Tectonics of the Mendocino Triple Junction

Research Article| November 01, 1971 Tectonics of the Mendocino Triple Junction ELI A SILVER ELI A SILVER U.S. Geological Survey, 345 Middlefield Road, Menlo Park, California 94025 Search for other works by this author on: GSW Google Scholar GSA Bulletin (1971) 82 (11): 2965–2978. https://doi.org/10.1130/0016-7606(1971)82[2965:TOTMTJ]2.0.CO;2 Article history received: 17 Jun 1970 rev-recd: 13 May 1971 first online: 02 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 ELI A SILVER; Tectonics of the Mendocino Triple Junction. GSA Bulletin 1971;; 82 (11): 2965–2978. doi: https://doi.org/10.1130/0016-7606(1971)82[2965:TOTMTJ]2.0.CO;2 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 SocietyGSA Bulletin Search Advanced Search Abstract Interpretation of reflection profiles and of the magnetic anomaly pattern over the Gorda Basin and Escarpment gives broad agreement with the triple junction model of McKenzie and Morgan (1969). However, the basin has undergone internal deformation, a local departure from rigid plate tectonics, and the escarpment has had a component of underthrusting by the Gorda block. Faults in the Gorda Basin which disturb young turbidites parallel the trends of magnetic anomalies, suggesting deformation of the oceanic crust along lines of primary weakness. The northeast trends of the faults give a constraint on first-motion solutions for earthquakes within the basin and suggest left-lateral slip on the faults. Analysis of the geometry and timing of the Gorda Basin deformation based on the magnetic pattern gives an average gross tectonic strain rate of 10−14/sec. These observations give a measure of the mechanics of deformation of oceanic lithosphere very close to a spreading rise crest. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.