NWA 10100 CO3 309g (4)

Price 10$/g

 

Northwest Africa 10100 (NWA 10100)

(Northwest Africa)

Purchased: 2013 July 10

Classification: Carbonaceous chondrite (CO3)

Petrography: (A.E. Rubin, UCLA) Matrix abundance is ~45%, average chondrule diameter is ~200 μm. Most chondrules are type I porphyritic, consistent with a carbonaceous chondrite. Some small amoeboid olivine inclusions are present (~300 μm in diameter). Heterogeneity of olivine and abundant polysynthetically twinned low-Ca pyroxene are indicative of an unequilibrated chondrite. Chondrules are sharply defined.

Geochemistry: Mineral compositions and geochemistry: (A.E. Rubin, UCLA) Cr2O3 of ferroan olivine: 0.08±0.07 (n=11).

Comments before final submission :

The meteorite’s matrix abundance is ~45%, and its average chondrule diameter is ~200 microns. Most chondrules are type-1 porphyritic, consistent with a carbonaceous chondrite. Some small aboeboid olivine inclusions are present (~300 microns in diameter). Heterogeneity of olivine and abundant polysynthetically twinned low-Ca pyroxene are indicative of a type-3 chondrite. Chondrules are sharply defined.
CO3.2 S1


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