Description
Northwest Africa 14593 (NWA 14593)
(Northwest Africa)
Purchased: 2021
Classification: Enstatite achondrite (Aubrite)
History: Purportedly found in 2021 in an area called Bouagba, in the west of the city Oum el Assel.
Petrography: (K. Metzler, IfP) Unbrecciated achondrite (orthopyroxenite), consisting of nearly iron-free pyroxene (enstatite) with grain sizes up to ~8 mm. Accessories are diopside and (strongly altered) daubreelite (up to 4 mm in size). Feldspar and olivine were not found in the investigated thin section.
Geochemistry: Mineral compositions and geochemistry: Low-Ca pyroxene composition: Fs0.2±0.2Wo0.9±0.1 (Fs0.0-0.5Wo0.6-1.0); n=12. High-Ca pyroxene composition: Fs0.2±0.1Wo43.3±1.8 (Fs0.0-0.5Wo41.0-46.7); n=12.
Classification: Aubrite, based on texture and mineral chemistry.
Specimens: Largest piece: 104 g
