NWA 13844 (CM2) – 0.191g

26.00$

1 in stock

Description

Small total weight of 4.13 grams !

Sold in a collection box with label/certificate of authenticity.

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Northwest Africa 13844 (NWA 13844)

(Northwest Africa)

Purchased: 2020 Jan

Classification: Carbonaceous chondrite (CM2)

Petrography: (J. Gattacceca, CEREGE) Chondrules with average apparent diameter 390±320 µm (n=8) set in abundant iron-rich fine-grained matrix. Chondrules have distinct fine-grained dust rims with radial fractures. Accessory minerals: sulfides, rare metal (mostly enclosed in silicates). Calcium carbonates are present. Matrix low EMPA analytical totals indicate the presence of hydrous phases.

Geochemistry: Olivine Fa7.9±8.6, range Fa0.6-25.6 (n=6). Cr2O3 in ferroan olivine 0.53±0.16 wt%. Low-Ca pyroxene Fs3.6Wo0.9 (n=2). Defocused matrix analyses: FeO 22.3±0.4 wt%, analytical total 80.0±0.3 (n=3).

Classification: Carbonaceous chondrites (CM2)