Subducted seamounts and recent earthquakes beneath the central Cascadia forearc

Research Article| February 01, 2012 Subducted seamounts and recent earthquakes beneath the central Cascadia forearc Anne M. Tréhu; Anne M. Tréhu 1College of Oceanic and Atmospheric Sciences, Oregon State University, Corvallis, Oregon 97331-5503, USA Search for other works by this author on: GSW Google Scholar Richard J. Blakely; Richard J. Blakely 2U.S. Geological Survey, Menlo Park, California 94025-3591, USA Search for other works by this author on: GSW Google Scholar Mark C. Williams Mark C. Williams 1College of Oceanic and Atmospheric Sciences, Oregon State University, Corvallis, Oregon 97331-5503, USA Search for other works by this author on: GSW Google Scholar Geology (2012) 40 (2): 103–106. https://doi.org/10.1130/G32460.1 Article history received: 13 May 2011 rev-recd: 01 Sep 2011 accepted: 06 Sep 2011 first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Anne M. Tréhu, Richard J. Blakely, Mark C. Williams; Subducted seamounts and recent earthquakes beneath the central Cascadia forearc. Geology 2012;; 40 (2): 103–106. doi: https://doi.org/10.1130/G32460.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search 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 ∼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. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.