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- W2034359395 abstract "Research Article| January 01, 2011 Fast slip with inhibited temperature rise due to mineral dehydration: Evidence from experiments on gypsum Nicolas Brantut; Nicolas Brantut 1Laboratoire de Géologie, CNRS UMR 8538, École Normale Supérieure, 75005 Paris, France Search for other works by this author on: GSW Google Scholar Raehee Han; Raehee Han 2Department of Earth and Planetary Systems Science, Hiroshima University, Higashi-Hiroshima 739–8526, Japan3Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources, Daejeon 305–350, South Korea Search for other works by this author on: GSW Google Scholar Toshihiko Shimamoto; Toshihiko Shimamoto 2Department of Earth and Planetary Systems Science, Hiroshima University, Higashi-Hiroshima 739–8526, Japan Search for other works by this author on: GSW Google Scholar Nathaniel Findling; Nathaniel Findling 1Laboratoire de Géologie, CNRS UMR 8538, École Normale Supérieure, 75005 Paris, France Search for other works by this author on: GSW Google Scholar Alexandre Schubnel Alexandre Schubnel 1Laboratoire de Géologie, CNRS UMR 8538, École Normale Supérieure, 75005 Paris, France Search for other works by this author on: GSW Google Scholar Geology (2011) 39 (1): 59–62. https://doi.org/10.1130/G31424.1 Article history received: 27 May 2010 rev-recd: 04 Aug 2010 accepted: 10 Aug 2010 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 Nicolas Brantut, Raehee Han, Toshihiko Shimamoto, Nathaniel Findling, Alexandre Schubnel; Fast slip with inhibited temperature rise due to mineral dehydration: Evidence from experiments on gypsum. Geology 2011;; 39 (1): 59–62. doi: https://doi.org/10.1130/G31424.1 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 Anomalously low heat flow around active faults has been a recurrent subject of debate over past decades. We present a series of high-velocity friction experiments on gypsum rock cylinders showing that the temperature of the simulated fault plane is efficiently buffered due to large-scale endothermic dehydration reaction. The tests were performed at 1 MPa normal stress and a velocity of 1.3 m s−1, while measuring the temperature close to the sliding surface and the relative humidity around the sample. The temperature close to the sliding surface is remarkably stable at ∼100 °C during the dehydration reaction of gypsum. Microstructural and X-ray diffraction investigations show that dehydration occurs at the very beginning of the test, and progresses into the bulk as slip increases. In the hottest parts of the sample, anhydrite crystal growth is observed. The half-thickness of the dehydrated layer ranges from 160 μm at 2 m slip to 5 mm at 68 m slip. Thermodynamic estimates of the energy needed for the dehydration to occur yield values ranging from 10% to 50% of the total mechanical work input. The temperature plateau is thus well explained by the energy sink due to the dehydration reaction and the phase change from liquid water into steam. We suggest that similar endothermic reactions can efficiently buffer the temperature of fault zones during an earthquake. This is a way to explain the low heat flow around active faults and the apparent scarcity of frictional melts in nature. You do not have access to this content, please speak to your institutional administrator if you feel you should have access." @default.
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- W2034359395 title "Fast slip with inhibited temperature rise due to mineral dehydration: Evidence from experiments on gypsum" @default.
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