Found in 2019
Total mass : 150g
Specimen in collection :
10.31g complete specimen crusted
Northwest Africa 13215 (NWA 13215)
Classification: Martian meteorite (Shergottite)
History: The meteorite was purchased from a meteorite dealer in Laayoune, Morocco.
Physical characteristics: Dark-grayish rock largely covered with fusion crust.
Petrography: The meteorite displays a fresh grayish interior with a coarse-grained basaltic texture predominantly composed of up to 3 mm sized pyroxene and plagioclase grains. Pyroxene is intensely fractured pigeonite and augite showing patchy compositional zoning. Minor phases are merrillite, ilmenite, pyrrhotite, and some Si-rich mesostasis. The meteorite is highly shocked, i.e., plagioclase is completely transformed into maskelynite and black shock melt pockets and shock veins are abundant.
Geochemistry: pigeonite: Fs54.7±16.3Wo16.8±1.1 (Fs31.2-69.3Wo15.2-18.2, n=6, FeO/MnO=26-35); augite: Fs45.4±13.7Wo25.4±4.2 (Fs27.3-68.9Wo20.3-34.1, n=12, FeO/MnO=26-36); maskelynite: An56.0±1.9Ab43.9±1.9Or0.1±0.0, n=17