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Yukon Geological Survey

YGS Publication Details


Reference Number
YEG1994-pg105
Title
Interpretation of an Airborne Multiparameter Geophysical Survey of the Northern Dawson Range, Central Yukon: A Progress Report
Reference Type
Indian & Northern Affairs Canada/Department of Indian & Northern Development: Exploration & Geological Services Division
Document Type
Annual Report Paper


General Information

Abstract: Much of the Yukon-Tanma Terrane escaped Pleistocene glaciation with the result that there is <1% outcrop across much of the terrane and weathered rock commonely extends to depths of >75m. Weathering has in many cases removed all obvious signs of mineralization and has resulted in the dispersion of soluble metals in the near surface. For these reasons, exploration based on traditional prospecting methods and soil geochemical surveys has met with limited success. Geological mapping is hindered by the lack of exposure and by the complex geology. To address these problems a detailed airborne geological sruvery, combining gamma ray spectrometric, magnetic and VLF sesors, was flown in the Dawson Range, central Yukon Tanana Terrane. Spectrometric data were used to determine the average surface concentration of potassium (K), uranium (U), and thorium (Th). Lithological units are characterized by relatively consistent geochemical signatures permitting improved geological mapping based on the distribution of spectrometric domains. Alteration halves, commonly characterized by the addition of K and magnetite, are identifiable as areas of low Th'K rations and as total field magnetic highs.
Authors: Johnston, S.T. and Shives, R.B.K.
Keywords: geophysics
Map Scale: 1 : 0
NTS Mapsheet(s): 115I, 115J
Citation: Johnston, S.T. and Shives, R.B.K., 1995. Interpretation of an Airborne Multiparameter Geophysical Survey of the Northern Dawson Range, Central Yukon: A Progress Report. In: Yukon Exploration and Geology 1994, Yukon Geological Exploration , Indian & Northern Affairs Canada/Department of Indian & Northern Development: Exploration & Geological Services Division, 105.

Downloads

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Report File is 8.04 MB Download PDF

Location Map

NTS Mapsheet(s): 115I, 115J

Related Occurrences

Name Number Type Status
Guess 115J 011 Hard-rock Anomaly
Phelps 115I 032 Hard-rock Showing
Tad/Toro 115I 031 Hard-rock Drilled Prospect

Related Publications

Number Relationship Authors Title
YEG1994 Contained By Yukon Exploration and Geological Services Yukon Exploration and Geology 1994