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Causation of barrier reefs of the Sekisei Lagoon and fringing reefs of the southern Okinawa Island in the southern Ryukyu Islands on island shelf on the basis of drilling and shallow reflection investigation

Research Project

Project/Area Number 09308003
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field 自然地理学
Research InstitutionUniversity of the Ryukyus

Principal Investigator

KAWANA Toshio  University of the Ryukyus, College of Education, Professor, 教育学部, 教授 (60044955)

Co-Investigator(Kenkyū-buntansha) KAN Hironobu  Okayama University, Faculty of Education, Associate Professor, 教育学部, 助教授 (20294390)
Project Period (FY) 1997 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥32,200,000 (Direct Cost: ¥32,200,000)
Fiscal Year 1999: ¥2,400,000 (Direct Cost: ¥2,400,000)
Fiscal Year 1998: ¥4,800,000 (Direct Cost: ¥4,800,000)
Fiscal Year 1997: ¥25,000,000 (Direct Cost: ¥25,000,000)
KeywordsRyukyu Islands / Holocene / Coral reef / Sea-level change / The 1771 Meiwa Tsunami / Typhoon / Coralline boulder / 沖縄島 / 具志頭海岸 / サンゴ礁掘削 / 完新世サンゴ礁 / 完新世海面変動 / 島尻層群 / 琉球石灰岩 / 石西礁湖 / 先行カルスト / 浅層反射探査
Research Abstract

Holocene coral reef in Gushichan coast in the southern Okinawa Island commenced to grow upward on the flat surface about 15〜20 m deep about 7600 yrs BP. The first phase of coral reef in Gushichan formed about 6000 yrs BP due to uplifted area. The second one was developed offshore about 4000 yrs BP, then after about 2500 yrs BP the third one was formed offshore. Holocene coral reef in the Sekisei Lagoon started to grow upward on the flat surface about 20〜25 m deep. In the southern Ishigaki Island, the first phase of coral reef was formed about 7000〜6000 yrs BP due to uplift movement. About 5500〜5000 yrs BP, a fringing reef developed in Taketomi Island and patch reef was formed in the inner part of the Sekisei Lagoon. Then about 3600 yrs BP, barrier reef was formed in the outer part of the Sekisei Lagoon. Three phases of Holocene coral reef have been formed in these areas due to uplift movement and sea-level change.

Report

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

    (15 results)

All Other

All Publications (15 results)

  • [Publications] Kawana, T., kan, H. and Matsumoto, E.: "Holocene coral reefs at Gushichan coast in the southern Okinawa Island, the Ryukyus"Proceedings of Third international marine Science Symposium. 58-63 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kawana,T.and Pirazzoli,P.A: "Holocene corals and shells from Taketomi,Iriomote,Aguni,and Zamami,the Ryukyus,Japan"琉球大学教育学部紀要. 54集. 67-77 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kawana,T., Kan,H. and Matsumoto,E.: "Holocene coral reefs at Gushichan coast in the southern Okinawa Island, the Ryukyus"Proceedings of Third international Marine Science Symposium. 58-63 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kawana,T. and Pirazzoli,P.A.: "Holocene corals and shells from Taketomi, Iriomote, Aguni, and Zamami, the Ryukyus, Japan"Bulletin of College of Education, University of the Ryukyus. 67-77 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kawana,T.Kan,H.and Matsumoto,E.: "Holocene coral reefs at Gushichan coast in the southern Okinawa Island,the Ryulnyus."Proceedings of third Infermational Morine Science Symposium. 58-63 (1998)

    • Related Report
      1999 Annual Research Report
  • [Publications] Kawana,T.Kan,H.: "Hoocene corals and shells from Takefomi Isiowote Aguni,and Zawami the Pycihyu,Japan"琉球大学教育学部紀要. 54集. 67-77 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Kawana,T.Kan,H.: "Holocene bosrier reefs in the Sekisei Logoor the Ryvkyus"Coral Reefs. (発表予定).

    • Related Report
      1999 Annual Research Report
  • [Publications] 河名俊男、菅浩伸: "沖縄島における完新世海面変動とサンゴ礁の発達"地理学洋論. (発表予定).

    • Related Report
      1999 Annual Research Report
  • [Publications] Kawana,T.,Kan,H.and Matsumoto,E.: "Holocene coral reefs at Gushichan coast in the southern Okinawa Island,the Ryukyus,as deduced from driling cores" Proceedings of third International Marine Scince Symposium. 58-63 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Kawana,T.and Kan,H.: "Holocene barrier reefs in the Sekisei Lagoon,the Ryukyus" Coral Reefs. (発表予定).

    • Related Report
      1998 Annual Research Report
  • [Publications] Kan,H.and Kawana,T.: "Barrier reefs in the high latitude" Quaternary Research. (発表予定).

    • Related Report
      1998 Annual Research Report
  • [Publications] 河名俊男,菅浩伸: "琉球列島南部石西礁湖における堡礁の成因" 地理学洋論. (発表予定).

    • Related Report
      1998 Annual Research Report
  • [Publications] Kawana,T.and Kan,H.: "Holocene barrier reefs in the the Sekisei Lagoon,the Ryukyus" Coral Reefs. 発表予定.

    • Related Report
      1997 Annual Research Report
  • [Publications] Kan,H.and Kawana,T.: "Barrier reefs in the high latitude" Quaternary Research. 発表予定.

    • Related Report
      1997 Annual Research Report
  • [Publications] 河名俊男・菅浩伸: "琉球列島南部石西礁湖における堡礁の成因" 地理方詳論. 発表予定.

    • Related Report
      1997 Annual Research Report

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

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