Structural evolution and rock types of the Slide Mountain and Yukon-Tanana terranes in the Campbell Range, southeastern Yukon Territory

Mapping at 1:50 000 scale in the Campbell Range, Yukon Territory examined the Finlayson Lake fault zone and the Slide Mountain and Yukon-Tanana terranes. Map units identified are: (a)Yukon-Tanana terrane: DTp chlorite-actinolite phyllite, DTa argillite, DTc metachert and slate; (b) Slide Mountain terrane: DPsc and DPsp metachert, argillite, and phyllite, DPsg greenstone, breccia, gabbro, and metasedimentary rocks, DPslg leucogabbro, and DPss serpentinite; and (c) Earn Group: DMec metachert and argillite, and DMes sandstone, siltstone, and shale. Unit DPsg is thrust over DTp and DTa in the west and DPsc in the east. The map pattern of DTc suggests a klippe preserved from erosion by normal faulting along its southern boundary. These structures may represent a flower structure or an originally east-directed thrust sequence disrupted by west-directed back thrusts with continued shortening.