Stretching of fluid inclusions in calcite as an indicator of frictional heating on faults

Abstract

Research Article| February 01, 2008 Stretching of fluid inclusions in calcite as an indicator of frictional heating on faults Kohtaro Ujiie; Kohtaro Ujiie 1Institute for Research on Earth Evolution, Japan Agency for Marine-Earth Science and Technology, 3173-25 Showa-machi, Kanazawa-ku, Yokohama 236-0001, Japan Search for other works by this author on: GSW Google Scholar Asuka Yamaguchi; Asuka Yamaguchi 2Department of Earth and Planetary Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan Search for other works by this author on: GSW Google Scholar Sachihiro Taguchi Sachihiro Taguchi 3Department of Earth System Science, Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka 814-0180, Japan Search for other works by this author on: GSW Google Scholar Author and Article Information Kohtaro Ujiie 1Institute for Research on Earth Evolution, Japan Agency for Marine-Earth Science and Technology, 3173-25 Showa-machi, Kanazawa-ku, Yokohama 236-0001, Japan Asuka Yamaguchi 2Department of Earth and Planetary Science, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan Sachihiro Taguchi 3Department of Earth System Science, Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka 814-0180, Japan Publisher: Geological Society of America Received: 23 Jul 2007 Revision Received: 27 Sep 2007 Accepted: 27 Sep 2007 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 The Geological Society of America, Inc. Geology (2008) 36 (2): 111–114. https://doi.org/10.1130/G24263A.1 Article history Received: 23 Jul 2007 Revision Received: 27 Sep 2007 Accepted: 27 Sep 2007 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 Kohtaro Ujiie, Asuka Yamaguchi, Sachihiro Taguchi; Stretching of fluid inclusions in calcite as an indicator of frictional heating on faults. Geology 2008;; 36 (2): 111–114. doi: https://doi.org/10.1130/G24263A.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 Fluid inclusions trapped in calcite tend to increase in volume (i.e., stretching) when heated to temperatures higher than those of the initial entrapment at the entrapment pressure, and the result is an increase in the homogenization temperature. We examined whether the stretching of fluid inclusions in calcite occurred by frictional heating on the subduction thrust exhumed from seismogenic depths (4–6 km) at which the slip is localized along the few-centimeters-thick ultracataclasite layer. The results indicate that the histograms of the homogenization temperatures of the fluid inclusions in the ultracata-clasite are marked by the pronounced skewness, with the frequency mode near the low-temperature end of the range and a tapering tail toward higher temperatures. These skewed frequency distributions are absent in the surrounding rocks and are best explained by the stretching of the fluid inclusions by the frictional heating associated with the localized slip. Experimental stretching of fluid inclusions in calcite demonstrated that the tapering tail toward high temperatures in the histograms of the homogenization temperatures from the ultra-cataclasite can be reproduced by a 50–150 °C temperature rise along the ultracataclasite with respect to the ambient temperature. Stretching of fluid inclusions in calcite could record a small temperature rise during frictional heating on faults and is potentially useful in identifying the restraint of the temperature rise by fluid pressurization during an earthquake. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.