Geology, mineralization, and fluid inclusion characteristics of the Agylki reduced tungsten (W-Cu-Au-Bi) skarn deposit, Verkhoyansk fold-and-thrust belt, Eastern Siberia: Tungsten deposit in a gold-dominant metallogenic province

The Agylki deposit is a large (>100 Kt WO3, possibly underexplored) and high-grade (average 1.46% WO3, 2.79% Cu, 0.5 g/t Au, and 0.03–0.04% Bi) reduced W skarn deposit situated in the Verkhoyansk fold-and-thrust belt, the latter formed after a passive continental margin, part of the Verkhoyansk-Kolyma gold-dominant metallogenic province. The belt comprises intrusion-related Au mineralization and roughly parallels the other main metallogenic...