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Allan Hills 84205 | |||||||||||||||||||||
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Basic information | Name: Allan Hills 84205 This is an OFFICIAL meteorite name. Abbreviation: ALH 84205 Observed fall: No Year found: 1984 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass: 25.2 g | ||||||||||||||||||||
Classification history: |
This is 1 of 29 approved meteorites classified as L3.9. [show all] Search for other: L chondrites, L chondrites (type 3), Ordinary chondrites, and Ordinary chondrites (type 3) | ||||||||||||||||||||
Writeup |
Writeup from AMN 11(1):
Sample No.: ALH84205 Location: Allan Hills Weight (g): 25.2 Field No.: 2830 Dimensions (cm): 3x2.5x2 Meteorite Type: L3 Chondrite
Macroscopic Description: Roberta Score. Fusion crust covers 501 of ALH84205. The interior is made up of light to medium gray matrix with abundant light and dark inclusions/chondrules.
Thin Section (,2) Description: Brian Mason Chondrules and chondrule fragments are abundant, ranging up to 2.1 mm across; most are granular olivine and olivine-pyroxene, but barred olivine and cryptocrystalline pyroxene chondrules are also present. Man; have narrow black rims. Nickel-iron and troilite are present in small amounts. Microprobe analyses show olivine ranging in composition from Fa12 to Fa33, with a mean of Fa19 (CV FeO is 27); pyroxene composition ranges from Fs4 to Fs19. The meteorite is classified as an L3 chondrite (estimated L3.7). | ||||||||||||||||||||
Data from: MB76 Table 2 Line 1170: |
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Catalogs: |
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References: | Published in Antarctic Meteorite Newsletter 11(1) (1988), JSC, Houston Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
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Geography: |
Statistics: This is 1 of 44400 approved meteorites from Antarctica (plus 3802 unapproved names) | ||||||||||||||||||||
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Revision history: |
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