MSc student Adam Wiest has published a new fieldwork article in Yukon Exploration & Geology!
Isolated occurrences of Lower Jurassic(?) strata known informally as the Faro Peak formation crop out along the Yukon-Tanana – Slide Mountain terrane boundary near Faro, Yukon. Wiest and Beranek (2019) outline a two-year project to investigate the origin of the Faro Peak formation and constrain its physical stratigraphy, depositional age, and relationship to equivalent synorogenic rock units in the Whitehorse trough region of central Yukon. The exposed base of the Faro Peak formation includes argillite and organized to disorganized sandstone units to the southwest of the Vangorda fault. Lower Faro Peak formation units have mafic-intermediate volcanic provenance and were deposited by concentrated density flows or turbidity currents. The upper Faro Peak formation contains massive, disorganized conglomerate and sandstone units that were sourced from the Yukon-Tanana and Slide Mountain terranes and deposited by non-turbulent debris or density flows. These field observations will be integrated with future detrital zircon U-Pb-Hf studies to confirm the age and provenance of Faro Peak formation rock units and determine the spatial extent of Jurassic exhumation and synorogenic sedimentation in the northern Cordillera. This project is supported by the Geo-mapping for Energy and Minerals (GEM) program at Natural Resources Canada and Yukon Geological Survey. Comments are closed.
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