GEOSCAN Search Results: Fastlink


TitleU-Pb geochronology, geochemistry, and geological setting of Devonian and Eocene granitic intrusions of northern Yukon and adjacent Alaska: site and sample descriptions, data tables, and imagery
AuthorLane, L S; Mortensen, J K; Dover, J H; Thériault, R J; Bell, K; Blenkinsop, J
SourceGeological Survey of Canada, Open File 8496, 2018, 57 pages, (Open Access)
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
RelatedThis publication accompanies Lane, L S; Mortensen, J K; (2018). U-Pb geochronology, Nd-Sm geochemistry, structural setting, and tectonic significance of Late Devonian and Paleogene intrusions in northern Yukon and northeastern Alaska, Canadian Journal of Earth Sciences vol. 56 no. 6
File formatreadme
File formatpdf (Adobe® Reader®); rtf; xlsx (Microsoft® Excel®)
NTS116N; 116O; 116P/03; 116P/04; 116P/05; 116P/06; 116P/11; 116P/12; 116P/13; 116P/14; 117A/02; 117A/03; 117A/04; 117A/05; 117A/06; 117A/07; 117A/10; 117A/11; 117A/12; 117A/13; 117A/14; 117A/15; 117B; 117C; 117D
AreaAlaska; Canada; United States of America
Lat/Long WENS-143.5000 -137.0000 70.0000 67.0000
Subjectsgeochronology; geochemistry; regional geology; economic geology; geophysics; bedrock geology; lithology; igneous rocks; intrusive rocks; granites; syenites; felsic intrusive rocks; metamorphic rocks; metasedimentary rocks; structural features; faults; folds; unconformities; field relations; petrography; tectonic setting; magmatism; intrusions; plutons; cupola; dykes; sills; mineral occurrences; mineral deposits; molybdenum; uranium; tungsten; skarn deposits; structural analyses; thin section microscopy; fabric analyses; microfabric analyses; geophysical interpretations; magnetic interpretations; magnetic anomalies; trace element analyses; major element analyses; minor element geochemistry; samarium geochemistry; neodymium geochemistry; radiometric dating; uranium lead dating; zircon dates; titanite; mass spectrometer analysis; rubidium strontium dating; Paleogene; Eocene; Old Crow Basin; Fitton Granite; Kingak Formation; Hoidahl Cupola; Barn Uplift; Sedgwick Granite; Ammerman Granite; Old Crow Batholith; Schaeffer Granite; Dave Lord Syenite; Bear Mountain Syenite; Bear Mountain Intrusions; datasets; Phanerozoic; Cenozoic; Tertiary; Mesozoic; Cretaceous; Jurassic; Triassic; Paleozoic; Permian; Carboniferous; Devonian; Silurian; Ordovician; Cambrian; Precambrian; Proterozoic
Illustrationslocation maps; geoscientific sketch maps; photographs; photomicrographs; stereonet projections; tables; plots; ternary diagrams
ProgramGEM2: Geo-mapping for Energy and Minerals, Western Arctic Sverdrup Basin
Released2018 12 11
AbstractNew data tables, figures and imagery from northern Yukon and adjacent Arctic Alaska document the field relationships, lithologies, petrography, geochronology and geochemistry of a suite of Late Devonian granites and syenite, as well as an Eocene syenite. These data sets support an interpretation and synthesis of the tectonic implications of these magmatic episodes that will be published in a peer-reviewed journal. Included as Appendix A, is a summary of archival Rb-Sr geochronological datasets that have not been published previously.
Appendix B contains five data tables that provide complete documentation supporting the results of the current study, together with a substantial amount of previously unpublished geochronology and geochemistry data.
Summary(Plain Language Summary, not published)
This publication contains outcrop descriptions, field, sample, and thin section photographs, page figure maps and analytical data relating to an external manuscript currently in production. The external manuscript interprets the significance of the chemistry and isotopic age determinations for a suite of granites across northernmost Yukon and adjacent Alaska. Most of the granites are Devonian in age, between 362.1 and 372.6 million years old. A similar looking intrusion is much younger, at 53 million years old. The ages and chemistry data help to clarify the geological history of this region during Devonian time.