Arc Magmatic Tempos: Gathering the Evidence

Research Article| April 01, 2015 Arc Magmatic Tempos: Gathering the Evidence Scott R. Paterson; Scott R. Paterson 1University of Southern California, Department of Earth SciencesLos Angeles, CA 90089, USAE-mail: paterson@usc.edu Search for other works by this author on: GSW Google Scholar Mihai N. Ducea Mihai N. Ducea 2University of Arizona, Department of GeosciencesTucson, AZ 85721, USAE-mail: ducea@email.arizona.edu; University of Bucharest, Department of Geology and GeophysicsBucharest, Romania Search for other works by this author on: GSW Google Scholar Elements (2015) 11 (2): 91–98. https://doi.org/10.2113/gselements.11.2.91 Article history first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Scott R. Paterson, Mihai N. Ducea; Arc Magmatic Tempos: Gathering the Evidence. Elements 2015;; 11 (2): 91–98. doi: https://doi.org/10.2113/gselements.11.2.91 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 SocietyElements Search Advanced Search Abstract In this issue of Elements we explore the characteristics, potential causes, and implications of episodic magmatism in arcs. A comparison of U–Pb bedrock and detrital zircon ages in arcs with independent calculations of volumetric magma addition rates (MARs) indicates that the former nicely track the episodic temporal histories of arc magmatism but not MARs. MAR estimates indicate that 100–1000 times more magmatism is added to continental arcs during flare-ups than during lulls and result in plutonic/volcanic ratios of >30/1. Episodic arc magmatism may result from external forcing on arc systems caused by events outside the arc and/or from internal cyclic processes driven by feedback between linked tectonic and magmatic processes within the arc. Along and across arc strike, changes and asymmetries in magmatic, tectonic, and geochemical histories provide important constraints for evaluating these poorly understood driving mechanisms. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.