Terrigenous Tertiary Gold Bearing Strata: World Distribution, Economic Significancy and Modern Placer Formation Capacity

The article is dedicated to estimation of tertiary terrigenous strata role in world gold mining. Localization peculiarities of tertiary gold deposits and their placers were examined. Main aim of the work is approbation of assumption about rewashing of tertiary median collectors is principal factor of formation for significant part of quaternary gold placers within cenozoic sedimentary basins or in their vicinity. In the article known gold placer sites were reviewed in comparison with areas of tertiary basins (modern and reconstructed) and primary gold occurrences. Modern placers without significant mother lodes in close vicinity are often located in valleys of low and middle mountains highs. These highs are rim of different order tertiary basins (continental slope, intermountain, piedmont basins). Placer gold of these feeder valleys can be viewed as “projection” gold of valley cutting for all tertiary time. Morphostrucural schemes for All World and most representative studied tertiary gold bearing regions are present there. Possibilities of finding of new gold deposits of the type in Russia and in the World were considered.