| Citation: | Qi He, Long Xiao, Ioannis Baziotis, Xiaochao Che, Yuqi Qian, Jiawei Zhao. Complexity of the NWA 773 Clan: New Evidence from Lunar Olivine Gabbro NWA 6950. Journal of Earth Science, 2025, 36(5): 2224-2239. doi: 10.1007/s12583-023-1923-0
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NWA 6950 is a type of cumulate gabbro meteorite that displays features indicating a lunar origin. Specifically, the Fe/Mn values of olivines and pyroxenes in the meteorite suggest a lunar origin, as does the presence of Fe-Ni metal. The meteorite has also undergone intense shock metamorphism, which is evidenced by the presence of ringwoodite, tuite, and xieite (a type of chromite with a CaTi2O4 structure) within the shock melt veins (SMVs). The texture, mineral modal abundances, and bulk compositions (measured from the SMVs) of NWA 6950 are similar to those of the NWA 773 clan, as are the concentrations and patterns of rare-earth-elements in olivine, pyroxene, plagioclase, and phosphate.
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