Mantle flow through the Northern Cordilleran slab window revealed by volcanic geochemistry
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Bibliographic record
Abstract
Research Article| March 01, 2011 Mantle flow through the Northern Cordilleran slab window revealed by volcanic geochemistry Derek J. Thorkelson; Derek J. Thorkelson * Department of Earth Sciences, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada *E-mail: dthorkel@sfu.ca. Search for other works by this author on: GSW Google Scholar Julianne K. Madsen; Julianne K. Madsen Department of Earth Sciences, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada Search for other works by this author on: GSW Google Scholar Christa L. Sluggett Christa L. Sluggett Department of Earth Sciences, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information Derek J. Thorkelson * Department of Earth Sciences, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada Julianne K. Madsen Department of Earth Sciences, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada Christa L. Sluggett Department of Earth Sciences, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada *E-mail: dthorkel@sfu.ca. Publisher: Geological Society of America Received: 26 Jun 2010 Revision Received: 05 Oct 2010 Accepted: 11 Oct 2010 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2011 Geological Society of America Geology (2011) 39 (3): 267–270. https://doi.org/10.1130/G31522.1 Article history Received: 26 Jun 2010 Revision Received: 05 Oct 2010 Accepted: 11 Oct 2010 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 Derek J. Thorkelson, Julianne K. Madsen, Christa L. Sluggett; Mantle flow through the Northern Cordilleran slab window revealed by volcanic geochemistry. Geology 2011;; 39 (3): 267–270. doi: https://doi.org/10.1130/G31522.1 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 The Northern Cordilleran slab window formed beneath western Canada concurrently with the opening of the Californian slab window beneath the southwestern United States, beginning in Late Oligocene–Miocene time. A database of 3530 analyses from Miocene–Holocene volcanoes along a 3500-km-long transect, from the northern Cascade Arc to the Aleutian Arc, was used to investigate mantle conditions in the Northern Cordilleran slab window. Using geochemical ratios sensitive to tectonic affinity, such as Nb/Zr, we show that typical volcanic arc compositions in the Cascade and Aleutian systems (derived from subduction-hydrated mantle) are separated by an extensive volcanic field with intraplate compositions (derived from relatively anhydrous mantle). This chemically defined region of intraplate volcanism is spatially coincident with a geophysical model of the Northern Cordilleran slab window. We suggest that opening of the slab window triggered upwelling of anhydrous mantle and displacement of the hydrous mantle wedge, which had developed during extensive early Cenozoic arc and backarc volcanism in western Canada. High heat flow throughout the western Canadian Cordillera is broadly coincident with the field of intraplate volcanism and is linked to slab window-induced mantle upwelling. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
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Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.077 | 0.002 |
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