from The Meteoritical Bulletin, No. 108
Purchased: 2017 November
Mass: 1337 g
Lunar (fragmental breccia)
History: A single weathered stone lacking a
fusion crust was found in 2015 by a pair of local meteorite hunters in the
Al Jouf region of Saudi Arabia. Purchased by Dustin Dickens in November
2017 while on expedition in the region.
Physical characteristics: Dark, sand-blasted exterior. Dark homogeneous groundmass with
sub-mm sized clasts. Mm-width melt veins visible across exterior. No fusion
Petrography: (T. S. Hayden, M. Anand, OU) The meteorite is a clast-rich
fragmental breccia containing numerous mineral and lithic fragments
embedded in a fine-grained matrix. The lithic clast population consists
primarily of basaltic clasts, dominated by Ca-rich pyroxene and plagioclase
and olivine. There is a large (~2.3mm) granulite clast which appears to be
of the ferroan anorthosite suite, with accessory apatite and ulv_spinel.
The size range of the lithic clasts is 0.24-3.41mm. Mineral clasts and
fragments are mainly pyroxene, olivine, plagioclase and chromite. Some
regolith material (vesicular) present also.
Mineral composition and Geochemistry: (T. S. Hayden, M. Anand, OU) Feldspar (An96.4±0.8Ab3.5±0.8,
N = 79), Pigeonite (Fs32.1±3.2Wo13.6±3.2,
Fe/Mn=59.4±4, N=41), Augite (Fs25.8±5.6Wo28.6±7.5,
Fe/Mn=57.1±6.8, N=18), Olivine (Fa41.6±9.8, Fe/Mn=103.3±10,
N=116). O isotopes (measured at OU): δ17O = 3.484‰, δ18O
= 6.646‰, Δ17O=-0.002‰ (linearized using a slope of
Classification: Lunar fragmental regolith breccia.
Specimens: 21g type specimen
held at OU. Main mass held by