Toasting the jelly sandwich: The effect of shear heating on lithospheric geotherms and strength

Research Article| April 01, 2008 Toasting the jelly sandwich: The effect of shear heating on lithospheric geotherms and strength Ebbe H. Hartz; Ebbe H. Hartz 1Physics of Geological Processes, University of Oslo, 0316 Oslo, Norway, and Aker Exploration, Haakon VII's gt. 9, P.O. Box 580, Sentrum, NO, 4003 Stavanger, Norway Search for other works by this author on: GSW Google Scholar Yuri Y. Podladchikov Yuri Y. Podladchikov 2Physics of Geological Processes, University of Oslo, 0316 Oslo, Norway Search for other works by this author on: GSW Google Scholar Author and Article Information Ebbe H. Hartz 1Physics of Geological Processes, University of Oslo, 0316 Oslo, Norway, and Aker Exploration, Haakon VII's gt. 9, P.O. Box 580, Sentrum, NO, 4003 Stavanger, Norway Yuri Y. Podladchikov 2Physics of Geological Processes, University of Oslo, 0316 Oslo, Norway Publisher: Geological Society of America Received: 03 Oct 2007 Revision Received: 07 Dec 2007 Accepted: 01 Jan 2008 First Online: 03 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2008 Geological Society of America Geology (2008) 36 (4): 331–334. https://doi.org/10.1130/G24424A.1 Article history Received: 03 Oct 2007 Revision Received: 07 Dec 2007 Accepted: 01 Jan 2008 First Online: 03 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Ebbe H. Hartz, Yuri Y. Podladchikov; Toasting the jelly sandwich: The effect of shear heating on lithospheric geotherms and strength. Geology 2008;; 36 (4): 331–334. doi: https://doi.org/10.1130/G24424A.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 We refine conventional continental-scale geodynamic models by including conversion of mechanical work done by deformation into heat. The intensity of the shear heating is extracted from the Brace-Goetze strength envelope without any additional model parameters or assumptions. Incorporation of this, certainly present, heating rate into a model may result in up to tenfold stress reduction, which is exceeding the effects of variation of common parameters within their uncertainty limits. Shear heating with lithospheric thickening at high integrated strength solves the puzzle of the heretofore-missing heat source recorded by metamorphism, magmatism, and heat flow in mountain building. However, the mechanism is self-limiting as the rising temperature reduces stress and thus the rate of heat production. Thus this is a self-regulating mechanism maintaining a moderate integrated lithospheric strength consistent with results of model-independent force-balanced calculations and with surface heat flow measurements. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.