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TitleBedrock geology, (Glacio-) Volcano within the Tuya Formation, at Kawdy Mountain, British Columbia
DownloadDownloads
AuthorTurnbull, M; Russell, J K; Edwards, B R; Porritt, L
SourceGeological Survey of Canada, Canadian Geoscience Map 276, 2016, 1 sheet, https://doi.org/10.4095/299109
Year2016
PublisherNatural Resources Canada
Editionprelim.
Documentserial
Lang.English
Maps1 map
Map Info.geological, bedrock geology, 1:10,000
ProjectionUniversal Transverse Mercator Projection, zone 9 (NAD83)
Mediaon-line; digital
File formatreadme
File formatpdf; shp; xml; rtf; xls
ProvinceBritish Columbia
NTS104J/14NE
AreaKima'Kho Moutain; Kuya-Kawdy plateau
Lat/Long WENS-131.2167 -131.1167 59.0056 58.9556
Subjectsigneous and metamorphic petrology; geochronology; bedrock geology; volcanic rocks; basalts; argon argon dates; intrusive rocks; volcaniclastics; tuffs; breccias; breccia deposits; Pleistocene; lapilli; Cenozoic; Quaternary
Illustrationscross-sections; location maps
ProgramWestern Cordillera, Regional porphyry transitions, GEM2: Geo-mapping for Energy and Minerals
Image
Released2016 12 21
AbstractThis volcano, informally named Kima'Kho, is one of more than 30 Pleistocene volcanoes on the Tuya-Kawdy plateau of northern British Columbia that record interactions with the Cordilleran ice sheet. This basaltic glaciovolcano features deposits resulting from explosive and effusive eruptions at 1.9 Ma and hosts multiple passage zones (transition surfaces between subaqueous and subaerial deposits (Russell et al., 2013)). Lithofacies include explosive lapilli tuff cone-forming deposits dominating the southern flanks of the edifice, which are partially overlain to the north by lava-fed deltas comprising lavas and tuff-breccia. Late-stage intrusions are identified by geological field relationships and 40Ar/39Ar geochronology. Explosive and effusive deposits show textural and stratigraphical indicators that delineate 'passage zones'. Six prominent passage zones record depth fluctuations of ~160 m in the englacial lake. Based on estimates of maximum lake depths, the reconstructed minimum ice thickness is ~440 m.
Summary(Plain Language Summary, not published)
Kima'Kho is one of more than 30 Pleistocene volcanoes on the Tuya-Kawdy plateau of northern British Columbia that record interactions with the Cordilleran ice sheet. This basaltic glaciovolcano features deposits resulting from explosive and effusive eruptions at 1.9 Ma and hosts multiple passage zones. Lithofacies include explosive lapilli tuff cone-forming deposits dominating the southern flanks of the edifice, which are partially overlain to the north by lava-fed deltas comprising lavas and tuff-breccia. Late-stage intrusions are identified by geological field relationships and Ar-Ar geochronology. Explosive and effusive deposits show textural and stratigraphical indicators that delineate 'passage zones' (transition surfaces between subaqueous and subaerial deposits). Six prominent passage zones record depth fluctuations of ~160m in the englacial lake. Based on estimates of maximum lake depths, the reconstructed minimum ice thickness is ~440m.
GEOSCAN ID299109