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Precipitation of Lime Mud in Coral Reef Environments of the Ryukyu Arc

Research Project

Project/Area Number 08454144
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Geology
Research InstitutionUniversity of the Ryukyus

Principal Investigator

YAMAMOTO Satoshi  University of the Ryukyus, College of Science, Professor, 理学部・物質地球科学科, 教授 (50124855)

Project Period (FY) 1996 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥5,200,000 (Direct Cost: ¥5,200,000)
Fiscal Year 1998: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1997: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1996: ¥3,600,000 (Direct Cost: ¥3,600,000)
KeywordsLime mud / Lime clay / HMC / aragonite / Micrite / ミクライト / サンゴ礁粘土 / Lime clay / 高マグネシウム方解石 / 穿孔 / サンゴ礁泥 / 高ストロンチウムアラレ石 / 続成作用 / 細粒化 / 石垣島 / 沖縄本島 / サンゴ礁 / Lime mud / 係留観測
Research Abstract

The objective of this research is to clarify the origin of lime mud in coral reef environments, because the lime mud may be lithified as micrite in ancient limestone.
The lime mud contains such carbonate minerals as HMC(high-Mg calcite) and aragonite ; however, the Mg/Ca and Sr/Ca ratios in these minerals contained in lime mud are lower than those ratios in coarse carbonates. This may signify that Mg and Sr from these carbonate minerals may be leached out during fining processes in the environments.
Lime clay was first discovered during this research. Lime clay is contained as pathes in coral skeletons or coral reef limestones. Mineralogically, lime clay is enriched with HMC.In conclusion, this lime clay patch may be formed as micrite envelope in the limestone. In other words, organisms may bore the limestones and coral skeletonsand HMC and other carbonates may be precipitated in this bored space in the coral reef limestone.

Report

(4 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • 1996 Annual Research Report
  • Research Products

    (25 results)

All Other

All Publications (25 results)

  • [Publications] S.Yamamoto: "Crystal alteration to form aragonite needles in living Halimeda." Bull.Coll.Sci.,Univ.Ryukyus. No.62. 33-43 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] S.Yamamoto: "Scanning electron microscopic observation of lime mud recovered from a coral reef lagoonal basin,Manza Beach,the Okinawa Island,Japan." Jour.Sed.Soc.Japan. No.44. 3-13 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] S.Yamamoto and Y.Zhu: "Thenardite and gypsum precipitated in wall of brick building in campus ot University of the Ryukyus,Okinawa." Jour.Sed.Soc.Japan. No.46. 15-21 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 山本 聰: "ミクライトの成因:サンゴ礁泥とココリス軟泥は何が違うのか" 月刊地球. V.20,no.4. 224-229 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] S.Yamamoto and N.Ishihara: "Elemental composition of lime mud recovered from coral reef lagoon〓 basins,the Yaeyama Islands,Okinawa Japan" Jour.Sed.Soc.Japan. No.48. 45-54 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] S.Yamamoto and Y.Yokoyama: "Monitoring on sedimentation behavior of terrigenous red soils th〓 mooring and weather station in coral-reef coastal area,the Okinawa Island,Japan" Proceeding,10C/WESTPAC. (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 堆積学 研究会(編): "堆積学辞典" 朝倉書店, 470p. (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yamamoto, S.: "Crystal alteration to form aragonite needles in living Halimeda" Bull.Coll.Sci., Univ.Ryukyus. No.62. 33-43 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yamamoto, S.: "Scanning electron microscopic observation of lime mud recovered from a coral reef lagoonal basin, Manza Beach, the Okinawa Island, Japan" Jour.sed.Soc.Japan. No.44. 3-13 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yamamoto, S., and Zhu, Y.: "Thenardite and gypsum precipitated in wall of brick building in campus of University of the Ryukyus, Okinawa" Jour.Sed.Soc.Japan. No.46. 15-21 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yamamoto, S., and Ishihara, N.: "Elemental composition of lime mud recovered from coral reef lagoonal basins, the Yaeyama Island, Okinawa, Japan" Jour.Sed.Soc.Japan. No.48. 45-54 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Yamamoto, S., and Yokoyama, Y.: "Monitoring on sedimentation behavior of terrigenous red soils through mooring and weather station in coral-reef coastal area, the Okinawa Island, Japan" Proceedings, 10C/WESTPAC.(1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 山本 聰: "ミクライトの成因:サンゴ礁泥とココリス軟泥は何が違うのか" 月刊地球. V.20 no.4. 224-229 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Yamamoto,S.,and Ishihara,N.: "Elemental Composition of lime mud recovered from coral reef lagoonal basins,the Yaeyama Islands,Okinawa,Japan" Journal of Sedimentological Society of Japan. No.48. 45-54 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Yamamoto,S.,and Yokoyama,Y.: "Monitoring on sedimentation behavior of terrigenous red soils through mooring and weather station in coral-reef coastal area,the Okinawa Island,Japan" Proceedings,IOC/WEST PAC. (発表予定). (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 堆積学研究会: "堆積学辞典" 朝倉書店, 470 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Yamamoto,S.: "Scanning electron microscopic observation of lime mud recovered from a coral reef lagoonal basin,Manza Beach,the Okinawa Island,Jap." Jour.Sed.Soc.Japan. 44. 3-13 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Yamamoto,S.,and Zhu,Y: "Thenardite and gypsum precipitated in wall of brink building in campus of University of the Ryukyus,Okinawa" Jour.Sed.Soc.Japan. 46. 15-21 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 山本 聰: "シクライトの成因:サンゴ礁泥とココリス軟泥は何が違うのか" 月刊地球. v.20,no.4. (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] Yamamoto,S., and Yokoyama,Y.: "Monitoring on sedimentation behavior of terrigenous red soils through mooring and weather stations in coral-reef coastal area,the Okinawa Island" Proceedings,UNESCO/IOC/WESTIAC. (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 山本 聰(分担): "堆積学辞典" 朝倉書店, (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] Yamamoto,S.: "Cyclic deposition of pelagic micritic limestone and flint nodules on a Mesozoic seamount,Hokkaido,Japan" The Compass. v.71,no.4. 147-158 (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] Yamamoto,S.: "Crystal alteration to form aragonite needles in living Halimeda" Bull.Coll.Sci.,Univ.Ryukyus. No.62. 33-44 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Yamamoto,S.: "Scanning electron microscopic observation of lime mud recovered from a coral reef lagoonal basin,Manza Beach,the Okinawa Island Japan" Jour.Sed.Soc.Japan. No.44. 3-13 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] Yamamoto,S.: "Periodic sedimentation of suspended sediment in water column of the ocean near coral reefs,the Okinawa Island,Japan" in J.Harff et al.,eds.,Computerized Modeling of Sedimentary Systems : Springer-Verlag. (in press).

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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