Role of subduction erosion in the generation of Andean magmas

Research Article| January 01, 1991 Role of subduction erosion in the generation of Andean magmas Charles R. Stern Charles R. Stern 1Department of Geological Sciences, University of Colorado, Boulder, Colorado 80309 Search for other works by this author on: GSW Google Scholar Author and Article Information Charles R. Stern 1Department of Geological Sciences, University of Colorado, Boulder, Colorado 80309 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 (1): 78–81. https://doi.org/10.1130/0091-7613(1991)019<0078:ROSEIT>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 Charles R. Stern; Role of subduction erosion in the generation of Andean magmas. Geology 1991;; 19 (1): 78–81. doi: https://doi.org/10.1130/0091-7613(1991)019<0078:ROSEIT>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 Subduction erosion, or scraping off of the continental crust by subducting oceanic lithosphere, is an important tectonic process along parts of the Andean convergent plate boundary. Estimated rates of subduction erosion increase northward north of the southem Andes, due to decreasing subduction angle and decreasing sediment supply to the trench. West of the central Andes subduction erosion may remove as much as 535 km3 of crust per 1 km of trench per 1 m.y., or 7 vol% of the subducting oceanic lithosphere. The higher 87Sr/86Sr ratios of mafic magmas erupted north of the southern Andes may be explained by the higher rates of subduction erosion and increased amounts of contamination of the sub-arc mantle magma source. 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.