Shear heating not a cause of inverted metamorphism

Abstract

Research Article| August 01, 2013 Shear heating not a cause of inverted metamorphism Steven B. Kidder; Steven B. Kidder 1California Institute of Technology, 1200 E. California Boulevard, Pasadena, California 91125, USA *Current address: Department of Geology, University of Otago, Dunedin 9054, New Zealand. Search for other works by this author on: GSW Google Scholar Frédéric Herman; Frédéric Herman 2Faculté des Géosciences et de l’Environnement, Université de Lausanne, Geopolis Bureau 3232, 1015 Lausanne, Switzerland3Earth Sciences Department, ETH, Sonneggstrasse 5, 8092 Zurich, Switzerland Search for other works by this author on: GSW Google Scholar Jason Saleeby; Jason Saleeby 1California Institute of Technology, 1200 E. California Boulevard, Pasadena, California 91125, USA Search for other works by this author on: GSW Google Scholar Jean-Philippe Avouac; Jean-Philippe Avouac 1California Institute of Technology, 1200 E. California Boulevard, Pasadena, California 91125, USA Search for other works by this author on: GSW Google Scholar Mihai N. Ducea; Mihai N. Ducea 4Department of Geosciences, University of Arizona, 1040 E. 4th Street, Tucson, Arizona 85721, USA5Universitatea Bucuresti, Facultatea de Geologie Geofizica, Str. N. Balcescu Nr 1, Bucharest 010041, Romania Search for other works by this author on: GSW Google Scholar Alan Chapman Alan Chapman 4Department of Geosciences, University of Arizona, 1040 E. 4th Street, Tucson, Arizona 85721, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Steven B. Kidder *Current address: Department of Geology, University of Otago, Dunedin 9054, New Zealand. 1California Institute of Technology, 1200 E. California Boulevard, Pasadena, California 91125, USA Frédéric Herman 2Faculté des Géosciences et de l’Environnement, Université de Lausanne, Geopolis Bureau 3232, 1015 Lausanne, Switzerland3Earth Sciences Department, ETH, Sonneggstrasse 5, 8092 Zurich, Switzerland Jason Saleeby 1California Institute of Technology, 1200 E. California Boulevard, Pasadena, California 91125, USA Jean-Philippe Avouac 1California Institute of Technology, 1200 E. California Boulevard, Pasadena, California 91125, USA Mihai N. Ducea 4Department of Geosciences, University of Arizona, 1040 E. 4th Street, Tucson, Arizona 85721, USA5Universitatea Bucuresti, Facultatea de Geologie Geofizica, Str. N. Balcescu Nr 1, Bucharest 010041, Romania Alan Chapman 4Department of Geosciences, University of Arizona, 1040 E. 4th Street, Tucson, Arizona 85721, USA Publisher: Geological Society of America Received: 06 Dec 2012 Revision Received: 02 Apr 2013 Accepted: 03 Apr 2013 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2013 Geological Society of America Geology (2013) 41 (8): 899–902. https://doi.org/10.1130/G34289.1 Article history Received: 06 Dec 2012 Revision Received: 02 Apr 2013 Accepted: 03 Apr 2013 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 Steven B. Kidder, Frédéric Herman, Jason Saleeby, Jean-Philippe Avouac, Mihai N. Ducea, Alan Chapman; Shear heating not a cause of inverted metamorphism. Geology 2013;; 41 (8): 899–902. doi: https://doi.org/10.1130/G34289.1 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 An archetypal example of inverted metamorphism purportedly resulting from shear heating is found in the Pelona Schist of southern California (United States). Recent studies demonstrate that the Pelona Schist was subducted and accreted at the onset of Laramide flat subduction under thermal and kinematic conditions not considered in earlier numerical models. To test the shear heating hypothesis under these conditions, we constructed a thermo-kinematic model of flat subduction initiation involving continuous accretion of the schist. A neighborhood algorithm inversion demonstrates that available metamorphic and thermochronologic constraints in the Sierra Pelona mountains are satisfied only if accretion rates were 0.2–3.6 km/m.y and shear heating was minimal (shear stress 0–19 MPa). Minimal shear heating is also consistent with an inversion of models constrained by thermochronology of the East Fork (of the San Gabriel River) exposure of the schist. Shear heating inhibits the formation of modeled inverted gradients during accretion and should not be considered an important factor in their generation. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.