| Price : 800 € |
Northwest Africa 16714 (NWA 16714)
(Northwest Africa)
Purchased: 2021
Classification: HED achondrite (Eucrite, polymict)
History: The meteorite was purchased from a dealer in Morocco.
Physical characteristics: Grayish individual partly covered with fusion crust.
Petrography: Polymict breccia composed of up to 2 cm sized bulk rock, basaltic, and dark impact melt clasts plus up to 5 mm sized mineral fragments in fine-grained clastic matrix. Predominant mineral phases are zoned low-Ca pyroxene, exsolved pyroxene, and calcic plagioclase. Minor phases include silica, chromite, ilmenite, and troilite. No metal detected.
Geochemistry: zoned low-Ca pyroxene: Fs32.7±9.8Wo1.7±0.7 (Fs21.1-49.1Wo1.3-2.8, FeO/MnO=28-44, n=7); low-Ca pyroxene host to augite exsolution lamellae: Fs49.5±0.1Wo1.9±0.2 (Fs49.3-49.7Wo1.6-2.2, FeO/MnO=27-29, n=7); augite exsolution lamellae: Fs17.1±0.3Wo43.9±0.7 (Fs16.6-17.5Wo42.5-44.7, FeO/MnO=22-26, n=7); calcic plagioclase: An93.6±1.0 (An92.1-94.9, n=7)
