from The Meteoritical Bulletin, No. 111
Northwest Africa 15377 (NWA 15377)
Lunar meteorite (feldspathic breccia)
History: Purchased by Craig Zlimen from a meteorite dealer in Algeria in 2021.
Physical Characteristics: Sample contains minor fusion crust.
Petrography: (D. Sheikh, Cascadia) Specimen is a polymict breccia comprised of mm-sized lithic and monomineralic clasts set within a dark, finer-grained fragmental matrix. Lithic clast lithologies identified include: anorthosites, troctolites, olivine norites, noritic anorthosites, and impact-melt-rich clasts. Accessory phases include ilmenite, spinel (some Cr-rich), SiO2-rich glass, and chromite (some Ti-rich).
Geochemistry: Olivine (Fa22.4±9.7, range Fa10.9-44.4, Fe/Mn=84±12, n=30), Low-Ca Pyroxene (Fs23.1±10.2Wo3.6±0.8, range Fs13.1-36.5Wo2.1-4.5, Fe/Mn=50±6, n=9), Pigeonite (Fs31.8±6.3Wo8.9±3.6, range Fs26.2-39.9Wo5.6-14.7, Fe/Mn=51±4, n=5), High-Ca Pyroxene (Fs17.4±10.8Wo39.4±3.8, range Fs7.2-35.1Wo33.8-42.9, Fe/Mn=41±9, n=5), Calcic Plagioclase (An96.0±0.7, range An94.6-97.3, n=30).
Classification: Lunar Lunar (feldspathic fragmental breccia).
Specimens: 20.2 g at Cascadia, main mass with Craig Zlimen.
I have not studied Northwest Africa 15377.
Meteoritical Bulletin Database