Evidence of frictional melting from disk‐shaped black material, discovered within the Taiwan Chelungpu fault system

DOI Web Site Web Site 被引用文献12件 オープンアクセス
  • Tetsuro Hirono
    Kochi Institute for Core Sample Research Japan Agency for Marine‐Earth Science and Technology Nankoku Japan
  • Minoru Ikehara
    Center for Advanced Marine Core Research Kochi University Kochi Japan
  • Kenshiro Otsuki
    Department of Geoenvironmental Science, Graduate School of Science Tohoku University Sendai Japan
  • Toshiaki Mishima
    Center for Advanced Marine Core Research Kochi University Kochi Japan
  • Masumi Sakaguchi
    Marine Works Japan Nankoku Japan
  • Wonn Soh
    Kochi Institute for Core Sample Research Japan Agency for Marine‐Earth Science and Technology Nankoku Japan
  • Masahiro Omori
    Department of Geoenvironmental Science, Graduate School of Science Tohoku University Sendai Japan
  • Weiren Lin
    Kochi Institute for Core Sample Research Japan Agency for Marine‐Earth Science and Technology Nankoku Japan
  • En‐Chao Yeh
    Department of Geosciences National Taiwan University Taipei Taiwan
  • Wataru Tanikawa
    Kochi Institute for Core Sample Research Japan Agency for Marine‐Earth Science and Technology Nankoku Japan
  • Chien‐Ying Wang
    Institute of Geophysics National Central University Chung‐li Taiwan

書誌事項

公開日
2006-10
資源種別
journal article
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1029/2006gl027329
公開者
American Geophysical Union (AGU)

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説明

<jats:p>The Taiwan Chelungpu‐fault Drilling Project penetrated three fault zones as the Chelungpu fault system, which slipped during the 1999 Chi‐Chi earthquake, discovering disk‐shaped black material (BM disk) within the middle and lower fault zones in Hole B. The microscopic features of the BM disks indicated that they were pseudotachylytes, and they showed high magnetic susceptibility, possibly the result of intense shearing or high temperature conditions. Inorganic carbon content of the BM disks was low, possibly because of thermal decomposition of carbonate minerals. The high temperatures might be related to frictional heating during the earthquake, implying that the BM disks were produced under intense shearing with frictional heating that reached melting temperature. Because the disks, which provide the only evidence of melting, pre‐date the 1999 earthquake, we concluded that frictional melting did not occur during the earthquake.</jats:p>

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