Metallogenesis and Tectonics of the Russian Far East, Alaska, and the Canadian Cordillera

End-Permian to mid-Triassic termination of the accretionary processes of the southern Altaids: implications for the geodynamic evolution, Phanerozoic continental growth, and metallogeny of Central Asia

“…Alaskan-type complexes have been described from arc, backarc and forearc settings associated with subduction zones, and they are typical plutonic constituents of subduction-related volcanic belts from the Archean (Brugmann et al 1997) to the Neogene (Tistl et al 1994). The Alaskan-type complexes indicate basaltic arc magmatism that is part of the magmatic evolution of the convergent continental margin in western Canada and southeastern Alaska (Taylor 1967;Himmelberg and Loney 1995;Nokleberg et al 2005).…”

“…The southern Altaids is a Precambrian-early Mesozoic orogenic belt that provides excellent information on accretionary processes, metallogeny and continental growth that are complementary to the younger Phanerozoic accretionary orogens in Mesozoic-Cenozoic Japan, Alaska and the American Cordillera (Sample and Fisher 1986;Haeussler et al 1995;Nelson 1996;Goldfarb et al 1997;Hansen and Dusel-Bacon 1998;Nokleberg et al 2005), and other accretionary orogens in the world Gray et al 2002;Glen et al 2007 Fig. 11 Schematic map of the Altaids showing principal mineral deposits which are linked to accretionary processes (modified after Seltmann and Porter 2005;Tang and Liu 1995;Han et al 2006a, b).…”

A unified model for gold mineralisation in accretionary orogens and implications for regional-scale exploration targeting methods

“…Consistent with this, an increasing number of major gold provinces with a variety of deposit styles throughout the world have been shown to occur at the margins of older, pre-existing cratonic lithospheric domains. These include the NorsemanWiluna Belt (Cassidy 2006), Abitibi Belt (Faure et al 2011), Bingham Canyon (Groves et al 2005a, Olympic IOCG province (Hand et al 2007), NE Siberia gold province (Nokleberg et al 2005), New Guinea Highlands (Hill et al 2002), Stawell, Victoria (Miller et al 2006) and the Tombstone-Tintina Belt (Mair et al 2011).…”

“…Solomon (1990) was the first to point out an empirical association in the SW Pacific between gold fertility and subduction from more than one direction under the same lithospheric block. Nokleberg et al (2005) inferred three different directions of subduction beneath the Kolyma-Omolon block in the Jurassic, prior to the major Cretaceous period of gold metallogeny in the region, which was strongly concentrated around the margins of this block.…”

Direct Associations Between Potassic Igneous Rocks and Gold-Copper Deposits in Volcanic Arcs

“…The mineral potential of the Baimka district was discovered during large regional stream sediment and soil sampling surveys in the nineteen seventies and early-eighties (Nokleberg et al 2005;Chitalin et al 2012). Contour maps plotting the elements Cu, Mo, Pb, and Zn revealed subtle, but perfectly zoned anomalies in the permafrost soils (Nokleberg et al 2005). The Baimka district represents a cluster of porphyry copper-gold systems, probably related to a fractionating magma chamber at depth.…”