from The Meteoritical Bulletin, No. 111
Northwest Africa 15288 (NWA 15288)
Lunar meteorite (feldspathic breccia)
History: Purchased by Edwin Thompson in 2021 from a meteorite dealer in Algeria. Later purchased by Paul Stahura.
Physical Characteristics: Single stone with no fusion crust observed.
Petrography: (D. Sheikh, Cascadia) Sample is a fragmental breccia consisting of sub-angular to sub-rounded mm-sized lithic and mineral clasts set within a fine-grained plagioclase-rich matrix. Lithic clast lithologies identified in the sample are primarily highland lithologies and include: anorthosites, olivine norites, noritic anorthosites, and anorthositic norites (Stoffler et al., 1980). Accessory phases include Cr-spinel, ilmenite, and SiO2-rich glass.
Geochemistry: Olivine (Fa22.9±3.6, range Fa18.6-32.6, Fe/Mn=86±10, n=16), Low-Ca Pyroxene (Fs20.8±1.0Wo3.7±0.6, range Fs19.5-21.8Wo2.8-4.1, Fe/Mn=49±8, n=4), Pigeonite (Fs21.5±1.6Wo14.8±6.4, range Fs19.1-23.3Wo7.3-23.3, Fe/Mn=46±7, n=5), Augite (Fs17.1±5.4Wo31.5±7.2, range Fs11.3-21.8Wo27.3-39.8, Fe/Mn=42±7, n=3), Calcic plagioclase (An97.1±0.6, range An95.7-97.9, n=27).
Classification: Lunar (feldspathic fragmental breccia).
Specimens: 20.7 g at Cascadia, main mass with Paul Stahura.
I have not studied Northwest Africa 15288.
Meteoritical Bulletin Database