|from The Meteoritical Bulletin, No. 109
Northwest Africa 13625 (NWA 13625)
Classification: Lunar meteorite (feldspathic breccia)
History: The meteorite was purchased from a dealer in Morocco.
Physical characteristics: Dark-grayish fragment without fusion crust.
Petrography: Feldspathic breccia composed of mineral fragments, basaltic, and impact melt clasts cemented by a mostly shock-melted groundmass. Predominant minerals are calcic plagioclase, olivine, exsolved pyroxene, and pyroxenes showing complex patchy zoning. Minor phases are chromite, ilmenite, and FeS. No metallic was detected. Shock melt frequently shows schlieren and pronounced flow textures.
Geochemistry: (Ansgar Greshake, MNB) olivine: Fa23.7±7.3 (Fa16.9-44.1, FeO/MnO=83±8, n=16); fayalite: Fa80.8±0.1, FeO/MnO=95±2, n=2; low-Ca pyroxene: Fs19.6±0.2Wo3.2±0.7 (Fs19.3-19.8Wo2.2-4.2, FeO/MnO=45±4, n=5); Ca-pyroxene: Fs8.2±0.3Wo44.1±0.8 (Fs7.6-8.6Wo42.8-45.4, FeO/MnO=28±2, n=6); complex zoned pyroxene: Fs38.3±9.6Wo15.4±3.2 (Fs29.2-50.9Wo9.3-18.6, FeO/MnO=55±8, n=5); calcic plagioclase: An96.1±0.8 (An95.2-97.0, n=7)
Classification: Lunar (feldspathic breccia )
Specimens: MNB. Larbi Chnaoui holds the main mass.
I have not studied NWA 13625.
Meteoritical Bulletin Database