The Meteoritical Bulletin, No. 105
Mass: 43.56 g
Purchased from Jaouad Chaoui in Marrakesh,
Morocco, December 2015; reportedly found in Mauritania.
characteristics: Single stone, weathered exterior
without fusion crust; broken surface reveals numerous white feldspathic
clasts set in a dark-gray groundmass.
(C. Agee, UNM) This is a highly
feldspathic breccia with primarily magnesian olivine (Fa20) and pyroxene
fragments scattered throughout. Minor amounts of more iron-rich olivine
(Fa41) and pigeonite (Fs66Wo23) were detected. Vesicular shock melt veins
and pockets are also present.
(C. Agee and S. Spilde, UNM) Olivine Fa20.0±2.0, Fe/Mn=84±6, n=12; pigeonite
Fs33.5±8.9Wo9.4±8.6, Fe/Mn=63±11, n=10; augite Fs22.9±2.3Wo40.1±0.8,
Fe/Mn=58±5, n=2; plagioclase An97.0±0.5, n=5; Shock melt (20
μm defocused electron beam, proxy for bulk meteorite composition): SiO2=44.5±0.7,
TiO2=0.15±0.07, Al2O3=30.7±2.7, Cr2O3=0.06±0.04,
MgO=5.2±1.9, FeO=2.9±1.1, MnO=0.04±0.00, CaO=17.0±1.0, NiO=0.01±0.01,
Na2O=0.37±0.02, K2O=0.03±0.01 (all wt%), n=3.
Lunar (feldspathic breccia).
8.8 g including a probe mount on deposit at UNM; Jean Redelsperger holds the main