Description
A really cool 19.1g full slice of the meteorite NEA 104. Sold in a box with label/certificate.
Northeast Africa 104 (NEA 104)
Libya
Purchased: 2025
Classification: Lunar meteorite (troctolite melt breccia)
History: The meteorite was purchased from a dealer in Libya.
Physical characteristics: Several dark-grayish rocks with some fusion crust.
Petrography: The meteorite consists of a coarse- and a fine-grained lithology both predominantly composed of anorthosite clasts (coarse: up to 4 mm, fine up to 1.5 mm), olivine aggregates (coarse: up to 1.5 mm, fine up to 0.5 mm, and subordinate Ca-rich pyroxene grains set in abundant plagioclase-rich melt rock matrix. Anorthosite is partly transformend into maskelynite. While parts of the melt are glassy showing some flow textures, other regions are recrystallized to small often lath-shaped plagioclase crystals. Olivine aggregates are mostly composed of numerous subgrains with slightly variable composition. Ca-pyroxene appears to be more common in the coarse-grained lithology. Minor phases include chromite, ilmenite, and kamacite.
Geochemistry: olivine: Fa16.5±0.8 (Fa15.6-20.0, FeO/MnO=73±8; n=25); Ca-pyroxene: Fs8.1±2.0Wo40.7±1.7 (Fs5.8-11.7Wo35.5-42.5, FeO/MnO=34±6, n=15); calcic plagioclase: An97.4±0.3 (An96.8-97.9, n=10)
