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Lake tectonics in Tibet : uplift of lake shorelines and estimates of lower crustal viscosity

Research Project

Project/Area Number 20403014
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section海外学術
Research Field Geology
Research InstitutionNagoya University

Principal Investigator

WALLIS Simon  Nagoya University, 環境学研究科, 准教授 (30263065)

Co-Investigator(Kenkyū-buntansha) 鷺谷 威  名古屋大学, 環境学研究科, 准教授 (50362299)
中村 俊夫  名古屋大学, 年代測定総合研究センター, 教授 (10135387)
Project Period (FY) 2008 – 2010
Project Status Completed (Fiscal Year 2010)
Budget Amount *help
¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
Fiscal Year 2010: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2009: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2008: ¥8,840,000 (Direct Cost: ¥6,800,000、Indirect Cost: ¥2,040,000)
Keywordsチベット / テクトニクス / 地殻の粘性 / 湖段丘 / 湖岸段丘 / 納木湖 / 隆起 / 下部地殻粘性 / チベット高原 / 湖 / 地殻粘性
Research Abstract

Models that try to account for the overall morphology and the growth of the Tibetan Plateau commonly assume the presence of a low viscosity layer in the mid crust. To test this model, GPS measurements were made around Lake Nam Co to determine the heights of lake shorelines. In combination with the results of 14C dating, we show that the water level in L. Nam Co has fallen 20 m in the past 10,000 years. If the proposed low viscosity layer does in deed exist, there should be a corresponding uplift of the shorelines as the water level decreases. However, such uplift was not recognized implying that the distribution and presence of any low viscosity layer beneath Tibet needs to be reexamined.

Report

(4 results)
  • 2010 Annual Research Report   Final Research Report ( PDF )
  • 2009 Annual Research Report
  • 2008 Annual Research Report
  • Research Products

    (17 results)

All 2011 2010 2009 2008 2007 Other

All Journal Article (8 results) (of which Peer Reviewed: 6 results) Presentation (7 results) Book (1 results) Remarks (1 results)

  • [Journal Article] 14C dating of Tufa deposits around lake Nam Co, Tibet.2011

    • Author(s)
      Wallis, S.R., Nakamura, T., Mori, H., Ozawa, K., Mitsuishi, M., Shirakawa, C.Hayashi, S.
    • Journal Title

      Summaries of Researches at Nagoya University Using AMS v.XXII

      Pages: 174-179

    • Related Report
      2010 Final Research Report
  • [Journal Article] ^<14>C Dating of Tufa Deposits Around Lake Nam Co, Tibet.2011.2011

    • Author(s)
      Wallis, S., Nakamura, T., Mori, H., Ozawa, K., Mitsuishi, M., Shirakawa, C., Hayashi, S
    • Journal Title

      Summaries of Researches at Nagoya University Using AMS

      Volume: 22 Pages: 174-179

    • Related Report
      2010 Annual Research Report
  • [Journal Article] Middle to late Miocene extremely rapid exhumation and thermal equilibration in the Kung Co rift, southern Tibet2011

    • Author(s)
      Lee, J., Hager, C., Wallis, S.R., Stockli, D.F., Whitehouse, M.J., Aoya, M., Wang, Y.
    • Journal Title

      Tectonics

      Volume: 30

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Lake shoreline deformation in Tibet and mid-crustal flow.2010

    • Author(s)
      Wallis, S.R., Mori,H., Ozawa,K., Mitsuishi, M.Shirakawa.C.
    • Journal Title

      Island Arc 19

      Pages: 313-335

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Regional-scale excess Ar wave in Barrovian type metamorphic belt, eastern Tibetan Plateau2009

    • Author(s)
      Itaya, T., Hyodo, H., Tsujimori, T., Wallis, S., Aoya, M., Kawakami, T, Gouzu, C.
    • Journal Title

      Island Arc 18

      Pages: 293-305

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 40Ar/39Ar Constraints on the tectonic history and architecture of the ultrahigh-pressure Sulu orogen2009

    • Author(s)
      Hacker, B.R., Wallis, S.R., McWilliams, O., Gans, P.B.
    • Journal Title

