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Yukon Geological Survey

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Reference Number
YEG1999_20
Title
The magmatic and structural setting of the Brewery Creek gold mine, central Yukon
Reference Type
Indian & Northern Affairs Canada/Department of Indian & Northern Development: Exploration & Geological Services Division
Document Type
Annual Report Paper


General Information

Abstract: The Brewery Creek gold mine (13.3 Mt @ 1.44 g/t Au) is a bulk tonnage, heap leach operation located 57 km east of Dawson City, Yukon. The deposit lies on the northeastern side of the Tintina Fault and within Selwyn Basin.

Gold mineralization is hosted by intrusions of the mid-Cretaceous Tombstone Plutonic Suite (TPS), and Silurian to Carboniferous clastic metasedimentary rocks of the Steel Formation and Earn Group. The sedimentary rocks are faulted and variably folded, however they display poor cleavage development. The TPS intrusions are also faulted and contain rafts of argillaceous sedimentary rock. No regional ductile fabrics were observed to crosscut the intrusions. Five phases of intrusion have been recognized; these are `raft monzonite, feldspar porphyry (FP1), biotite monzonite, a second phase of feldspar porphyry (FP2), and a pyroxenite.

The most important feature at Brewery Creek is a linear zone of monzonite intrusions, faulting and mineralization termed the Reserve trend. This zone trends west-northwest and has a moderate dip to the south. A number of stages and orientations of faulting have been identified along the Reserve trend; lithological relationships suggest a substantial amount of vertical movement occurred post-TPS emplacement and pre- to syn-mineralization.
Authors: Lindsay, M.J., Baker, T., Oliver, N.H.S., Diment, R., and Hart, C.J.R.
Keywords: deposit models, Tombstone Plutonic Suite
NTS Mapsheet(s): 105M, 115P
Citation: Lindsay, M.J., Baker, T., Oliver, N.H.S., Diment, R., and Hart, C.J.R., 2000. The magmatic and structural setting of the Brewery Creek gold mine, central Yukon. In: Yukon Exploration and Geology 1999, Emond, D.S. and Weston, L.W. (eds.), Exploration and Geological Sciences Division, Yukon Region, Indian and Northern Affairs Canada, p. 219-227.

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Report File is .44 MB Download PDF

Location Map

NTS Mapsheet(s): 105M, 115P

Related Occurrences

Name Number Type Status
Brewery Creek 116B 160 Hard-rock Past Producer

Related Publications

Number Relationship Authors Title
YEG1999 Contained By Emond, D.S. and Weston, L.W. (eds.) Yukon Exploration and Geology 1999