Are the regional variations in Central American arc lavas due to differing basaltic versus peridotitic slab sources of fluids?

Research Article| November 01, 2002 Are the regional variations in Central American arc lavas due to differing basaltic versus peridotitic slab sources of fluids? Lars H. Rüpke; Lars H. Rüpke 1GEOMAR Research Center, Wischhofstrasse 1-3, 24148 Kiel, Germany Search for other works by this author on: GSW Google Scholar Jason Phipps Morgan; Jason Phipps Morgan 1GEOMAR Research Center, Wischhofstrasse 1-3, 24148 Kiel, Germany Search for other works by this author on: GSW Google Scholar Matthias Hort; Matthias Hort 1GEOMAR Research Center, Wischhofstrasse 1-3, 24148 Kiel, Germany Search for other works by this author on: GSW Google Scholar James A.D. Connolly James A.D. Connolly 2Earth Science Department, Swiss Federal Institute of Technology, 8092 Zurich, Switzerland Search for other works by this author on: GSW Google Scholar Author and Article Information Lars H. Rüpke 1GEOMAR Research Center, Wischhofstrasse 1-3, 24148 Kiel, Germany Jason Phipps Morgan 1GEOMAR Research Center, Wischhofstrasse 1-3, 24148 Kiel, Germany Matthias Hort 1GEOMAR Research Center, Wischhofstrasse 1-3, 24148 Kiel, Germany James A.D. Connolly 2Earth Science Department, Swiss Federal Institute of Technology, 8092 Zurich, Switzerland Publisher: Geological Society of America Received: 08 Apr 2002 Revision Received: 18 Jul 2002 Accepted: 19 Jul 2002 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2002) 30 (11): 1035–1038. https://doi.org/10.1130/0091-7613(2002)030<1035:ATRVIC>2.0.CO;2 Article history Received: 08 Apr 2002 Revision Received: 18 Jul 2002 Accepted: 19 Jul 2002 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Lars H. Rüpke, Jason Phipps Morgan, Matthias Hort, James A.D. Connolly; Are the regional variations in Central American arc lavas due to differing basaltic versus peridotitic slab sources of fluids?. Geology 2002;; 30 (11): 1035–1038. doi: https://doi.org/10.1130/0091-7613(2002)030<1035:ATRVIC>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 SocietyGeology Search Advanced Search Abstract Central American arc volcanism shows strong regional trends in lava chemistry that result from differing slab contributions to arc melting. However, the mechanism that transfers slab-derived trace elements into the mantle wedge remains largely unknown. By using a dynamic model for mantle flow and fluid release, we model the fate of three different slab-fluid sources: sediment, ocean crust, and serpentinized mantle. In the open subarc system, sediments lose almost all their highly fluid mobile elements by ∼50 km depth, so other fluid sources are necessary to explain the slab signal in arc-lava compositions. The well-documented transition from lavas with a strong geochemical slab signature (i.e., high Ba/La ratios) found in Nicaragua to lavas with a weaker slab signature (i.e., low Ba/La ratios) erupted in Costa Rica seems easiest to produce by a higher fraction of serpentine-hosted fluids released from the deeply faulted, highly serpentinized lithosphere subducting beneath Nicaragua than from the less deeply faulted, thicker, amphibolitic oceanic-crust and oceanic-plateau lithosphere subducting beneath Costa Rica. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.