Research Article| November 01, 2015 Slab flattening, magmatism, and surface uplift in the Cordillera Occidental (northern Peru) Audrey Margirier; Audrey Margirier 1Université Grenoble Alpes, ISTerre, F-38041 Grenoble, France Search for other works by this author on: GSW Google Scholar Xavier Robert; Xavier Robert 1Université Grenoble Alpes, ISTerre, F-38041 Grenoble, France2Institut de Recherche pour le Développement (IRD), ISTerre, F-38041 Grenoble, France Search for other works by this author on: GSW Google Scholar Laurence Audin; Laurence Audin 1Université Grenoble Alpes, ISTerre, F-38041 Grenoble, France2Institut de Recherche pour le Développement (IRD), ISTerre, F-38041 Grenoble, France Search for other works by this author on: GSW Google Scholar Cécile Gautheron; Cécile Gautheron 3Université Paris Sud, UMR GEOPS-CNRS 8148, 91405 Orsay, France Search for other works by this author on: GSW Google Scholar Matthias Bernet; Matthias Bernet 1Université Grenoble Alpes, ISTerre, F-38041 Grenoble, France Search for other works by this author on: GSW Google Scholar Sarah Hall; Sarah Hall 4College of the Atlantic, 105 Eden Street, Bar Harbor, Maine 04609, USA Search for other works by this author on: GSW Google Scholar Thibaud Simon-Labric Thibaud Simon-Labric 5Institut des Dynamiques de la Surface Terrestre (IDYST), Université de Lausanne, CH-1015 Lausanne, Switzerland Search for other works by this author on: GSW Google Scholar Author and Article Information Audrey Margirier 1Université Grenoble Alpes, ISTerre, F-38041 Grenoble, France Xavier Robert 1Université Grenoble Alpes, ISTerre, F-38041 Grenoble, France2Institut de Recherche pour le Développement (IRD), ISTerre, F-38041 Grenoble, France Laurence Audin 1Université Grenoble Alpes, ISTerre, F-38041 Grenoble, France2Institut de Recherche pour le Développement (IRD), ISTerre, F-38041 Grenoble, France Cécile Gautheron 3Université Paris Sud, UMR GEOPS-CNRS 8148, 91405 Orsay, France Matthias Bernet 1Université Grenoble Alpes, ISTerre, F-38041 Grenoble, France Sarah Hall 4College of the Atlantic, 105 Eden Street, Bar Harbor, Maine 04609, USA Thibaud Simon-Labric 5Institut des Dynamiques de la Surface Terrestre (IDYST), Université de Lausanne, CH-1015 Lausanne, Switzerland Publisher: Geological Society of America Received: 12 Jun 2015 Revision Received: 14 Sep 2015 Accepted: 16 Sep 2015 First Online: 09 Mar 2017 Online Issn: 1943-2682 Print Issn: 0091-7613 © 2015 Geological Society of America Geology (2015) 43 (11): 1031–1034. https://doi.org/10.1130/G37061.1 Article history Received: 12 Jun 2015 Revision Received: 14 Sep 2015 Accepted: 16 Sep 2015 First Online: 09 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 Audrey Margirier, Xavier Robert, Laurence Audin, Cécile Gautheron, Matthias Bernet, Sarah Hall, Thibaud Simon-Labric; Slab flattening, magmatism, and surface uplift in the Cordillera Occidental (northern Peru). Geology 2015;; 43 (11): 1031–1034. doi: https://doi.org/10.1130/G37061.1 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 The impact of subduction processes on surface uplift and relief building in the Andes is not well understood. In northern Peru, we have access to a modern flat subduction zone (3°–15°S) where both the geometry and timing of the flattening of the slab are well constrained. Some of the highest Andean peaks, the Cordillera Blanca (6768 m) and the Cordillera Negra (5187 m), are located just above the Peruvian flat slab. This is a perfect target to explore the impact of slab flattening and associated magmatism on Andean topography and uplift. We present new apatite (U-Th)/He and fission-track data from three vertical profiles in the Cordillera Blanca and the Cordillera Negra. Time-temperature inverse modeling of the thermochronological data suggests that regional exhumation in the Cordillera Occidental started at ca. 15 Ma, synchronous with the onset of subduction of the Nazca Ridge and eastward movement of regional magmatism. We propose that ridge subduction at 15 Ma and onset of slab flattening drove regional surface uplift, with an important contribution of magmatism to relief building in the Cordillera Occidental. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.