尤里莱特 NWA 13878 原始无球粒陨石与纳米钻石 - 10 g
编号 84013353
月球整片 - 无底价 陨石 NWA 15018(长石角砾岩) - 15.08 g
编号 84013353
月球整片 - 无底价 陨石 NWA 15018(长石角砾岩) - 15.08 g
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)