General Information
Abstract: The Joe Mountain area of the Yukon contains Middle Triassic to Upper Triassic volcanic, sedimentary and intrusive rocks of the Stikine Terrane. The Ladinian (~237 to 228 Ma) rocks of the Joe Mountain Formation of Stikinia are divided into four units, including: 1) a lowermost mafic-ultramafic complex (mTJM4); 2) a lower basalt-flow-dominated unit (mTJM3); 3) a volcaniclastic- and sedimentary-rockdominated unit; and 4) and uppermost unit of black pillow basalts and volcaniclastic rocks (mTJM4). In the Joe Mountain Formation there is a general increase in the abundance of volcaniclastic and sedimentary material, and a decrease in flow material, away from Joe Mountain suggesting that Joe Mountain is a volcanic centre. Hematite-magnetite iron formation was discovered in 2004 interlayered with unit mTJM3 basalts. These iron formations have anomalous metal concentrations, but more importantly, have hydrothermal geochemical signatures (e.g., high Fe/Al ratios) similar to volcanogenic massive sulphide-associated iron formations globally.
Authors: Piercey, S.J.
Keywords: Geological Mapping, Stikine Terrane
NTS Mapsheet(s): 105D15
Citation: Piercey, S.J., 2005. Reconnaissance geological and geochemical studies of the Joe Mountain Formation, Joe Mountain region (NTS 105D/15), Yukon. In: Yukon Exploration and Geology 2004, Emond, D.S., Lewis, L.L., and Bradshaw, G.D. (eds.), Yukon Geological Survey, p. 213-226.
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Location Map
NTS Mapsheet(s): 105D15
Related Occurrences
Name | Number | Type | Status |
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Hartless Joe | 105D 051 | Hard-rock | Drilled Prospect |
Grumpy | 105D 203 | Hard-rock | Drilled Prospect |
Joe Creek | 105D 197 | Hard-rock | Showing |
Related Compilations
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Related Publications
Number | Relationship | Authors | Title |
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YEG2004 | Contained By | Emond, D.S., Lewis, L.L. and Bradshaw, G.D. (eds.) | Yukon Exploration and Geology 2004 |