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NWA 13166 (37.59 gram)


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[ Meteoritical Bulletin Database ]


Classification: Eucrite Melt Breccia S-moderate / W-low
Place/Time: 2019 in Morocco
Mass: 400g

Physical characteristics: Dark-grayish rock with some fusion crust.

Petrography: The meteorite is a eucrite-melt breccia composed of up to 1.5 cm sized basaltic clasts set into black melt rock matrix. Basaltic clasts consist of exsolved pyroxenes and often lath shaped calcic plagioclase up to 1.5 mm in size. The fine-grained melt rock is mostly recrystallized and mineral grains in contact with the melt are partly resorbed; some regions show flow textures. Minor phases include silica, chromite, ilmenite, FeS, and barite. No metallic iron has been detected.

Geochemistry: low-Ca pyroxene: Fs59.2±0.5Wo2.2±0.1 (Fs58.4-59.8Wo2.0-2.4, FeO/MnO=25-28, n=14); Ca-pyroxene: Fs25.7±0.9Wo43.8±0.8 (Fs24.4-27.7Wo41.9-43.8, FeO/MnO=25-34, n=13); calcic plagioclase: An90.3±1.1 (An88.9-92.1, n=13)