Lunar Meteorite: El Milhas 007
| from The Meteoritical Bulletin, No. 113 El Milhas 007Tiris Zemmour, Mauritania Lunar meteorite (anorthositic troctolite) History: This meteorite was found by Sahrawi meteorite hunters in northern Mauritania, approximately 14 kilometers north of Chegga. Physical Characteristics: Single stone with a sandblasted exterior lacking fusion crust but showing numerous prominent regmaglypt pits. Surface coloration consists of patches of yellow-brown in most pit recesses, bounded by dark gray ridges. Inspection of a freshly broken surface from the deposit sample suggests that this meteorite is mostly unbrecciated. However, the presence of macroscopic shiny maskelynite indicates high shock stage. Petrography: (C. Agee, UNM) This meteorite is an anorthositic troctolite with plagioclase (~70%), olivine (~25%), and clinopyroxene (~5%), and minor amounts of troilite, ilmenite, taenite, kamacite, and rare Fe-Ni sulfide. The olivine and pyroxene occur primarily as poikiloblastic inclusions within larger plagioclase grains consistent with an overall granulitic texture, however some domains have a relatively high olivine+pyroxene to plagioclase ratio which presumably corresponds to the macroscopic yellow-brown patches observed on the meteorite surface. Geochemistry: (M. Spilde, UNM) Plagioclase An95.5±1.3Ab4.1±1.1, n=4; olivine Fa30.7±6.1, Fe/Mn=96±9, n=6; clinopyroxene Fs30.8±6.7Wo21.1±10.7, Fe/Mn=55±5, n=6. Classification: Lunar (anorthositic troctolite) based on figure 1 in Stoeffler et al. (1980). Specimens: 22 g on deposit at UNM, Matthew Stream holds the main mass. |
| Randy Says… I have not studied El Milhas 007. The reported find location is 137 east of that of El Mashas 001 |
More InformationMeteoritical Bulletin Database El Milhas 007 |