Northwest Africa 13214 (NWA 13214)

(Northwest Africa)

Purchased: 2019

Classification: Ungrouped achondrite

History: The meteorite was purchased from a meteorite dealer in Laayoune, Morocco.

Physical characteristics: Small brownish fragment without fusion crust.

Petrography: The meteorite shows a cumulate texture of up to 1 mm sized high-Ca pyroxene, calcic plagioclase, and less abundant forsteritic olivine often poikilitically enclosed by plagioclase. Pyroxene appears slightly greenish due to its high Cr-content and typically shows reaction textures with adjacent plagioclase. Plagioclase displays a mottled texture but has not been converted into maskelynite. Minor phases include Cr-bearing iron sulfide, taenite and kamacite. Some brownish alteration products are present in the thin section studied.

Geochemistry: olivine: Fa_3.3±0.1 (Fa_3.2-3.4, FeO/MnO=29±3, n=10), contains 0.26±0.02 wt% Cr₂O₃ and 0.35±0.03 wt% CaO; Ca-pyroxene: Fs_1.3±0.1Wo_45.1±0.2 (Fs_1.2-1.4Wo_44.7-45.5, FeO/MnO=16±11, n=13), contains 0.68±0.03 wt% Cr₂O₃ and 2.68±0.11 wt% Al₂O₃; calcic plagioclase: An_89.1±0.9Ab_10.9±0.9 (An_87.2-90.2Ab_9.8-12.8, n=15)

Classification: Achondrite (ungrouped). Likely paired with NWA 7325.