Official Meteoritical Bulletin entry for Northwest Africa 6148:
Northwest Africa 6148 Morocco Find: 2009 Martian meteorite (nakhlite)
History and appearance: Two stones that weigh 270 g and fit together, were purchased in Erfoud, Morocco in 2009 By A. Aaronson. Petrography: (T. Bunch and J. Wittke, NAU): Millimeter-size euhedral augite and olivine (relative proportions, 85:15) are set in a glassy mesostasis of dendritic pyroxenes, acicular Ti-magnetite, and small grains of silica, feldspar, and phosphate. Olivine and augite are strongly zoned. Weathering and shock are both low. Geochemistry: Augite: cores, Fs 23.2 Wo 42 (FeO/MnO = 34); rims to Fa 41.5 Wo38. Olivine: cores, Fa 58 (FeO/MnO = 45); rims to Fa 74.5. Mesostasis feldspar, An 12.3 – 16.7 Or 5. Classification: Martian meteorite (nakhlite); paired with NWA 5790. Specimens: A total of 20.2 g and one thin section are on deposit at UWB. Mr.P. Mani holds the main mass.