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2001 Fiscal Year Final Research Report Summary

Geoenvironmental assessment wsing geocemical map

Research Project

Project/Area Number 12490016
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 広領域
Research InstitutionNagoya University

Principal Investigator

TANAKA Tsuyoshi  Nagoya Univ. Environmentaal Studies, Professor, 大学院・環境学研究科, 教授 (00236605)

Co-Investigator(Kenkyū-buntansha) HIRAHARA Yasuhiro  Nagoya Univ. Environmentaal Studies, Assoc. Prof., 大学院・環境学研究科, 助教授 (30252224)
YAMAMOTO Koshi  Nagoya Univ. Environmentaal Studies, Assoc. Prof., 大学院・環境学研究科, 助教授 (70183689)
ADACHI Tsuyoshi  Nagoya Univ. University Museum, Professor, 博物館, 教授 (10113094)
ASAHARA Yoshihiro  Nagoya Univ. Environ. Studies, Assistant Prof., 大学院・環境学研究科, 助手 (10281065)
MINAMI Masayo  Nagoya Univ. Environmentaal Studies, Assistant. Prof., 大学院・環境学研究科, 助手 (90324392)
Project Period (FY) 2000 – 2001
Keywordsgeochemical map / geoenvironment / enviromental dynamics / geochemical cycle / neutron activation analysis / x-ray fluorescence analy / Gifu Prefecture / Aichi Prefecture
Research Abstract

Stream sediments from the northern parts of Aichi Prefecture through the southern parts of Gifu Prefecture were examined for geoenvironmental assessment of the area. New 1100 samples were analyzed for seventeen elements includingAl, Ca, Ce, Co, Cr, Cu, Fe, K, Mn, Mg, Na, Ni, P. Sr, Ti, V and Zn. ICP-AES andAAwere employed for analyzes. The representativeness of the analyzed data for the sampling locality is examined by means of duplicate or triplicate samplings from the same place and by repeated analyzes. The data show ±50% variations in the abundance of Ti and ±30% or less variations for other elements. This variation may have been caused by heterogeneous distribution of small accessory minerals bearing Ti. The elemental abundances vary more than ten times in the examined area. Then the geochemical map obtained here is . Significant to indicate the areal variations of elements. The stream sediments from the area where granitic rockare exposed are rich inAl, Ca, Na, K, and Sr. On the contrary, Co, Cr, Fe, Ni, V, Mn and Zn are enriched in the sediments from the area where the Tertiary sediments are dominant Correlation coefficients higher than 0.6 are found between abundances of Ca-Na-Sr-Al, P-Cu-Zn and Ti-Ce. The coefficients are remarkably higher for the samples from the area of the Tertiary sediments than for the samples from granitic region. Although one sample shows a high Cr-abundance (785ppm), which is 20 times the abundance of the average value for the Tertiary sediments, no clear evidence for artificial pollution of any elements examined here is found. Twenty additional elements including As and Sb are analyzed by INAA and XRF. The results will be published in a shorttime.

  • Research Products

    (8 results)

All Other

All Publications (8 results)

  • [Publications] 冨樫 茂子: "日本列島の"クラーク数"若い島弧の上部地殻の元素存在度"地質ニュース. 558. 25-32 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 田中 剛: "地学野外実習としての地球化学図作成"地質ニュース. 558. 41-47 (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 柴田 信之介: "地圏環境における分素分布・循環の研究-原子炉中性子照射、郵送、γ線計測による多試料・多元素分析システムの確立"平成12年度原研施設利用共同研究成果報告書. 40. (2001)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 柴田 信之介: "名古屋大学アイソトープ総合センターに設置されたγ線自動測定・解析システムによる地質試料の中性子放射化分析手順と分析精度"名古屋大学博物館報告. 17. (2002)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Togashi. S: "The clarke Number of Japanese Islands : oung upper chemical composition"Chishitsu News. no.558. 25-33 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Tanaka. T: "Geochemical mapping : Afuniteful field training in geology"Chishitsu News. 558. 41-47 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Shibata. S: "The development of neutron activation, sample transportaion and γ-ray counting routine system for numbers of geological samples"Ann Rep. Of the Inter-University program for the Cpmmon Use of JAERI Facilities. No.40(in press).

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Shibata. S: "The procedur and accurcy of INAA for geological materials by new γ-ray counting and data processing system at Radioisotope Center in Nagoya Unibersity"Ann Rep.Unibersity-Museum Nagoya University. No.17(in press).

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2003-09-17  

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