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THERMAL PROCESSES OF SELSMOGENE ZONE REVEALED BY THERMOCHRONOLOGY

Research Project

Project/Area Number 12440137
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Geology
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

TAGAMI Takahiro  KYOTO UNIVERSITY, ASSOCIATE PROFESSOR, 大学院・理学研究科, 助教授 (80202159)

Co-Investigator(Kenkyū-buntansha) YAMADA Ryuji  GRADUATE SCHOOL OF SCIENCE, DIVISION OF SOLID EARTH RESEARCH, NATIONAL RESEARCH INSTITUTION FOR EARTH SCIENCE AND DISASTER PREVENTION, RESEARCH FELLOW, 固体地球研究部門, 研究員
長谷部 徳子  金沢大学, 理学部, 助手 (60272944)
Project Period (FY) 2000 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 2002: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2001: ¥900,000 (Direct Cost: ¥900,000)
KeywordsFISSION TRACK / THERMOCHRONOLOGY / EARTHQUAKE FAULT / PSEUDOTACHYLYTE / ZIRCON / NOSIMA FAULT / 領家帯 / 平林トレンチ / 四万十帯
Research Abstract

(1) FT's were significantly shortened nearby a fault both in the University 500m borehole at the Toshima site and Geological Survey of Japan borehole at the Hirabayashi site. This suggests that rocks along the fault were reheated into the zircon FT' partial annealing zone, sometime after the initial cooling of the Ryoke granitic rocks.
(2) Zircon FT dating revealed that the reheating event took place at about 2 Ma for the University 500m borehole and at about 40 Ma for the Geological Survey of Japan borehole. The widths of reheated zones are about 3 m for the former and about 20 m for the latter. In conjunction with the deformation/alteration data of borehole rock, it is likely that the reheating was caused by the transfer and/or dispersion of hot fluids.
(3) Laboratory hydrothermal heating experiment revealed that the annealing kinetics is indistinguishable between atmospheric and hydrothermal conditions.
(4) A similar widespread zircon FT annealing was found for hanging wall of the Mozumi fault system.
(5) In the upper boundary fault of the Okitsu melange of the Shimanto accretionary complex. FT's were significantly annealed for over 3 km distant away from the fault plane.

Report

(4 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • Research Products

    (22 results)

All Other

All Publications (22 results)

  • [Publications] N.HASEBA: "Fission track ages of the Omine Acidic Rocks, Kii Peninsula, Southwest Japan"Geochemical Journal. 34. 229-235 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] N.HASEBE: "Exhumation of an accretionary prism -results from fission track thermochronology of the Shimanto belt, southwest Japan"Tectonophysics. 331. 247-267 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T.TAGAMI: "Thermal anomaly around Nojima fault as detected by the fission-track analysis of Ogura 500M borehole samples"The Island Arc. 10. 457-464 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M.MURAKAMI: "Ancient thermal anomaly of an active fault system : Zircon fission-track evidence of Nojima GSJ 750m borehole samples"Geophysical Research Letters. 29. 015679 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T.TAGAMI: "(U-Th)/He geochronology of single zircon grains of known Tertiary eruption age"Earth Planetary Science Letters. 207. 57-67 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] N.HASEBE: "Geological partial annealing zone of zircon fission-track s stem : additional constraints from the deep dulling MITI-Nishikubiki and -Mishima"Chemical Geology. (in press). (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Hasebe, N., Suwargadi, B. W. and Nishimura, S.: "Fission track ages of the Dine Acidic Rocks, Kii Peninsula, Southwest Janan"Geochemical Journal. 34. 229-235 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Hasebe, N. and Tagami, T.: "Exhumation of an accretlonary prism - results from fission track thermochronology of the Shimanto belt, southwest Janan"Tectonophys.. 331. 247-267 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Tagami, T., Hasebe, N., Kamohara, H. and Takemura, K.: "Thermal anomaly around Nojima, fault as detected by the fission-track analysis of Ogura 500M borehole sarnples"The Island Arc. 10. 457-464 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Murakami, M., Tagami, T. and Hasebe, N.: "Ancient thermal anomaly of an active fault system: Zircon fission-track evidence of Nojima GSJ 750m borehole samples"Geophys. Res. Lett.. 29,doi:10.1029/20O2GL015679. (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Tagami, T., Farley, K. A. and Stockli, D. F.: "(U-Th)/He geochronology of single zircon grains of known Tertiary eruption age"Earth Planet. Sci. Lett.. 207/1-4. 57-67 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Hasebe, N., Mori, N., Tagami, T. and Matsui, R.: "Geoological partial annealing zone of zircon fission-track system: additional constraints from the dccp drilling MITI-Nishikubiki and -Mishima"Chem. Geol.. in press. (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M.MURAKAMI: "Ancient thermal anomaly of an active fault system : Zircon fission-track evidence of Nojima GSJ 750m borehole samples"Geophysical Research Letters. 29. 015679 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.TAGAMI: "(U-Th)/He geochronology of single zircon grains of known Tertiary eruption age"Earth and Planetary Science Letters. 207. 57-67 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] N.HASEBE: "Geological partial annealing zone of zircon fission-track system : additional constraints from the deep drilling MITI-Nishikubiki and -Mishima"Chemical Geology. (in press). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.TAGAMI: "Thermal anomaly around Nojima fault as detected by the fission-track analysis of Ogura 500M borehole samples"The Island Arc. 10. 457-464 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] N.HASEBE: "Exhumation of an accretionary prism-results from fission track thermochronology of the Shimanto belt,Southwest Japan"Tectonophysics. 331. 247-267 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 村上雅紀: "野島断層掘削コアおよび平林シュードタキライトから見い出された野島断層近傍の温度異常"FTニュースレター. 14. 44-48 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 山田国見: "ジルコンフィッショントラックの熱水アニーリング実験"FTニュースレター. 14. 49-52 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] T.TAGAMI: "Thermal anomaly around Nojima fault as detected by the fission-track analysis of Ogura 500M borehole samples."The Island Arc. (in press). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] N.HASEBE: "Exhumation of an accretionary prism-results from fission track thermochronology of the Shimanto belt, southwest Japan."Tectonophysics. (in press). (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] T.TAGAMI: "Thermal history analysis of the Nojima fault borehole samples by fission-track thermochronology."USGS Open-file Rep.. 00-129. 203-209 (2000)

    • Related Report
      2000 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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