Leucocratic, albite-rich granitoid with accessory Sn-Ta-Nb mineralization, intruded into a metasedimentary sequence (mica schists and hornblende schists) alternating with metavolcanics and serpentinites. Albite granite dikes and apophyses are common in the metasediments. Marginal pegmatite zones (stockscheider), quartz segregations and quartz-amazonite veins occur near the contact as well and these are locally associated with minor greisenization of the metasediments. Ore reserves are estimated at 30 million tons, grading at 0.02% Ta2O5 and 0.01% Nb2O5.
References:
- Helba, H., Trumbull, R.B., Morteani, G., Khalil, S.O., and Arslan, A. (1997): Geochemical and petrographic studies of Ta mineralization in the Nuweibi albite granite complex, Eastern Desert, Egypt. Mineralium Deposita 32, 164-179.
- Küster, D. (2009): Granitoid-hosted Ta mineralization in the Arabian-Nubian Shield: Ore deposit types, tectono-metallogenetic setting and petrogenetic framework. Ore Geology Reviews 35, 68-86.
Mineral List:21 entries listed. 16 valid minerals.
The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database!
