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| Allan Hills 85151 | |||||||||||||||||||||||||||||||||
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| Basic information | Name: Allan Hills 85151 This is an OFFICIAL meteorite name. Abbreviation: ALH 85151 Observed fall: No Year found: 1985 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  13.9 g | ||||||||||||||||||||||||||||||||
| Classification history: |
This is 1 of 4 approved meteorites classified as R3.6. [show all] Search for other: Rumuruti chondrites, Rumuruti chondrites (type 3) | ||||||||||||||||||||||||||||||||
| Writeup |
Writeup from AMN 10(2):
Sample No.: ALH85151 Location: Allan Hills Weight (g): 13.9 Field No.: 2623 Dimensions (cm): 3 x 3 x 1.5 Meteorite Type: C4 Chondrite
Macroscopic Description: Roberta Score A small amount of dull black fusion crust remains on this stone. The exterior surface is dull brownish-gray and is heavily pitted. Chondrules and clasts show relief on the surface. One notable clast is black with small white inclusions. The interior is medium-gray in color with white inclusions. Oxidation is extensive in some areas.
Thin Section (,3) Description: Brian Mason The section shows numerous chondrules (up to 1.2 mm across) and chondrule fragments in a finely granular matrix. Most of the Chondrules consist of granular or porphyritic olivine; pyroxene is rare. Minor amounts of nickel-iron and sulfide are present, mainly as very small grains scattered through the matrix. Microprobe analyses show olivine compositions ranging from Fa0.4 to Fa41, with a mean of Fa34. Pyroxene compositions range from Fs6 to Fs30. The meteorite is classified as a C4 chondrite. | ||||||||||||||||||||||||||||||||
| Data from: MB76 Table 2 Line 1379: |
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| Plots: | O isotopes: | ||||||||||||||||||||||||||||||||
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| References: | Published in Antarctic Meteorite Newsletter 10(2) (1987), 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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