| Title | Using basalt-hosted xenoliths as probes of the composition, structure and rheology of the sub-Cordilleran lithosphere in British Columbia |
| Download | Download (whole publication) |
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| Licence | Please note the adoption of the Open Government Licence - Canada
supersedes any previous licences. |
| Author | Kroner, R K; Chapman, J B ; Russell, J K |
| Source | Targeted Geoscience Initiative: 2017 report of activities, volume 2; by Rogers, N (ed.); Geological Survey of Canada, Open File 8373, 2018 p. 93-100, https://doi.org/10.4095/306604  Open Access |
| Year | 2018 |
| Publisher | Natural Resources Canada |
| Document | open file |
| Lang. | English |
| Media | on-line; digital |
| Related | This publication is contained in Targeted Geoscience
Initiative: 2017 report of activities, volume 2 |
| File format | pdf |
| Province | British Columbia |
| NTS | 82E; 82F/04; 82F/05; 82F/12; 82F/13; 82K/04; 82K/05; 82K/12; 82K/13; 82L; 82M; 83D; 83E; 83L; 92G; 92H; 92I; 92J; 92O; 92P; 93A; 93B; 93G; 93H; 93I; 93J |
| Area | Prince George; Summit Lake; Okanagan; Lightning Peak; Mount Timothy; Lac la Hache |
| Lat/Long WENS | -124.0000 -117.5000 54.6667 49.0000 |
| Subjects | economic geology; structural geology; geochemistry; igneous and metamorphic petrology; mineral deposits; mineral exploration; mineral potential; porphyry deposits; ore mineral genesis; mineralization;
ore controls; crustal studies; crustal structure; lithosphere; mantle; bedrock geology; lithology; igneous rocks; volcanic rocks; mafic volcanic rocks; basalts; xenoliths; intrusive rocks; ultramafic rocks; peridotites; lherzolites; gabbros; granitic
rocks; metamorphic rocks; granulites; quartzites; rheology; electron probe analyses; mass spectrometer analysis; electron diffraction analyses; bulk composition; Canadian Cordillera; Chilcotin Group; Quesnel Terrane; Stikine Terrane; North American
Craton; Okanagan Terrane; Phanerozoic; Cenozoic; Quaternary; Tertiary |
| Illustrations | geoscientific sketch maps; photographs |
| Program | Targeted Geoscience Initiative (TGI-5) Knowledge Management Coordination |
| Program | Targeted Geoscience Initiative (TGI-5) Porphyry systems |
| Released | 2018 03 01 |
| Abstract | This study seeks to illuminate the chemistry, structure, and rheology of the crustal and mantle lithosphere beneath the Canadian Cordillera using crustal and mantle xenoliths entrained in Quaternary to
early Paleogene mafic volcanics. Most of the xenolith-bearing units belong to the Chilcotin Group basalts in southern British Columbia and fall within the Quesnel and Stikine accreted terranes. The sampling locations of Summit Lake north of Prince
George, Lightning Peak in the Okanagan region and Mt. Timothy east of Lac la Hache were selected for the diversity of entrained xenoliths. Ultramafic mantle xenoliths include multiple types of peridotite, with lherzolite the most abundant in all
locations. Crustal xenoliths include gabbro, granitoid, granulite and quartzite.
Pressure and depths of equilibration for the samples will be determined by microprobe analyses of various minerals in the xenoliths. This will be the first step
toward creating a comprehensive petrological cross section of the southern Cordilleran lithosphere. |
| Summary | (Plain Language Summary, not published)
The Targeted Geoscience Initiative (TGI) is directed towards providing next generation knowledge and methods to facilitate more effective targeting of
buried mineral deposits. The program aims to enhance the effectiveness of exploration for Canada¿s major mineral systems by resolving foundational geoscience problems that constrain the geological processes responsible for the liberation metals from
their source region, transportation of these ore metals and control their eventual deposition. TGI supports projects on gold, Ni-Cr-PGE, porphyry-style mineralization, uranium and volcanic- and sedimentary-hosted base metal mineralization ore
systems, with each project divided into subprojects focused on resolving specific knowledge gaps by integrating data and studies from multiple sites across Canada. Herein, we present interim results and interpretations from a selection of the
research activities currently being conducted under the auspices of TGI. |
| GEOSCAN ID | 306604 |
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