matrix consisting largely of olivine and pyroxene, with minor amounts of nickel-iron and troilite. Weathering is extensive, with limonitic staining and areas of red-brown limonite throughout the section. Remnants of fusion crust are present along one edge. Microprobe analyses gave the following compositions: olivine, Fa17; pyroxene, Fs15; accessory merrillite was identified. The meteorite is classified as an H5 chondrite. | ||||||||||||||||||||
| Data from: MB76 Table 2 Line 450: |
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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 44543 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
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| Revision history: |
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