Lithoprobe crustal reflection cross section of the southern Canadian Cordillera, 1, Foreland thrust and fold belt to Fraser River Fault

Tectonics ◽  
1992 ◽  
Vol 11 (1) ◽  
pp. 12-35 ◽  
Author(s):  
Frederick A. Cook ◽  
John L. Varsek ◽  
Ronald M. Clowes ◽  
Ernest R. Kanasewich ◽  
Carl S. Spencer ◽  
...  
Keyword(s):  
Cross Section ◽  
Canadian Cordillera ◽  
Fraser River ◽  
Fold Belt ◽  
Crustal Reflection

Kinematic retro-modelling of a cross-section through a thrust-and-fold belt: the Western Irish Namurian Basin

2011 ◽  
Vol 349 (1) ◽  
pp. 61-76 ◽  
Author(s):  
David C. Tanner ◽  
Frithjof A. Bense ◽  
Gabriele Ertl
Keyword(s):  
Cross Section ◽  
Fold Belt

Cross-strike potential-field anomalies in the Canadian Cordillera

2003 ◽  
Vol 40 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Frederick A Cook ◽  
C Elissa Lynn ◽  
Kevin W Hall
Keyword(s):  
Potential Field ◽  
Volcanic Rocks ◽  
Canadian Cordillera ◽  
Western Canada ◽  
Fraser River ◽  
Northern Limit ◽  
Linear Feature ◽  
Directional Filtering ◽  
Major Implication ◽  
Thrust Sheets

Application of bandpass and directional filtering to potential-field maps of western Canada has led to the discovery of regionally extensive anomalies crossing the northwest strike of Cordilleran structures. The most prominent of these, the Steamboat–Fraser trend, is a north–south-striking feature that projects from the foreland belt in northeastern British Columbia, where it becomes subparallel to anomalies east of the Mackenzie Mountains, southward to the northern limit of the Fraser River strike-slip fault, a distance of about 600 km. Within the hinterland of the Cordillera, the trend appears to spatially correlate with the margins of some Tertiary volcanics. The northeasternmost, and thus most cratonward, Tertiary volcanics are located on the northern projection of the trend. The trend may thus be interpreted as either late, post-orogenic intrusives (e.g., dikes and related volcanic rocks) that are only partially exposed, as pre-orogenic (pre-Mesozoic) features (e.g., faults, dikes) in the crust that were overridden by the Cordilleran thrust sheets, or a combination of these. Although it is not possible to determine which of these (pre- or post-orogenic) is appropriate for the trend, the eventual choice has important implications for the structure and evolution of this part of the Cordillera. If the source of the anomalies is pre-orogenic, a major implication is that Precambrian Shield rocks would be present at depth beneath the southern Canadian Cordillera as far west as the Fraser River fault. Alternatively, if the source is post-orogenic, it represents an anomalously linear feature that has no obvious expression on the surface other than a poorly defined spatial correlation with the margins of some Tertiary volcanics.

Lithoprobe crustal reflection structure of the Southern Canadian Cordillera 2: Coast mountains transect

Tectonics ◽  
1993 ◽  
Vol 12 (2) ◽  
pp. 334-360 ◽  
Author(s):  
John L. Varsek ◽  
Frederick A. Cook ◽  
Ronald M. Clowes ◽  
J. Murray Journeay ◽  
James W. H. Monger ◽  
...  
Keyword(s):  
Canadian Cordillera ◽  
Coast Mountains ◽  
Crustal Reflection
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