from The Meteoritical Bulletin, No. 108
Northwest Africa 12697 (NWA 12697)
Lunar meteorite (feldspathic breccia)
History: Purchased from a mineral dealer in Marrakech, Morocco. Purportedly found near Tindouf, Algeria.
Petrography: (K. Metzler, IfP) Polymict achondritic breccia, consisting of mineral fragments (olivine, pyroxene, plagioclase) and lithic clasts (anorthosites, melt rocks, basalt), set in a nearly black matrix of fine-grained related debris. Intermingled are clast-rich melt particles with ill-defined outlines. Pyroxenes with and without exsolution lamellae are observed. Accessories are Fe,Ni metal, ilmenite, and troilite.
Geochemistry: Mineral compositions and geochemistry: Olivine: Fa35.4±8.0 (24.5-50.5); Fe/Mn (at.): 88-116; n=7. Pyroxene Fs35.3±11.8Wo12.3±5.9 (Fs22.3-53.0Wo3.9-21.8); Fe/Mn (at.): 44-87; n=11. Plagioclase An95.7±2.3 (An91.0-98.8); n=8.
Classification: Lunar feldspathic breccia.
Specimens: 20 g type specimen at IfP. Stephan Decker, Meteorite Museum, Oberwesel, German holds the main mass.
I have not studied Northwest Africa 12603. The description is similar to that of NWA 12603.
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