in African geography, zone of copper deposits and associated mining and industrial development dependent upon them, forming the greatest concentration of industry in black Africa outside the Republic of South Africa. The belt extends about 280 miles (450 km) northwest from Luanshya, Zambia, into the Katanga (formerly Shaba) region of Congo (Kinshasa). The zone is up to 160 miles in width and contains more than a tenth of the world's copper deposits, found mostly in Late Precambrian sedimentary deposits with the ore concentrated in zones indicative of hilltop and beach, or near-shore, environments. Estimates of total reserves range from 57,000,000 to 90,000,000 metric tons in the two countries, about 11 to 27 percent of the world total
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