Abstract
Seventy years of gold mining in the North Zaire region resulted in a total output of ca. 350 t of metal, half of this amount coming from recent placer deposits. All deposits are linked to volcano-sedimentary series and associated granitoid bodies constituting the granite-green-stone terrane of northern Zaire. The actual metallotects are tectonic shear structures cutting across various rock types and giving rise either to quartz veins or to quartz-free tabular deposits, thereby obscuring the original stratabound (or rock-type bound) character of the subeconomic mineralization. Both the Archaean magmatic activity and the late Precambrian tectonics have played a role in gold concentration.
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