Abstract: The high level bench gravels of the Klondike region were first described by R.G. McConnell. He divided the gravels into two formations; the older and stratigraphically lower White Channel gravel, and the younger Klondike or high level river gravel. The White Channel gravel occurs on bedrock benches composed of metasedimentary and metavolcanic rocks, and is usually 50 to 100 metres above present day stream courses. McConnell further subdivided the White Channel gravel into interbedded white and yellow gravel units. This suggests contemporaneous deposition, with the white gravel unit containing important concentrations of placer gold.

A distinct alteration zone is recognized in White Channel clastic sediments at Dago Hill. Templeman-Kluit suggested that increased gold values at the White Channel gravel and bedrock contact were directly linked to the alteration of the gravel and bedrock. This idea prompted a study by the authors during the summer of 1983 to determine the relationship (if any) of the alteration zones to the deposition of gold.

Authors: Dufresne, M.B. and Morison, S.R.

Map Scale: 1 : 0

NTS Mapsheet(s): 115O

Citation: Dufresne, M.B. and Morison, S.R., 1985. Stratigraphy and alteration of the White Channel gravel at Dago Hill, a progress report, Klondike area, Yukon. In: Yukon Exploration and Geology 1983, Yukon Geological Survey, Indian & Northern Affairs Canada/Department of Indian & Northern Development: Exploration & Geological Services Division.

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