Abstract: Results of surficial geology investigations in Wellesley basin and the Nisling Range can be summarized into four main highlights, which have implications for exploration, development and infrastructure in the region: 1) in contrast to previous glacial-limit mapping for the St. Elias Mountains lobe, no evidence for the late Pliocene/early Pleistocene pre-Reid glacial limits was found in the study area; 2) placer potential was identified along the Reid glacial limit where a significant drainage diversion occurred for Grayling Creek; 3) widespread permafrost was encountered in the study area including near-continuous veneers of sheet-wash; and 4) a monitoring program was initiated at a recently active landslide which has potential to develop into a catastrophic failure that could damage the White River bridge on the Alaska Highway.

Authors: Bond, J.D., Lipovsky, P.S., and von Gaza, P.

Keywords: glacial-limit mapping, natural hazards, Permafrost, placer potential

NTS Mapsheet(s): 115G, 115J

Citation: Bond, J.D., Lipovsky, P.S., and von Gaza, P., 2008. Surficial geology investigations in Wellesley basin and Nisling Range, southwest Yukon. In: Yukon Exploration and Geology 2007, Emond, D.S., Blackburn, L.R., Hill, R.P., and Weston, L.H. (eds.), Yukon Geological Survey, p. 125-138.

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