Abstract: The Finlayson Lake Targeted Geoscience Initiative, conducted jointly by the Geological Survey of Canada and Yukon Geology Program, comprised new geological mapping and till geochemistry in the northern two-thirds of Finlayson Lake map area, in and around the Finlayson Lake massive sulphide district. The goals of the initiative were to document the nature of Yukon-Tanana Terrane in this area, and, as bedrock exposures are sparse, to use till geochemistry to remotely sense new exploration targets.

The new mapping illustrates that much of the area south of the Robert Campbell Highway is underlain by the rock units that host the Fyre Lake, Kudz Ze Kayah and GP4F deposits. These rocks are thrust northwardly over a succession of carbonaceous clastic rocks, chert and felsic meta-volcanic rocks, with potential for syngenetic deposits. The Permian Campbell Range basalt, host of the Ice deposit, unconformably overlies both sequences, and all of these rocks are thrust onto rocks of the North American miogeocline.

Authors: Murphy, D.C., Colpron, M., Roots, C.F., Gordey, S.P., and Abbott, J.G.

Keywords: bedrock mapping, geochemistry, Regional Geology

NTS Mapsheet(s): 105G

Citation: Murphy, D.C., Colpron, M., Roots, C.F., Gordey, S.P., and Abbott, J.G., 2002. Finlayson Lake Targeted Geoscience Initiative (southeastern Yukon), Part 1: Bedrock geology. In: Yukon Exploration and Geology 2001, Emond, D.S., Weston, L.W., and Lewis, L.L. (eds.), Exploration and Geological Sciences Division, Yukon Region, Indian and Northern Affairs Canada, p. 189-207.

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