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TitleGeology, Stevenson Ridge (northwest part), Yukon
AuthorRyan, J J; Zagorevski, A; Williams, S P; Roots, C; Ciolkiewicz, W; Hayward, N; Chapman, J B
SourceGeological Survey of Canada, Canadian Geoscience Map 117, 2013, 1 sheet,
PublisherNatural Resources Canada
Edition2, Prelim.
Maps1 map
Map Info.geological, bedrock geology, structural features, 1:100,000
ProjectionUniversal Transverse Mercator Projection, zone 7 (NAD83)
Mediaon-line; digital
RelatedThis publication supercedes Ryan, J J; Zagorevski, A; Williams, S P; Roots, C; Ciolkiewicz, W; Hayward, N; Chapman, J B; (2013). Geology, Stevenson Ridge (northwest part), Yukon, Geological Survey of Canada, Canadian Geoscience Map no. 117, ed. prelim.
File formatreadme
File formatpdf; rtf; shp; xml; xls; JPEG2000
NTS115J/11; 115J/12; 115J/13; 115J/14; 115K/09; 115K/10; 115K/15; 115K/16
AreaStevenson Ridge; Yukon River; Dawson Range
Lat/Long WENS-141.0000 -139.0000 63.0000 62.5000
Subjectsstratigraphy; structural geology; bedrock geology; structural features; folds; folding; metamorphism; deformation; metamorphic rocks; igneous rocks; volcanic rocks; intrusive rocks; sedimentary rocks; marbles; schists; greenstones; granites; sandstones; monzo-granites; Rhyolite Creek Complex; Carmacks Group; Mount Nansen Group; Whitehorse Suite; Pyroxene Mountain suite; Klondike Assemblage; Simpson Range Suite; Snowcap Assemblage; Harzburgite Peak complex; Macauley Ridge formation; Snag Creek suite; Macauley ridge formation; Mirror Creek formation; White River complex; Scottie Creek formation; Cenozoic; Quaternary; Mesozoic; Cretaceous; Jurassic; Triassic; Paleozoic; Permian; Mississippian; Devonian
ProgramMultiple Metals - NW Canadian Cordillera (Yukon, B.C.), GEM: Geo-mapping for Energy and Minerals
Released2013 03 20
AbstractThe northwestern Stevenson Ridge map sheet (parts of NTS 115-J and K) is underlain by Paleozoic to Paleogene rocks that locally host Au mineralization. The backbone of the Dawson Range is underlain by the mid-Cretaceous Whitehorse plutonic suite. Late Devonian metamorphosed volcanic, plutonic and sedimentary rocks of the White River assemblage and the Late Triassic Snag Creek suite gabbro occur southwest of the Dawson Range. These rocks are structurally overlain by a thrust sheet of the Early Permian Harzburgite Peak complex. The north side of the Dawson Range is characterized by Paleozoic rocks typical of the Yukon-Tanana terrane, including Permian Klondike schist, Permian Sulphur Creek plutonic suite and pre-Devonian Snowcap assemblage. The White River assemblage and the Yukon-Tanana terrane are juxtaposed along the post-Triassic Moose Creek thrust, which is partly demarcated by lozenges of peridotite. Late Cretaceous and younger faults occur throughout the area but have only modest offsets.
Summary(Plain Language Summary, not published)
Western Yukon is host to numerous mineral deposits that contain economically important metals such as copper and gold. The distribution of these mineral deposits is controlled by the underlying geology, including rock type and deformation history. This publication presents a new 1:100 000 scale geological map of the northern Stevenson Ridge area that is based on regional mapping and integration of modern geophysical, geochemical and age data. The map identifies distinct groups of rocks that share common origins and histories, each of which have potential to host specific types of mineral deposits. This map represents significant improvement on the understanding of regional geology and mineral deposits in western Yukon. The results of this study are applicable to understanding of the geology and mineral deposits of northern Cordillera in Yukon, British Columbia and Alaska.