The Meteoritical Bulletin, No.
Northwest Africa 11871
meteorite (feldspathic breccia)
Stones were acquired from a Moroccan dealer in 2017.
characteristics: Purportedly found near Tindouf, Algeria and purchased by Joseph Hum in May
2018 from a dealer in Gladstone, Oregon, who obtained it from a Mauritanian
(A. Irving and S. Kuehner, UWS)
Breccia consisting of mineral clasts of anorthite, olivine, exsolved
pigeonite, unexsolved pigeonite, orthopyroxene,
aluminous subcalcic augite, chromite, ilmenite,
troilite and kamacite in a fine grained, partly vesicular matrix.
(Fa19.7-51.6, FeO/MnO = 92-105, N = 3), orthopyroxene host (Fs45.7Wo3.6,
FeO/MnO = 55), clinopyroxene exsolution lamella (Fs24.2Wo34.6,
FeO/MnO = 54), orthopyroxene (Fs47.9Wo3.6, FeO/MnO =
59), pigeonite (Fs24.8Wo10.0, FeO/MnO = 68),
aluminous subcalcic augite (Fs18.5Wo23.9,
FeO/MnO = 56, Al2O3 = 15.4 wt.%, Na2O =
0.4 wt.%), plagioclase (An94.1-96.4Or0.3-0.1).
Lunar (feldspathic regolithic breccia).
4.73 g including a polished endcut at UWB; remainder with Mr. J. Hum.