Meteoritical Bulletin, No. 107
Northwest Africa 11966
Meteorite (feldspathic breccia)
History: Purchased by Jay Piatek on
April 27, 2015 from a Moroccan meteorite dealer.
Physical characteristics: Single
stone, fresh fusion-crusted exterior. A saw cut reveals a fragmental
breccia with many white feldspathic clasts and a large lithic clast set in
a dark-gray groundmass.
Petrography: (C. Agee, UNM) This meteorite is a breccia of
fragmental pyroxene, olivine, plagioclase grains. There are many domains
that are fine-grained and cataclastic with shock melt and vesicles.
Geochemistry: (C. Agee, UNM) olivine Fa35.8±5.0,
Fe/Mn=98±11, n=10; pigeonite Fs33.6±5.3Wo12.6±6.8,
Fe/Mn=58±3, n=8; augite Fs29.0±2.9Wo34.8±4.3,
Fe/Mn=57±1, n=2; plagioclase An96.4±0.9, n=7; Shock melt (20
μm defocused electron beam, proxy for bulk meteorite composition): SiO2=43.4±0.4,
TiO2=0.18±0.06, Al2O3=31.0±1.2, Cr2O3=0.06±0.03,
MgO=3.0±0.6, FeO=3.6±0.8, MnO=0.05±0.03, CaO=17.5±0.5, Na2O=0.35±0.04,
K2O=0.07±0.02 (all wt%), n=7.
Specimens: 20.1 g including
a probe mount on deposit at UNM,
Jay Piatek holds the main mass.