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TitleGeology, Stevenson Ridge (northeast 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 116, 2013, 1 sheet,
PublisherNatural Resources Canada
Maps1 map
Map Info.geological, bedrock geology, structural features, 1:100,000
ProjectionUniversal Transverse Mercator Projection, zone 7 (NAD83)
Mediaon-line; digital
RelatedThis publication is superceded by Ryan, J J; Zagorevski, A; Williams, S P; Roots, C; Ciolkiewicz, W; Hayward, N; Chapman, J B; (2013). Geology, Stevenson Ridge (northeast part), Yukon, Geological Survey of Canada, Canadian Geoscience Map no. 116, ed. 2, Prelim.
File formatreadme
File formatpdf; rtf; shp; xml; JPEG2000
NTS115I/05; 115I/12; 115I/13; 115J/07; 115J/08; 115J/09; 115J/10; 115J/15; 115J/16; 115O/01; 115O/02; 115P/04
AreaStevenson Ridge; Yukon River
Lat/Long WENS-139.0000 -137.5000 63.1000 62.3667
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; Selkirk Volcanics; Rhyolite Creek Complex; Carmacks Group; Casino Suite; Mount Nansen Group; Whitehorse Plutonic suite; Aishihik Plutonic suite; Semenof Formation; Simpson Range Suite; Snowcap Assemblage; 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 04 (08:30)
AbstractThe northeastern Stevenson Ridge map sheet (parts of NTS 115-J, I, P and O) is underlain by Paleozoic to Paleogene rocks that locally host Cu-Au porphyry and Au mineralization. The southwestern part of the area is dominated by the mid-Cretaceous Whitehorse plutonic suite which forms the backbone of the Dawson Range Mountains. The north side of the Dawson Range comprises rocks typical of the Yukon-Tanana terrane, including a belt of Permian Klondike schist (metavolcanic rocks), Permian Sulphur Creek plutonic suite and pre-Devonian Snowcap assemblage metasedimentary rocks. The northeast side of the area is dominated by the Mississippian Simpson Range plutonic suite that is intruded by the Triassic Pyroxene Mountain suite and early Jurassic Aishihik suite. The Mississippian to Jurassic rocks are thrust over the Snowcap assemblage along the post-Triassic Yukon River thrust. 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.