Partial assimilative recycling of the mafic plutonic roots of arc volcanoes: An example from the Chilean Andes

Research Article| September 01, 2004 Partial assimilative recycling of the mafic plutonic roots of arc volcanoes: An example from the Chilean Andes Michael A. Dungan; Michael A. Dungan 1Section of Earth Sciences, University of Geneva, 13 rue des Maraîchers, Geneva, Switzerland Search for other works by this author on: GSW Google Scholar Jon Davidson Jon Davidson 2Department of Earth Sciences, University of Durham, Durham DH1 3LE, UK Search for other works by this author on: GSW Google Scholar Author and Article Information Michael A. Dungan 1Section of Earth Sciences, University of Geneva, 13 rue des Maraîchers, Geneva, Switzerland Jon Davidson 2Department of Earth Sciences, University of Durham, Durham DH1 3LE, UK Publisher: Geological Society of America Received: 19 Apr 2004 Revision Received: 29 Apr 2004 Accepted: 30 Apr 2004 First Online: 03 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2004) 32 (9): 773–776. https://doi.org/10.1130/G20735.1 Article history Received: 19 Apr 2004 Revision Received: 29 Apr 2004 Accepted: 30 Apr 2004 First Online: 03 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 Michael A. Dungan, Jon Davidson; Partial assimilative recycling of the mafic plutonic roots of arc volcanoes: An example from the Chilean Andes. Geology 2004;; 32 (9): 773–776. doi: https://doi.org/10.1130/G20735.1 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 At long-lived arc volcanic centers, open-system interactions between new magma and the plutonic roots of the arc will increase with time relative to interactions with older crust. Assimilative recycling of mafic plutonic arc roots will have different isotopic consequences than incorporation of aged continental crust. In the Tatara–San Pedro complex, 30 comagmatic basaltic lavas are characterized by xenocrysts and microxenoliths of olivine, augite, and plagioclase derived from solidified cumulates, wide but poorly correlated ranges of incompatible and compatible major and trace elements, and limited isotopic variability. This mineralogical-chemical signature reflects assimilation wherein grain-boundary melting and disaggregation of xenoliths led to blending of incompatible element– enriched melts derived mainly from hornblende, phlogopite, and plagioclase in combination with variable retention of xenocrysts, hence variable but high compatible element concentrations. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.