CO3 chondrite. Individual – 20.63g. Sold with label/certificate of authenticity.
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Northwest Africa 11469 (NWA 11469)
Purchased: 2016 Aug
Classification: Carbonaceous chondrite (CO3)
History: Purchased from Abdeltif Mechaguen in August of 2016 in Mauritania. Reportedly found in Algeria in 2016.
Physical characteristics: Many identical appearing fragments in the range 4-52 g. Weathered exterior; saw cuts reveal numerous small chondrules set in a brown groundmass.
Petrography: (C. Agee, UNM) Microprobe examination of a polished mount shows may porphyritic chondrules, most in the size range 50-300 μm. Fine grained matrix makes up ~40% of this meteorite.
Geochemistry: (C. Agee and A. Santos, UNM) Olivine Fa24.1±16.7, Mn/Fe=97±32, Cr2O3=0.10±0.15 wt%, n=40; low Ca pyroxene Fs9.3±13.5Wo1.3±1.2, n=11; high Ca pyroxene Fs1.3±0.5Wo46.5±0.6, n=3.
Classification: Carbonaceous chondrite (CO3), subtype >3.2 based on the Cr2O3 in olivine, Grossman and Brearley (2005).
Specimens: 20 g on deposit at CSFK, Zsolt Kereszty holds the main mass.