The Cascadia Subduction Zone: Two contrasting models of lithospheric structure
Physics and Chemistry of the Earth
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Abstract
The Pacific margin of North America is one of the most complicated regions in the world in terms of its structure and present day geodynamic regime. The aim of this work is to develop a better understanding of lithospheric structure of the Pacific Northwest, in particular the Cascadia subduction zone of Southwest Canada and Northwest USA. The goal is to compare and contrast the lithospheric density structure along two profiles across the subduction zone and to interpet the differences in terms of active processes. The subduction of the Juan de Fuca plate beneath North America changes markedly along the length of the subduction zone, notably in the angle of subduction, distribution of earthquakes and volcanism, goelogic and seismic structure of the upper plate, and regional horizontal stress. To investigate these characteristics, we conducted detailed density modeling of the crust and mantle along two transects across the Cascadia subduction zone. One crosses Vancouver Island and the Canadian margin, the other crosses the margin of central Oregon.
Suggested Citation
Romanyuk, T., Blakely, R., and Mooney, W.D., 1998, The Cascadia Subduction Zone: Two contrasting models of lithospheric structure: Physics and Chemistry of the Earth, v. 23, no. 3, p. 297-301, https://doi.org/10.1016/S0079-1946(98)00028-7.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | The Cascadia Subduction Zone: Two contrasting models of lithospheric structure |
| Series title | Physics and Chemistry of the Earth |
| DOI | 10.1016/S0079-1946(98)00028-7 |
| Volume | 23 |
| Issue | 3 |
| Year Published | 1998 |
| Language | English |
| Publisher | Elsevier |
| Contributing office(s) | Earthquake Science Center |
| Description | 5 p. |
| First page | 297 |
| Last page | 301 |
| Country | United States, Canada |
| State | Oregon, Washington, British Columbia |