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TitleLate cenozoic geology, Ancient Pacific Margin NATMAP Project, report 3: a re-evaluation of glacial limits in the Stewart River basin of Stewart River map area, Yukon Territory
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AuthorJackson, L E, Jr; Shimamura, K; Huscroft, C A
SourceGeological Survey of Canada, Current Research (Online) no. 2001-A3, 2001, 17 pages, https://doi.org/10.4095/211987 (Open Access)
Image
Year2001
PublisherNatural Resources Canada
Documentserial
Lang.English
Mediapaper; on-line; digital
RelatedThis publication is contained in Geological Survey of Canada; (2001). Current Research 2001, winter release, Geological Survey of Canada, Current Research no. 2001
File formatpdf
ProvinceYukon
NTS115O/06; 115O/11
AreaStewart River; Cordillera
Lat/Long WENS-139.5000 -139.0000 63.7500 63.2500
Subjectssurficial geology/geomorphology; sedimentology; economic geology; glaciation; gravels; lithology; erratics; stream sediment samples; mineral potential; gold; placer deposits; Stewart River Basin; glacial limits; Cenozoic
Illustrationssketch maps; histograms; photographs
ProgramAncient Pacific Margin NATMAP Project
Released2001 01 01
AbstractInvestigation of stream-gravel lithology, distribution of erratics and high terraces, and natural exposures of terrace gravels along Stewart River have generally corroborated the all-time limits of glaciation mapped by H.S. Bostock in the Stewart River basin of the Stewart River map area. Stream gravels beyond these limits completely lack lithologies associated with the Selwyn Basin. Placer deposits beyond these glacial limits formed from fluvial con- centration of gold sources occurring in those basins. The upper reaches of streams spanning glacial limits may contain undisturbed placers, whereas lower reaches may contain placers formed following glaciation, and buried placers. Bostock's unpublished notes have proven to be a valuable aid in mapping the surficial geology of the area.
GEOSCAN ID211987