Lithospheric structure across the Canadian cordillera of Northeastern British Columbia from seismic refraction and potential field data ...
The region of northeastern British Columbia includes the transition from cratonic North America to the deformed Canadian Cordillera. While geological mapping has progressed for over 120 years in the northern Cordillera, the subsurface has remained terra incognita as few geophysical surveys have been...
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| Format: | Text |
| Language: | English |
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University of British Columbia
2009
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| Online Access: | https://dx.doi.org/10.14288/1.0089503 https://doi.library.ubc.ca/10.14288/1.0089503 |
| Summary: | The region of northeastern British Columbia includes the transition from cratonic North America to the deformed Canadian Cordillera. While geological mapping has progressed for over 120 years in the northern Cordillera, the subsurface has remained terra incognita as few geophysical surveys have been conducted. The SNoRE '97 seismic refraction/wideangle reflection (R/WAR) survey was carried out to determine the velocity structure of the lithosphere in northwestern Canada. It sampled four separate seismic profiles along the three corridors of the LITHOPROBE SNorCLE transect. This thesis focuses on the results for Line 21. From east to west, the line begins in the Proterozoic Fort Simpson magmatic arc terrane, crosses the accreted Nahanni terrane, transects the Foreland Belt and samples the edge of the Omineca Belt just west of the Tintina Fault. The refraction data set shows good signal-to-noise ratios; primary phases (Pg, PmP and Pn) are clearly observed for most shots. A velocity structural model is achieved ... |
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