Evidence for active subduction below western Panama

Research Article| June 01, 1991 Evidence for active subduction below western Panama Jelle Zeilinga de Boer; Jelle Zeilinga de Boer 1Department of Earth and Environmental Sciences, Wesleyan University, Middletown, Connecticut 06457 Search for other works by this author on: GSW Google Scholar Marc J. Defant; Marc J. Defant 2Department of Geology, University of South Florida, Tampa, Florida 33620 Search for other works by this author on: GSW Google Scholar Robert H. Stewart; Robert H. Stewart 2Department of Geology, University of South Florida, Tampa, Florida 33620 Search for other works by this author on: GSW Google Scholar Hervé Bellon Hervé Bellon 3Laboratoire de Géochimie et de Géochronologie et UA 1278, Université de Bretagne Occidentale, 29287 Brest, France Search for other works by this author on: GSW Google Scholar Author and Article Information Jelle Zeilinga de Boer 1Department of Earth and Environmental Sciences, Wesleyan University, Middletown, Connecticut 06457 Marc J. Defant 2Department of Geology, University of South Florida, Tampa, Florida 33620 Robert H. Stewart 2Department of Geology, University of South Florida, Tampa, Florida 33620 Hervé Bellon 3Laboratoire de Géochimie et de Géochronologie et UA 1278, Université de Bretagne Occidentale, 29287 Brest, France Publisher: Geological Society of America First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (1991) 19 (6): 649–652. https://doi.org/10.1130/0091-7613(1991)019<0649:EFASBW>2.3.CO;2 Article history First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Jelle Zeilinga de Boer, Marc J. Defant, Robert H. Stewart, Hervé Bellon; Evidence for active subduction below western Panama. Geology 1991;; 19 (6): 649–652. doi: https://doi.org/10.1130/0091-7613(1991)019<0649:EFASBW>2.3.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 SocietyGeology Search Advanced Search Abstract Widespread arc tholeiitic and calc-alkaline volcanism characterized the geologic evolution of western Panama and southeastern Costa Rica in middle to late Miocene and Quaternary time. Volcanism was and is clearly associated with subduction of Nazca lithosphere. Geochemical data suggest that formation of mantle-wedge-derived melts and their differentiated products predominated during Miocene time, whereas slab-derived melts were generated in the Quaternary. This difference in magma chemistry is attributed to a change in the thermal regime of the Nazca lithosphere, which may be related to emplacement of the Galapagos plume. 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.