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TitleNeogene structural elements of northern Cascadia, British Columbia
DownloadDownload (whole publication)
LicencePlease note the adoption of the Open Government Licence - Canada supersedes any previous licences.
AuthorJourneay, J M; van Ulden, J
SourceCordillera and Pacific margin / Interior Plains and Arctic Canada/Cordillère et marge du Pacifique / Plaines intérieures et région arctique du Canada; by Geological Survey of Canada; Geological Survey of Canada, Current Research no. 1998-A/B, 1998 p. 195-206, Open Access logo Open Access
PublisherNatural Resources Canada
Mediapaper; on-line; digital
RelatedThis publication is contained in Cordillera and Pacific margin / Interior Plains and Arctic Canada
File formatpdf
ProvinceBritish Columbia
NTS92G; 92H; 92I; 92J
AreaCascadia; Vancouver; Kamloops; Lillooet; Pemberton; Lytton
Lat/Long WENS-124.0000 -120.0000 51.0000 49.0000
Subjectsstructural geology; tectonics; faults; structural features; tectonic history; fracture zones; dykes; depositional environment; deformation; Neogene; Pemberton volcanic belt; Garibaldi volcanic belt; Tertiary
Illustrationssketch maps; analyses
Released1998 03 01
AbstractBrittle structures in the Coast Mountain region of northern Cascadia record a history of inhomogeneous deformation that may shed light on the Neogene crustal response to oblique subduction and dextral transcurrent faulting along the Cordilleran plate margin of western North America. Structures in the intra-arc and backarc regions record an older Paleogene history of dextral transpression, and a Neogene history of orogen-parallel compression that likely reflects distributed Pacific/North American plate motions, and the effects of mechanical buttressing at the leading edge of the southern Cascadia forearc. Structures in the northern Cascadia forearc record effects of both orogen-normal and orogen-parallel compression, likely associated with oblique subduction of the Juan de Fuca plate. The pattern and history of strain partitioning provide an important framework for natural hazards assessment, and for exploration of natural resources that may be localized, in part, by brittle faulting and fluid migration in the upper crust.

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