| Price : 2500€ |
Northwest Africa 16712 (NWA 16712)
(Northwest Africa)
Purchased: 2020
Classification: Mesosiderite
History: The meteorite was purchased from a dealer in Morocco.
Physical characteristics: Two brownish fragments without fusion crust.
Petrography: The meteorite is composed of silicate (about 40 vol%) and weakly altered metallic (about 60 vol%) portions. The silica fraction predominantly consists of up to 500 µm sized zoned low-Ca-pyroxene, exsolved low-Ca pyroxene, and calcic plagioclase. Minor phases include silica, chromite, FeS, and merrillite. Metal is predominantly kamacite with minor taenite.
Geochemistry: zoned low-Ca pyroxene: Fs27.0±2.6Wo2.6±0.5 (Fs24.5-30.8Wo2.2-3.7, FeO/MnO=22-31, n=7); low-Ca pyroxene host to augite exsolution lamellae: Fs34.2±0.7Wo4.0±0.2 (Fs33.0-35.1Wo3.8-4.3, FeO/MnO=22-24, n=7); augite exsolution lamellae: Fs16.5±0.3Wo41.3±0.9 (Fs16.2-16.9Wo39.8-42.2, FeO/MnO=18-21, n=7); calcic plagioclase: An94.9±0.2 (An94.4-95.2, n=7)
