Lunar meteorite Northwest Africa 11962: A regolith breccia containing records of titanium?rich lunar volcanism and the high alkali suite

Northwest Africa (NWA) 11962 is a lunar regolith breccia composed of wide range different clasts. The origin this meteorite confirmed by oxygen isotope analysis and the Fe/Mn ratio in pyroxene olivine. In present study, clasts matrix NWA are characterized optical electron microscopy along with microprobe analyses micro-Raman spectroscopy. has glassy impact melt matrix, which accounts for 35% surface area two thin sections examined, contains very large variety lithic clasts, monomineralic glass fragments. presence volcanic impact-related spherules led to classification as breccia. Lithic include numerous fragments quartz monzogabbro felsite, quite rare lithologies alkali suite. However, most abundant components gabbroic mineral chemistry pyroxenes various types indicate an from low-Ti high-Ti mare basalt volcanism. addition peculiar petrographic characteristics 11962, possible pairing relationships other meteorites discussed.