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Allan Hills 90407 | |||||||||||||||||||||||||
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Basic information | Name: Allan Hills 90407 This is an OFFICIAL meteorite name. Abbreviation: ALH 90407 Observed fall: No Year found: 1990 Country: Antarctica [Collected by US Antarctic Search for Meteorites program (ANSMET)] Mass: 0.6 g | ||||||||||||||||||||||||
Classification history: |
This is 1 of 635 approved meteorites classified as CM2. [show all] Search for other: Carbonaceous chondrites, Carbonaceous chondrites (type 2), CM chondrites, and CM-CO clan chondrites | ||||||||||||||||||||||||
Writeup |
Writeup from AMN 15(1):
Sample No.: ALH90407 Location: Allan Hills Field Number: 6619 Dimensions (cm): 1 x 0.9 x 0.6 Weight (g): 0.6 Meteorite Type: C2 chondrite
Macroscopic Description: Cecilia Satterwhite The exterior of this pea-sized meteorite is dark gray to black and contains one small patch of fusion crust. The interior is medium gray. Abundant light colored inclusions and a few small dark inclusions are visible in the coarse grained matrix.
Thin Section (,2) Description: Brian Mason The section consists almost entirely of black matrix, with sparse chondrules and small scattered grains of olivine. Microprobe analyses show that most of the olivine is near Mg2SiO4 in composition, but some iron-rich grains are present, the range being Fa1-31, mean Fag (CV FeO is 123). The meteorite is a C2 chondrite.
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Data from: MB76 Table 2 Line 1408: |
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Catalogs: |
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References: | Published in Antarctic Meteorite Newsletter 15(1) (1992), 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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