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NWA 13215 火星 Shergottite 陨石 具有很酷的内饰! - 0.59 g - (1)
编号 83174349
编号 83174349
Northwest Africa 15018 (NWA 15018)
(North West Africa)
Purchased: Apr 2022
Classification: Lunar meteorite (feldspathic breccia)
Physical characteristics: Many small grayish fragments without fusion crust.
Petrography: The meteorite displays a dark grayish interior and is a polymict breccia predominantly composed of up to 3 mm sized feldspathic and melt clasts plus mineral fragments consolidated by abundant finely recrystallized feldspathic matrix. Dominant minerals are olivine, augite, pigeonite, and calcic plagioclase. Minor phases are silica, ilmenite and FeS.
Geochemistry: olivine: Fa27.7±1.7 (Fa26.3-30.6, FeO/MnO=87±4, n=12); augite: Fs17.4±1.2Wo34.9±1.4 (Fs15.3-19.1Wo33.2-37.5, FeO/MnO=47±4, n=9); pigeonite: Fs25.3±1.6Wo9.3±2.2 (Fs23.0-28.4Wo5.9-13.3, FeO/MnO=53±5, n=11); calcium plagioclase: An97.9±0.1 (An97.6-98.1, n=10)