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| Allan Hills 85003 | |||||||||||||||||||||||||
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| Basic information | Name: Allan Hills 85003 This is an OFFICIAL meteorite name. Abbreviation: ALH 85003 Observed fall: No Year found: 1985 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass:  50.1 g | ||||||||||||||||||||||||
| Classification history: |
This is 1 of 12 approved meteorites classified as CO3.5. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 3), CM-CO clan chondrites, and CO chondrites | ||||||||||||||||||||||||
| Writeup |
Writeup from AMN 10(1):
Sample No.: ALH85003 Location: Allan Hills Weight (g): 50.1 Field No.: 2259 Dimensions (cm): 4x3.5x2.5 Meteorite Type: C3O Chondrite
Macroscopic Description: René Martinez Thick patchy fusion crust covers approximately 70% of this carbonaceous chondrite. The interior is light gray and chondrules/clasts are not distinguishable in the granular matrix. A 1 mm thick weathering rind and small patches of rust are present.
Thin Section (,4) Description: Brian Mason The thin section shows an aggregate of small chondrules (up to 0.9 mm diameter, but most are less than 0.6 mm), chondrule fragments, and irregular aggregates set in a translucent yellow-brown matrix. Chondrules are mainly granular or porphyritic olivine. Minor amounts of nickel-iron and sulfide are present, as small grains scattered throughout the section. Microprobe analyses of olivine show a wide composition range, Fa1-56, mean Fa17; only a few grains of pyroxene were found, having a composition range of Fs0.5-23. The meteorite is classified as a C3 chondrite of the Ornans subtype; it is so similar to ALH82101 that the possibility of pairing should be considered. | ||||||||||||||||||||||||
| Data from: MB76 Table 2 Line 1232: |
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| References: | Published in Antarctic Meteorite Newsletter 10(1) (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 44547 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||||||
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| Revision history: |
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