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Yukon Geological Survey

YGS Publication Details


Reference Number
YEG2004_16
Title
Reconnaissance geological and geochemical studies of the Joe Mountain Formation, Joe Mountain region (NTS 105D/15), Yukon
Reference Type
Yukon Geological Survey
Document Type
Annual Report Paper


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
Hartless Joe 105D 051 Hard-rock Drilled Prospect
Grumpy 105D 203 Hard-rock Drilled Prospect
Joe Creek 105D 197 Hard-rock Showing

Related Compilations

Compilation Name Feature Type Update Frequency

Related Publications

Number Relationship Authors Title
YEG2004 Contained By Emond, D.S., Lewis, L.L. and Bradshaw, G.D. (eds.) Yukon Exploration and Geology 2004