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Study on the thermal anomaly due to active faulting

Research Project

Project/Area Number 09640507
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 固体地球物理学
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

TAGAMI Takahiro  Graduate School of Science, KYOTO UNIVERSITY Associate Prof., 大学院・理学研究科, 助教授 (80202159)

Co-Investigator(Kenkyū-buntansha) HASEBE Noriko  Kanazawa Univ., Department of Geology, Assistant Prof., 理学部, 助手 (60272944)
Project Period (FY) 1997 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1999: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1998: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1997: ¥1,400,000 (Direct Cost: ¥1,400,000)
KeywordsEarthguake / Nojima Fault / Thermal anomaly / Thermochronology / Fission track / Zircon / ファッショントラック / ジルロン
Research Abstract

To better understand the heat generation and transfer along earthquake fault, we measured zircon fission-track (FT) length data from Nojima fault, Awaji-shima Island, Japan, which was activated during the 1995 Kobe earthquake (Hyogo-ken Nanbu earthquake). Samples were collected from Cretaceous granitic rocks at depths using the Ogura 500 m borehole and Geological Survey of Japan (GSJ) borehole, as well as at outcrops nearby the boring sites. The Nojima fault plane was drilled at 389.4 m depth (along-core apparent depth) for Ogura and at about 625 m for GSJ. For Ogura samples, FT lengths in zircons from localities>60 m away from the fault plane as well as those from outcrops are characterized by the mean values of 〜10-11 μm and unimodal distributions with positive skewness, showing no signs of appreciable reduction of FT length. In contrast, those from nearby the fault at depths show significantly reduced mean of 〜7-8 μm and distributions having a peak around 6-7 μm with rather negative skewness. A similar trend was observed for GSJ samples, in which the peak around 6-7 μm is less dominant however. In conjunction with other geological constraints, these results are best interpreted by the recent thermal anomaly around the fault, which is attributable to the frictional heating of fault motion and/or heat transfer via fluids from the deep interior of the crust.

Report

(4 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • 1997 Annual Research Report
  • Research Products

    (23 results)

All Other

All Publications (23 results)

  • [Publications] T.Tagami: "Cordilleran-type. orogeng and episodic growth of eontinents : insights from circam-Paeific continental margins"The Island Arc. 8. 206-217 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] T.Tagami: "Thermal anomaly around Nojima fault as detected by the fission-track analysisi ot Ogura 500m borehole samples"The Island Arc. (in press). (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M.Sudo: "K-Ar dating of the vlocanic rocks from the Macolod Corridoe in south westen Lazon , Philippines"Philippine J. Earth Sci.. (in press). (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] T.Tagami: "Thermal hisitoru analysis of the Nojima fault borehole samples by fission -track thermochrorology"USGS Open File Rep.. (in press). (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Tagami, T. and Hasebe, N: "Cordilleran-type orogeny and episodic growth of continents : insights from circum-Pacific continental margins."The Island Arc. 8. 206-217 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 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 samples."The Island Arc. (in press). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Sudo, M., Listanco, L. L., Ishikawa, N., Tagami, T., Kamata, H. and Tatsumi,Y: "K-Ar dating of the volcanic rocks from Macolod Corridor in southwestern Luzon, Philippines : toward understanding of the Quaternary volcanism and tectonics."Philippine J. Earth Sci. (in press). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Tagami, T., Murakami, M., Hasebe, N., Kamohara, H. and Takemura, K.: "Thermal history analysis of the Nojima fault borehole samples by fission-track thermochronology."USGS Open File Rep. (in press). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] T.Tagami: "Cordillerar-type orogeny and cpisodic growth of continents : insights from circum-Pacific continental margins"The Island Arc. 8. 206-217 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] T.Tagami: "Thermal anomaly around Nojima fault as detected by the fission-trackanalysis of Ogura 500m borehole samples"The Island Arc. (in press). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] M.Sudo: "K-Ar dating of the volcanic rocks from the Macolod Corridoria southwestern Luzon, Philippinas"Philippine J.Earth Sci.. (in press). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] T.Tagami: "Thermal history analysis of the Nojima fault borehole samples by fission track thermochronology"USGS Open File Rep.. (in press). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] T.Tagami: "Revised anuemling kinetics of fission traoks in zircon and geological inplidations" In:Advances in fission-track geochronology. 99-112 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] R.Yamada: "Comparison of experimental techniques to increase the number of weasarable confined fission tracks in zircon" Chem.Geol.149. 99-107 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] T.Tagami: "Condilleran-type orageny and episodic growth of continantes insights from cirealn-Pacific continental margins" The Island Arc. in press. (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 森 聡: "ジルコン中のFTPアニーリング-基礎試錐「西頚城」からの結果-" フィッション・トラック ニュースレター. 11. 23-25 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 福谷亜矢子: "東伊豆単成火山岩類のK-Ar年代測定" フィッション・トラック ニュースレター. 11. 31-34 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 田上高広: "500mコアのフィッショントラック熱年代学から見い出された野島断層近傍の温度異常" 月刊地球. 21. 175-179 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] N.Hasebe: "Melange forming processes in the development of an accretionary prism : evidence from fission-track thermochronology" J.Geophys.Res.102. 7659-7672 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] T.Tagami: "Revised annealing kinetics of fission tracks in zircon and geological implications" In : Advances in Fission-Track Geochronology (ed.P.Vandenhaute and F.De Corte). (in press). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 田上高広: "付加体の年代学からみたコルディレラ型造山運動と白亜紀全地球変動" 月刊地球. 19. 178-182 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 田上高広: "500mコアのフィッショントラック熱年代学から見い出された野島断層近傍の温度異常" 月刊地球. 21(印刷中). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 田上高広: "フィッショントラック年代測定法" 理工学における同位元素研究発表要旨集パネル討論. 34. 218-221 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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