大块文石(人造卫星)- 晶体群 - 高度: 13 cm - 宽度: 16 cm- 1.4 kg
编号 81966263
定向火星 Shergottite 结壳辉长岩纹理 西北地区16050 - 9 g - (1)
编号 81966263
定向火星 Shergottite 结壳辉长岩纹理 西北地区16050 - 9 g - (1)
Northwest Africa 16050 (NWA 16050)
(Northwest Africa)
Purchased: 2023 May
Classification: Martian meteorite (Shergottite)
Physical characteristics: Four brownish fragments mostly covered with fusion crust.
Petrography: The meteorite shows a gabbroic texture and is predominantly composed of up to 1.5 mm sized prismatic, irregularly zoned pyroxene, angular, partly euhedral olivine often containing magmatic inclusions, and interstitial maskelynite. Minor phases include chromite, ilmenite, and FeS. The meteorite is highly shocked and contains shock melt veins and pockets.
Geochemistry: olivine: Fa39.7±0.4 (Fa39.1-40.2, FeO/MnO=51±1, n=7); zoned pyroxene: Fs27.9±2.9Wo9.3±2.8 (Fs23.5-34.2Wo3.3-13.0, FeO/MnO=31±2, n=12); maskelynite (An57.6-60.0Ab38.9-41.2Or1.0-1.4, n=7)