The Meteoritical Bulletin, No. 103
Purchased: 2014 September
Mass: 72 g
meteorite (feldspathic breccia)
Purchased by Stefan Ralew in September 2014 in Erfoud, Morocco.
characteristics: Single stone (72 g) lacking fusion
crust and composed of angular, mostly whitish clasts in a very dark gray
matrix with some crosscutting veins of vesicular glass.
(A. Irving and S. Kuehner, UWS) Fragmental olivine-poor breccia composed of
mineral clasts in a finer matrix. Minerals include anorthite, pigeonite,
orthopyroxene, augite, ilmenite and merrillite, along with rare olivine,
Cr-armalcolite and kamacite.
Orthopyroxene (Fs27.0Wo2.6; FeO/MnO = 70, N = 1),
ferroan pigeonite (Fs53.0Wo16.8, FeO/MnO = 65, N =
1), pigeonite (core Fs26.5Wo19.8; FeO/MnO = 54; rim
Fs71.6Wo25.2; FeO/MnO = 85), augite (Fs23.4Wo41.0,
FeO/MnO = 58, N = 1), olivine (Fa30.4, FeO/MnO = 92; Fa11.3,
FeO/MnO = 117, N = 2), plagioclase (An96.1-96.5Or0.1-0.5,
N = 2). Bulk composition (R.
INAA of subsamples gave the following mean abundances (in wt.%) FeO 5.2, Na2O
0.44; (in ppm) Sc 11.8, La 6.0, Sm 2.5, Eu 0.85, Yb 2.3, Lu 0.32, Th 1.7.
Lunar (feldspathic fragmental breccia). This specimen contains much less
olivine than most lunar feldspathic breccias, but some of the olivine that
is present is very magnesian.
Specimens: 14.4 g including one polished
endcut at UWB; main mass with Ralew.