from The Meteoritical Bulletin, No. 111
Northwest Africa 15368 (NWA 15368)
Lunar meteorite (fragmental breccia)
History: Found in Mali by camel shepherds in January 2021 and subsequently purchased by Ahmed Salek and sold to an anonymous collector in the US..
Physical Characteristics: A single stone with a dark exterior, one side partially covered in caliche. Cut surface reveals a fragmental breccia with many lithic clasts set in a glassy dark-gray ground mass.
Petrography: (D. Dickens, NMMS and A. S. Bell, CUB) This meteorite is a clast-rich polymict breccia with subhedral lithic fragments embedded in a fine-grained groundmass. Fragmental clasts sizes range from <0.1 mm to >6 mm and are primarily comprised of plagioclase, low-Ca pyroxene, pigeonite, augite, and olivine. Minor phases include kamacite and ilmenite. This meteorite is shocked with impact melt textures present.
Geochemistry: (D. Dickens, NMMS and A. S. Bell, CUB) olivine Fa38.0±2.6, Fe/Mn=100±11.4, n=8; lo-Ca pyroxene Fs20.7±0.1,Wo4.0±0.1, Fe/Mn=54±2, n=2; pigeonite Fs30.1±5.2,Wo9.5±3.7, Fe/Mn=54±1, n=3; augite Fs16.9±1.1Wo36.5±2.8, Fe/Mn=45±1 n=2; plagioclase An95.9±3.1 Ab2.9±0.7 Or1.2±3.3, n=15.
Classification: Lunar fragmental breccia.
Specimens: 40 g with probe mount on deposit at Cascadia, 40 g with probe mount on deposit at CUB, anonymous collector holds the main mass.
I have not studied Northwest Africa 15368.
Meteoritical Bulletin Database
Dickens D., Mayne R.G., and Gross J. (2023) A new lunar fragmental breccia meteorite Northwest Africa 15368. 86th Annual Meeting of the Meteoritical Society, abstract no. 6269.