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Yukon Geological Survey

YGS Publication Details


Reference Number
YEG2017_4
Title
New contributions to the bedrock geology of the Mount Freegold district, Dawson Range, Yukon (NTS 115I/2, 6 and 7)
Reference Type
Yukon Geological Survey
Document Type
Annual Report Paper


General Information

Abstract: The Mount Freegold district is an ideal natural laboratory to evaluate the structural and magmatic framework for porphyry, skarn and epithermal mineralization in the Dawson Range. The district is located within a major extensional relay zone of the Big Creek fault system, a regionally significant dextral strike-slip structure in which localized extension facilitated the emplacement of mid to Late Cretaceous magmatic rocks. New mapping defines a previously unrecognized granite pluton at Mount Freegold, as well as the ca. 77 Ma Stoddart pluton, which represents the magmatic roots of hypabyssal intrusive rocks at the Revenue Cu-Mo-Au-Ag deposit and Nucleus Au-Ag-Cu deposit. The relay zone in the Big Creek fault system is partly plugged by the ca. 70 Ma Seymour Creek stock, which is cut by a southern strand of the fault system. Episodic fault movement took place over a minimum 35 m.y. interval during which at least three distinct epochs of magmatic-hydrothermal mineralization occurred.
Authors: Friend, M.A., Allan, M.M. and Hart, C.J.R.
NTS Mapsheet(s): 115I02, 115I06, 115I07
Citation: Friend, M.A., Allan, M.M. and Hart, C.J.R., 2018. New contributions to the bedrock geology of the Mount Freegold district, Dawson Range, Yukon (NTS 115I/2, 6 and 7). In: Yukon Exploration and Geology 2017, K.E. MacFarlane (ed.), Yukon Geological Survey, p. 47-68.

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Location Map

NTS Mapsheet(s): 115I02, 115I06, 115I07

Related Occurrences

Name Number Type Status
Granger 115I 193 Hard-rock Drilled Prospect
Klaus 115I 196 Hard-rock Showing
Granger 115I 050 Hard-rock Drilled Prospect
Kook 115I 087 Hard-rock Anomaly
Gow 115I 195 Hard-rock Drilled Prospect
Blue Sky 115I 198 Hard-rock Drilled Prospect
Discovery D-2 115I 201 Hard-rock Drilled Prospect
Vest Pocket 115I 194 Hard-rock Drilled Prospect
Keirsten South 115I 192 Hard-rock Drilled Prospect
Irene Vein 115I 188 Hard-rock Drilled Prospect
Augusta 115I 169 Hard-rock Deposit
Elephant 115I 120 Hard-rock Anomaly
Castle 115I 051 Hard-rock Showing
Tinta Hill 115I 058 Hard-rock Deposit
Goldy 115I 182 Hard-rock Drilled Prospect
WAu Bx 115I 197 Hard-rock Drilled Prospect
Discovery D-1 115I 200 Hard-rock Drilled Prospect
Whirlwind 115I 189 Hard-rock Showing
Jilly Bob 115I 184 Hard-rock Showing
Drone 115I 190 Hard-rock Showing
Antoniuk 115I 111 Hard-rock Deposit
Margarete 115I 053 Hard-rock Drilled Prospect
Border Zone 115I 179 Hard-rock Showing
Kirsteen 115I 171 Hard-rock Drilled Prospect
Discovery D-3 115I 202 Hard-rock Drilled Prospect
Ridge 115I 181 Hard-rock Drilled Prospect
Lucinda 115I 185 Hard-rock Showing
Amanda 115I 186 Hard-rock Showing
Melissa 115I 187 Hard-rock Showing
Forbes Creek 115I 183 Hard-rock Showing
Cash 115I 037 Hard-rock Deposit
Klazan 115I 038 Hard-rock Drilled Prospect
Com 115I 039 Hard-rock Anomaly
Stoddart 115I 121 Hard-rock Showing
Cabin 115I 172 Hard-rock Prospect
Keirsten 115I 191 Hard-rock Drilled Prospect
Red Fox 115I 052 Hard-rock Drilled Prospect
Whale 115I 112 Hard-rock Showing
Laforma 115I 054 Hard-rock Deposit
1935 Shaft Zone 115I 167 Hard-rock Showing
Revenue West 115I 199 Hard-rock Drilled Prospect
Skarn 115I 170 Hard-rock Drilled Prospect
Liberty 115I 178 Hard-rock Anomaly

Related Publications

Number Relationship Authors Title
YEG2017 Contained By MacFarlane, K.E. (ed.) Yukon Exploration and Geology 2017