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Heat Flow and Electromagnetic Studies in the Continental Shelf Area off Eastern China

Research Project

Project/Area Number 01044034
Research Category

Grant-in-Aid for international Scientific Research

Allocation TypeSingle-year Grants
SectionJoint Research
Research InstitutionTokai University (1990-1991)
The University of Tokyo (1989)

Principal Investigator

UYEDA Seiya  School of Marine Science and Technology, Tokai University, 海洋学部, 教授 (60011459)

Co-Investigator(Kenkyū-buntansha) 喩 普之  中国科学院, 海洋研究所, 研究員
李 乃〓  中国科学院, 海洋研究所, 助理研究員
秦 蘊珊  中国科学院, 海洋研究所, 所長
NAGAO Toshiyasu  Faculty of Science, Kanazawa University, 理学部, 助手 (20183890)
HANDA Shun  College of Liberal Arts, Saga University, 教養部, 助教授 (70156529)
KIMURA Masaaki  Department of Marine Sciences, University of the Ryukyus, 理学部, 助教授 (20112443)
HAMANO Yozo  Dept. of Earth and Planetary Physics, University of Tokyo, 理学部, 教授 (90011709)
YAMANO Makoto  Earthquake Research Institute, University of Tokyo, 地震研究所, 助手 (60191368)
SASAI Yoichi  Earthquake Research Institute, University of Tokyo, 地震研究所, 助手 (20012924)
UTADA Hisashi  Earthquake Research Institute, University of Tokyo, 地震研究所, 助教授 (70134632)
KINOSHITA Hajimu  Earthquake Research Institute, University of Tokyo, 地震研究所, 教授 (10110347)
KINOSHITA Masataka  School of Marine Science and Technology, Tokai University, 海洋学部, 助手 (50225009)
QIN Yinshan  Institute of Oceanology, Academia Sinica
LI Naisheng  Institute of Oceanology, Academia Sinica
YU Puzhi  Institute of Oceanology, Academia Sinica
秦 〓珊  中国科学院, 海洋研究所, 所長
李 乃腥  中国科学院, 海洋研究所, 助理研究員
〓 雨亭  中国科学院, 海洋研究所, 助理研究員
松林 修  工業技術院, 地質調査所, 主任研究官
安井 正  鶴見大学, 歯学部, 教授 (10200495)
Project Period (FY) 1989 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥9,000,000 (Direct Cost: ¥9,000,000)
Fiscal Year 1991: ¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1990: ¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1989: ¥3,000,000 (Direct Cost: ¥3,000,000)
KeywordsEast China Sea / Okinawa Trough / South China Sea / Heat Flow / Bottom Water Temperature Variation / Long-term Temperature Monitoring / Ocean Bottom Electromagnetometer / Electrical Conductivity / 海底水温
Research Abstract

1. We carried out a Japan-China cooperative research program to investigate the thermal structure of the continental shelf area off eastern China. Three research cruises were conducted in the East China Sea in 1990 and 1991.
2. The effect of bottom water temperature variation must be removed to determine heat flow in shallow sea areas, such as the East China Sea.
(1) We tried to measure sediment temperature profiles repeatedly at the same stations using long probes, but could not make measurements on one cruise due to an accident. The data from the other two cruises were analyzed assuming annual bottom water temperature variation. Heat flow was estimated to be around 90 mW/m^2 in the northernmost Okinawa Trough and lower than 50 mW/m^2 off Shanghai. More measurements are necessary for accurate determination.
(2)We deployed a long-term temperature monitoring system on the seafloor to record the bottom water temperature variation, but could not retrieve it due to some fault in the pop-up mechanism.
3. We deployed ocean bottom electromagnetometers off Kyushu to determine the electrical conductivity structure. The instruments did not work properly, but we could obtain some magnetic field data, which indicate that some part of the northern Okinawa Trough has relatively low resistivity.
4. We also tried to determine heat flow using drill holes.
(l) In the East China Sea, we made temperature measurements in shallow holes in one hour after completion of drilling, but the records were too short to be extrapolated to the equilibrium.
(2) At the northern margin of the South China Sea, heat flow could be calculated in deep oil/gas wells from temperature logs and thermal conductivity of core samples.
5. We could identity problems in various methods for heat flow measurements in shallow sea areas, which can be solved in future cooperative studies.

Report

(3 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report
  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] 李 新元: "日中共同研究による東シナ海における地殻熱流量測定ー序報" 地震学会講演予稿集1990年度秋季大会. 190 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 山野 誠: "東シナ海における地殻熱流量の測定" 地球惑星科学関連学会1992年合同大会予稿集. (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] M.Yamano: "Heat flow studies of the East China Sea:Progress report of the JapanーChina cooperative research program(abstract)" Abstract Volume for the 29th International Geological Congress. (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 山野 誠: "東シナ海における地殻熱流量及び電磁気学調査ー日中共同研究航海の成果ー" 地震研究所彙報.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Li X.: "Japan-China cooperative heat flow studies in the East China Sea : Preliminary report (abstract)" Programme and Abstracts, Seismol. Soc. Japan, 1990, No. 2. 190 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] M. Yamano: "Heat flow measurements in the East China Sea (abstract)" Abstracts for the 1992 Japan Earth and Planetary Science Joint Meeting. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] M. Yamano: "Heat flow studies of the East China Sea : Progress report of the Japan-China cooperative research program (abstract)" Abstract Volume for the 29th International Geological Congress. (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] M. Yamano: "Heat flow and electromagnetic studies in the East China Sea : Results of a Japan-China cooperative research program (in preparation)" Bull. Earthq. Res. Inst.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 山野 誠: "東シナ海における地殻熱流量の測定(要旨)" 地球惑星科学関連学会1992年合同大会予稿集. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] M.Yamano: "Heat flow studies of the East China Sea:Progress report of the Japan-China cooperative research program (abstract)" Abstract Volume for the 29th International Geological Congress. (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] 山野 誠: "東シナ海における地殻熱流量及び電磁気学調査ー日中共同研究航海の成果ー" 地震研究所彙報.

    • Related Report
      1991 Annual Research Report

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Published: 1989-04-01   Modified: 2016-04-21  

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