The country's Eastern desert is believed to be highly mineral-rich as it forms part of an area known as the Arabian-Nubian shield, a geological feature that stretches from Saudi Arabia and Yemen in the east to Sudan and Egypt in the west.

Investors will be bidding on blocks which will be awarded to them within four months of the bid round being launched, an official at the mineral resources authority said on Sunday.

Egypt in January issued new regulations that appeared to eliminate the need for mining companies to form joint ventures with the government and to limit state royalties to a maximum of 20%.

(Reporting by Ehab Farouk; Writing by Ulf Laessing; Editing by Kirsten Donovan)