      Journal of Metamorphic Geology 27

      Pages: 827-844

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Regional-Scale Excess Ar wave in a Barrovian type metamorphic belt, western Tibetan Plateau2008

    • Author(s)
      Itaya, T.
    • Journal Title

      Island Arc DOI:10.1111/j.1440-1738.2008.00621.x

      Pages: 1-13

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Middle to late Miocene extremely rapid exhumation and thermal equilibrium in the Kung Co Rift, southern Tibet.2007

    • Author(s)
      Lee, J., Hager, C., Wallis, S.R., Stockli, D.F., Whitehouse, M.J., Aoya, M.Wang
    • Journal Title

      Tectonics 30, TC doi:10

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Presentation] Cenozoic Emplacement Age of the Kangmar Granite in South Tibet2011

    • Author(s)
      C.Shirakawa, S.Wallis, K.Kitajima, Y.Sano
    • Organizer
      HKT 25 (Himalaya-Karakorum-Tibet meeting)
    • Place of Presentation
      San Francisco State University, SF
    • Year and Date
      2011-06-10
    • Related Report
      2010 Annual Research Report
  • [Presentation] 19 Ma Ductile E-W Extension associated with Normal Faulting in the Kung Co area, Southern Tibet2011

    • Author(s)
      M.Mitsuishi, S.Wallis, M.Aoya, J.Lee, M.Whitehouse
    • Organizer
      HKT 25 (Himalaya-Karakorum-Tibet meeting)
    • Place of Presentation
      San Francisco State University, SF
    • Year and Date
      2011-06-09
    • Related Report
      2010 Annual Research Report
  • [Presentation] Deformation of Lake Shorelines and Mid Crustal Flow in Tibet.2011

    • Author(s)
      Wallis S.R., Ozawa,K., Mori,H., Sagiya, T.etc.
    • Organizer
      Japan Geophysical Union
    • Place of Presentation
      幕張市
    • Year and Date
      2011-05-27
    • Related Report
      2010 Final Research Report
  • [Presentation] チベットNam Co(ナムツォ)地域における湖段丘の年代測定2011

    • Author(s)
      Wallis, S.R., Nakamura, T., Mori, H., Ozawa, K., など
    • Organizer
      名古屋大学総合年代測定センターシンポジウム
    • Place of Presentation
      名古屋大学
    • Year and Date
      2011-01-14
    • Related Report
      2010 Final Research Report
  • [Presentation] 19 Ma ductile extension associated with normal faulting in the Kung Co area, southern Tibet.2010

    • Author(s)
      Mitsuishi, M., Wallis, S.R., Aoya, M., Lee, J., Whitehouse, M.
    • Organizer
      HKT (Himalaya Karakorum Tibet) 25
    • Place of Presentation
      San Francisco
    • Year and Date
      2010-06-09
    • Related Report
      2010 Final Research Report
  • [Presentation] Cenozoic emplacement age of the Kangmar granite in south Tibet.2010

    • Author(s)
      Shirakawa, C., Wallis, S.R., Kitajima, K., Sano, Y.
    • Organizer
      HKT (Himalaya Karakorum Tibet) 25
    • Place of Presentation
      San Francisco
    • Year and Date
      2010-06-09
    • Related Report
      2010 Final Research Report
  • [Presentation] チベット南部 Kung Co 地域における正断層運動に伴う延性変形2009

    • Author(s)
      三石真祐瞳, ウォリス・サイモン
    • Organizer
      日本地質学会第116年学術大会
    • Place of Presentation
      岡山理科大
    • Year and Date
      2009-09-01
    • Related Report
      2009 Annual Research Report
  • [Book] UIHPM-25 years after the discovery of coesite & diamond2011

    • Author(s)
      Eds.Dobrzhinetskaya, L., Faryad, Elsevier
    • Total Pages
      696
    • Publisher
      S.W., Wallis, S.R., Cuthbert, S.
    • Related Report
      2010 Annual Research Report
  • [Remarks] ホームページ等

    • Related Report
      2010 Final Research Report

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Published: 2008-04-01   Modified: 2021-04-07  

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