Metallogenesis and Tectonics of the Russian Far East, Alaska, and ...

Metallogenic-Tectonic Model for
Late Triassic (230 to 208 Ma; Figure 34)
During the Late Triassic (Carnian to Norian - 230 to 208 Ma). the major metallogenic-tectonic events were (table 3): (1:
inception of continental-margin arcs and associated subduction along the North Asian Craton Margin; (2) continued formation oi
the Stikinia and Quesnellia island arcs and inception of subduction-relaled Talkectna and Bonanza island arc in the WrmgeHia
superterrane, and associated metallogenic beits in these island arc systems; and (3) beginning of sinistral-slip imbrication of the
Stikinia-Quesnellia island arc and metallogenic bells, and associated subduction zones. Sedimnlation continued along the passi\
continental margins of North Asia and N oh America.
Figure 34. Late Triassic (Camian through Norian - 230 to 208 Ma) stage Of teCtmiC model. Refer to text fof expianation of
metallogenic-tectonic events, to tables 3 and 4 for descriptions metallogenic bdts and significant deposits, and to figure 18 for
explanation of abbreviations, symbols, and patterns. Adapted frwn Nokleberg and others (1997b, 1998, 2000).