Northwest Africa 10962 (NWA 10962)
Classification: HED achondrite (Eucrite, unbrecciated)
History: Purchased by Fayssal Mezgouri in 2015 from a nomad in northwest Africa and sold to Dustin Dickens in 2016.
Physical characteristics: Two stones of approximately equal mass with glassy, partially oxidized fusion crust on one side of each and sand-ablated patina on the remaining surfaces.
Petrography: (Z. Guo, UWO) Medium grained igneous rock. Modal abundances and corresponding grain sizes: plagioclase 60% (400-500 μm), pyroxene 40% (300-1000 μm) and metal ~1% (100-200 μm). Magnetic susceptibility log χ (× 10-9 m3/kg) = 3.81. Undulatory extinction is present in some plagioclase. Metal has a narrow oxide rim.
Geochemistry: Mineral composition and geochemistry: Pyroxenes: low-Ca Fs58.6±1.4Wo 3.6±1.8 (N=6), High-Ca: Fs 29.3±2.1Wo39.9±2.4 (N=9), Fe/Mn ratio of 27.3±0.8 (N=15). Plagioclase: An89.7±0.3 (N=10).
Classification: Eucrite, unbrecciated.
Specimens: 21.9 g at UWO including a thin section.