|from The Meteoritical Bulletin, No. 110 |
Northwest Africa 14005 (NWA 14005)
Classification: Lunar meteorite (feldspathic breccia)
History: Acquired in 2020 by Jose Garcia from Khaled Zed, who had previously found the sample in Algeria.
Physical characteristics: Single stone, gray in color, covered by desert varnish. It retains a small part of the eroded fusion crust. The interior is composed of light and dark clasts, with visible shock melt veins present throughout the matrix.
Petrography: (Jose Garcia, MCM; D. Sheikh, Cascadia) This specimen is a breccia composed predominantly of sub-angular to sub-rounded anorthitic clasts (up to ~1.5 mm) and isolated mineral fragments of olivine and pyroxene set in a fine-grained matrix that contains interconnected areas of shock melt veins and trace amounts of ilmenite and troilite. Estimated modal abundances: Anorthitic plagioclase (90%), Olivine (3%), Pyroxene (3%), Shock melt veins (3%), Opaques (1%).
Geochemistry: (D. Sheikh, Cascadia) Olivine (Fa33.9±3.5, range Fa30.9-37.8, Fe/Mn=72±4, n=5), Low-Ca Pyroxene (Fs42.1±1.5Wo0.8±0.1, range Fs41.0-43.2Wo0.7-0.8, Fe/Mn=50±4, n=2), Pigeonite (Fs28.7±3.2Wo17.7±2.7, range Fs23.4-35.2Wo14.9-21.9, Fe/Mn=53±5, n=10), Augite (Fs21.0±4.0Wo32.0±4.6, range Fs16.9-24.8Wo27.9-37.0, Fe/Mn=53±6, n=3), Plagioclase (An96.0±0.5, range An94.8-97.0, n=36).
Classification: Lunar (feldspathic breccia).
Specimens: 3.04 g and a thin section at Cascadia; main mass (11.8 g) with Jose Garcia at MCM.
I have not studied NWA 14005.
Meteoritical Bulletin Database