| Title | Bedrock geology, (Glacio-) Volcano within the Tuya Formation, at Kawdy Mountain, British Columbia |
| Download | Downloads |
| |
| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Turnbull, M; Russell, J K; Edwards, B R; Porritt, L |
| Source | Geological Survey of Canada, Canadian Geoscience Map 276, 2016, 1 sheet, https://doi.org/10.4095/299109  Open Access |
| Image |  |
| Year | 2016 |
| Publisher | Natural Resources Canada |
| Edition | prelim. |
| Document | serial |
| Lang. | English |
| Maps | 1 map |
| Map Info. | geological, bedrock geology, 1:10,000 |
| Projection | Universal Transverse Mercator Projection, UTM zone 9 (NAD83) |
| Media | on-line; digital |
| File format | readme
|
| File format | pdf; shp; xml; rtf; xls |
| Province | British Columbia |
| NTS | 104J/14NE |
| Area | Kima'Kho Moutain; Kuya-Kawdy plateau |
| Lat/Long WENS | -131.2167 -131.1167 59.0056 58.9556 |
| Subjects | igneous and metamorphic petrology; geochronology; bedrock geology; volcanic rocks; basalts; argon argon dates; intrusive rocks; volcaniclastics; tuffs; breccias; breccia deposits; Pleistocene; Cenozoic;
Quaternary |
| Illustrations | cross-sections; location maps |
| Program | GEM2: Geo-mapping for Energy and Minerals Western Cordillera, Regional porphyry transitions |
| Released | 2016 12 21 |
| Abstract | This 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 ID | 299109 |
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