Lunar Meteorite: Northwest Africa 16189
| from The Meteoritical Bulletin, No. 112 Northwest Africa 16189 (NWA 16189)(Northwestern Africa) Lunar meteorite (troctolitic anorthosite) History: Purchased by Adam Aaronson in 2022. Physical Characteristics: Exterior surface is irregular shaped and sandblasted with a dark green-gray patina. Freshly broken surface reveals a gray microcrystalline interior with some scattered small vesicles. Petrography: (C. Agee, ) This meteorite is a fine-grained anorthositic troctolite (Prinz and Keil, 1977) with a plagioclase host (85%), and olivine (15%) and pigeonite (5%) as small poikilitic inclusions. Olivines are up to 50 μm in size, pigeonites are up to 10 µm in size. There are numerous very small vesicles throughout. Accessory chromite was observed. Geochemistry: (A. Ross, UNM) olivine Fa30.5±3.7, Fe/Mn=88±12, n=6; pigeonite Fs23.6±2.7Wo18.9±5.9, Fe/Mn=48±3, n=6; plagioclase An96.9±0.4Ab2.9±0.3, n=3. Classification: Lunar (troctolitic anorthosite) based on Stöffler et al. (1980). Specimens: 21.8 g including a probe mount on deposit at UNM, Adam Aaronson holds the main mass. |
| Randy Says… I have not studied Northwest Africa 16189. Compare with NWA 14088, |
More InformationMeteoritical Bulletin Database NWA 16189 References Stöffler D., Knöll H.-D., Marvin U. B., Simonds C. H., and Warren P. H. (1980) Recommended classification and nomenclature of lunar highlands rocks-a committee report. In Proceedings Conf. Lunar Highlands Crust (eds. J. J. Papike and R. B. Merrill), 51-70, Pergamon Press. |