Meteoritical Bulletin, No. 106
Rabt Sbayta 008
Rio de Oro, Western Sahara
Meteorite (feldspathic breccia)
History: Purportedly found at a location NE of Bir Anzarane and purchased by Ben Hoefnagels in January
2017 from a dealer in Ouarzazate, Morocco.
Physical characteristics: A single
broken, pale beige-colored, roughly prismatic-shaped stone (229 g) with
degraded fusion crust coating three sides.
Petrography: (A. Irving and
S. Kuehner, UWS) Leucocratic,
clast-rich breccia composed predominantly of anorthite, olivine, pigeonite
and subcalcic augite with accessory ilmenite, chromite, troilite and
Geochemistry: Olivine (Fa24.4-60.5,
FeO/MnO = 84-89, N = 3), orthopyroxene (Fs20.6Wo3.2,
FeO/MnO = 51), pigeonite (Fs21.29Wo7.7, FeO/MnO =
46), subcalcic augite (Fs21.0Wo23.6; Fs29.5Wo32.1;
FeO/MnO = 41-54), plagioclase (An95.6-96.3Or0.2, N =
(feldspathic breccia). Although this lunar specimen was found in the same
dense collection area as the Rabt Sbayta 002, Rabt
Sbayta 004, Rabt Sbayta 005 and Rabt Sbayta 006 stones (but at a
different location from Gataa Sfar),
it differs from those stones in both petrologic and bulk compositional
characteristics and thus is not paired with them (nor with Rabt Sbayta 007).
Specimens: 24.3 g including
a polished slice at UWB; remainder with Mr. B. Hoefnagels.