from The Meteoritical Bulletin, No. 112
Northwest Africa 15714 (NWA 15714)
Lunar meteorite (feldspathic breccia)
History: Acquired in 2022 by Daniel Sheikh from a meteorite dealer in Algeria.
Physical Characteristics: Single stone with minor fusion crust.
Petrography: (D. Sheikh, Cascadia) Specimen is a breccia comprised of mm to cm-sized lithic clasts set within a fine-grained fragmental matrix containing isolated mineral clasts and accessory ilmenite, chromite, and troilite. Lithic clast lithologies are predominantly FAN in composition (e.g. anorthosites, noritic anorthosites, anorthositic norites) with minor Mg-suite input (e.g. troctolites, troctolitic anorthosites, and a zoned dunite clast containing a chromite-augite symplectite in olivine).
Geochemistry: Olivine (Fa26.1±5.3, range Fa15.3-34.2, Fe/Mn=92±13, n=56), Low-Ca Pyroxene (Fs18.8±6.7Wo3.0±0.6, range Fs10.1-30.0Wo2.1-4.1, Fe/Mn=51±6, n=9), Pigeonite (Fs20.6±5.0Wo13.0±4.6, range Fs13.4-33.1Wo6.4-21.9, Fe/Mn=47±8, n=20), High-Ca Pyroxene (Fs9.4±7.6Wo38.0±8.3, range Fs4.9-18.2Wo28.5-43.3, Fe/Mn=29±8, n=3), Calcic Plagioclase (An95.7±2.4, range An86.5-97.8, n=57).
Classification: Lunar (feldspathic fragmental breccia).
Specimens: 20.2 g at Cascadia, main mass with Cascadia.
I have not studied Northwest Africa 15714.
Meteoritical Bulletin Database