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from
The Meteoritical Bulletin, No. 102
Northwest
Africa 7959
(Northwest
Africa)
Purchased: 2013 June
Mass: 156 g
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.
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