Framing of the West-Siberian plain, a new province of gold-ore deposits incrusts of weathering

The main conditions of formation of gold-bearing crusts of weathering in th e framing of the West-Siberian Plain are considered, and the possibility of discovery of new nontraditional hypergene gold deposits Is estimated. Form ation of Mesozoic and Cenozoic crusts of weathering in this tectonogeomorph ological zone was favored by regional benches in the plain framing, which w ere responsible for humidity anomalies, and by the widespread relict and mo derately uplifted relief providing intense drainage. The tectonic stability in the Mesozoic and Genozoic ensured good preservation of crusts of weathe ring, first of all, their lower zones. Commercial gold mineralization can d evelop in substrate rocks in both concentrated and disseminated forms. Resi dual gold amounts to 50-70% of the mineralization, and hypergene gold usual ly makes up about a third of It. The mountainous framing of the West-Siberi an Plain is highly promising for gold in abundant Mesozoic and Cenozoic cru sts of weathering, because the latter, including products of their local re deposition, spatially coincide with zones of widespread endogenic gold mine ralization.