Lunar Meteorite: Northwest Africa 7959
from The Meteoritical Bulletin, No. 102
Northwest Africa 7959 (NWA 7959)
Classification: Lunar meteorite (feldspathic breccia)
History: Purchased by Stefan Ralew in June 2013 from a Moroccan dealer at the Ensisheim Show.
Petrography: (A. Irving and S. Kuehner, UWS) Angular mineral clasts are set in a fine grained, vesicular glassy matrix. Minerals are olivine, orthopyroxene, pigeonite, augite, anorthite, ilmenite and small, ragged grains of kamacite. Small amounts of terrestrial calcite and barite are present.
Geochemistry: Olivine (Fa14.7-35.9, FeO/MnO = 77-107), orthopyroxene (Fs17.3Wo2.5, FeO/MnO = 55), pigeonite (Fs23.6-24.4Wo9.9-11.4, FeO/MnO = 47-49), augite (Fs13.2Wo40.6, FeO/MnO = 36), anorthite (An96.0-96.1Or0.0).
Bulk composition (R. Korotev, WUSL): INAA of subsamples gave mean abundances of FeO 3.3 wt.%, and (in ppm) Sc 19, La 2.6, Sm 1.2, Eu 0.78, Yb 0.8, Th 0.4.
Classification: Lunar (feldspathic regolithic breccia).
Specimens: 20.2 g are at UWB. The remainder is with Ralew.
Compositionally, Northwest Africa 7959 is a typical feldspathic lunar meteorite, but different from the any others in detail.
Meteoritical Bulletin Database
Korotev R. L. and Irving A. J. (2014) Keeping up with the lunar meteorites – 2014. 45th Lunar and Planetary Science Conference, abstract no. 1405.
Korotev R. L. and Irving A. J. (2021) Lunar meteorites from northern Africa. Meteoritics & Planetary Science, 206–240.