from The Meteoritical Bulletin, No. 111
Northwest Africa 15300 (NWA 15300)
Lunar meteorite (melt breccia)
History: Purchased in Morocco from Aziz Habibi by Jay Piatek in 2016.
Physical Characteristics: Exterior has an irregular surface topography with significant oxidation staining. A sawcut surface reveals this meteorite to be a breccia with scattered fragments of light and brown colored clasts set in dark gray matrix.
Petrography: (C. Agee, UNM) Electron microprobe analysis and reflected light microscopy of a polished mount show mineral and microgabbro clasts scattered in a microcrystalline vesicular melt rock matrix. Minor amounts of ilmenite, silica, Fe-metal (low Ni), and Cr-spinel were detected. Barite, which is presumably a weathering product, was also detected.
Geochemistry: (A. Ross, UNM) Olivine Fa46.6±22.6, Fe/Mn=91±6, n=6; clinopyroxene Fs36.3±17.3Wo14.8±11.2, Fe/Mn=55±10, n=7; plagioclase An95.1±1.0, n=4; shock melt (30 μm beam) SiO2=43.3±0.4, Al2O3=29.6±0.8, TiO2=0.22±0.04, FeO=4.0±0.6, MgO=3.8±0.04, CaO=15.9±0.3, n=6 (all wt%).
Classification: Lunar melt breccia.
Specimens: 20.5 g on deposit at UNM, Jay Piatek holds the main mass.
I have not studied Northwest Africa 15300.
Meteoritical Bulletin Database