Record Details
Subducted seamounts and recent earthquakes beneath the central Cascadia forearc
ScholarsArchive at Oregon State University
| Field | Value |
|---|---|
| Title | Subducted seamounts and recent earthquakes beneath the central Cascadia forearc |
| Names |
Tréhu, Anne M.
(creator) Blakely, Richard J. (creator) Williams, Mark C. (creator) |
| Date Issued | 2012-02 (iso8601) |
| Note | This is the publisher’s final pdf. The published article is copyrighted by Geological Society of America and can be found at: www.geosociety.org/. |
| Abstract | Bathymetry and magnetic anomalies indicate that a seamount on the Juan de Fuca plate has been subducted beneath the central Cascadia accretionary complex and is now located similar to 45 km landward of the deformation front. Passage of this seamount through the accretionary complex has resulted in a pattern of uplift followed by subsidence that has had a profound influence on slope morphology, gas hydrate stability, and sedimentation. Based on potential-field data and a new three-dimensional seismic velocity model, we infer that this is the most recent of several seamounts subducted over the past several million years beneath this segment of Cascadia. More deeply subducted seamounts may be responsible for recent earthquake activity on the plate boundary in this region and for along-strike variations in the thickness of the subduction channel, which may affect coupling across the plate boundary. |
| Genre | Article |
| Topic | Costa Rica |
| Identifier | Trehu, A., Blakely, R., & Williams, M. (2012). Subducted seamounts and recent earthquakes beneath the central cascadia forearc. Geology, 40(2), 103-106. doi: 10.1130/G32460.1 |
