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Ore textures and mineralization processes of seafloor deposits formed by hydrothermal circulation-Comparative study of the recent seafloor hydrothermal mineralization and Kuroko-type ore deposits-

Research Project

Project/Area Number 07640633
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Petrology/Mineralogy/Science of ore deposit
Research InstitutionAkita University

Principal Investigator

MIZUTA Toshio  Akita University, Mining College, Associate Professor, 鉱山学部, 助教授 (80094051)

Co-Investigator(Kenkyū-buntansha) ISHIYAMA Daizo  Akita University, Mining College, Lecturer, 鉱山学部, 講師 (30193361)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 1996: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1995: ¥2,100,000 (Direct Cost: ¥2,100,000)
Keywordssulfide minerals / diffusion in sulfides / pyrite / sphalerite / ore textures / Zn-Fe-S system / hydrothermal synthesis / Auger spectrometer / 黄銅鉱 / Zn‐Ag‐S系鉱物
Research Abstract

Ore-forming processes were examined from the experimental results of sulfide diffusion and distribution of trace elements between solution and sulfide minerals. Then, textures of ores from some seafloor hydrothermal deposits and Kuroko deposits are quantitatively analyzed from the viewpoint of crystal-size distribution theory.
1.Diffusion rates in sulfide minerals in Zn-Fe-S system and stability relationships are examined by annealing experiments using mainly Auger spectrometer. Obtained results of diffusion rates are relatively higher the activation energy is lower than previous interdiffusion studies by electron probe analyzes.
2.Distribution of trace elements such as cobalt and nickel between chloride solutions and pyrite were performed by hydrothermal synthesis method. Distribution coefficients were calculated from the data of Co^<2+>/Fe^<2+> ratios in solutions and pyrite from experiments at the temperatures of 200-300゚C.Distribution coefficients for recent seafloor hydrothermal ores and Kuroko-type ores with mineralized solutions are estimated from the data of the obtained distribution coefficients. Cobalt distribution in minerals are confirmed as an useful tool for the considerations of ore forming processes.
3.Using the apparatus purchased in this study, the size (axs, perimeters, directions of elongation, and so on) of chalcopyrite blebs are analyzed with the image processing methods. Such kinetic phenomena of 'chalcopyrite disease' were interpreted from the experimentally determined diffusion results. Diffusion time span and growth rates of chalcopyrite grains in sphalerite crystals are discussed in submitted paper to the International Journal.

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (23 results)

All Other

All Publications (23 results)

  • [Publications] Mizuta,T.,Ishiyama,D.Ohguchi,T.,Takada,J.: "Characteristic features of chemical composition of bentonite from the Tsukinuno bentonite deposit,Yamagata Prefecture." KURRI Prog.Rept.Sect.I. 5. 118-118 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 藤田豊久・藤光康宏・秋林智・水田敏夫: "乾燥した岩石における非抵抗の温度依存性に関する実験的研究." 日本地熱学会誌. 17. 111-121 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Lima,R.F.S.,Mizuta,T.Ishiyama,D.: "Tellurium-bearing minerals in Corego Criminoso gold mining district,Goias State,Brazil.," Rept.Research Inst.Natural Resources,Mining College,Akita Univ.No.61. 1-12 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 樋田忠孝・石山大三・水田敏夫: "広島県勝光山パイロフィライト鉱床の生成機構-火山層序と熱水変質作用-" 粘土科学. 36・2. 62-72 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 石山大三・水田敏夫・佐藤比奈子・二ツ川章二・世良耕一郎: "PIXE法による石英中の流体包有物の化学分析の研究" NMOC共同利用研究成果報文集. 3号. 139-143 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Maglambayan,V.B.,Ishikawa,Y.,Mizuta,T.and Ishiyama,D.: "Ore textures and fluid inclusion studies of the Uwamuki No.4 Kuroko orebody,Akita Prefecture,Japan." Jour.Min.Coll.Akita Univ.,Ser.A,. 8. 1-13 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 水田敏夫: "鉱物学 地球科学コース教科書" 秋田大学通信教育講座., 104 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Mizuta, T., Ishiyama, D., and Ohguchi, T.: "Characteristic features of chemical composition of bentonite from the Tsukinuno bentonite deposit, Yamagata Prefecture." Kyoto Univ.Research Reactor Inst. (KURRI) Prog.Rep.1994. 118 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Fujita, T., Fujimoto, Y., Akibayashi, S., Kosukegawa, H.Yamamoto, Y., and Mizuta, T.: "Experimental studies on temperature dependence of resistivity of dried rocks." Jour.Geotherm.Res.Soc.Japan. vol.17., No.2. 111-121 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Lima, R.F.S., Mizuta, T.and Ishiyama, D.and Fujita, T.: "Tellurium-bearing minerals in Corrego Criminoso gold mining district, Goias State, Brazil." Rept.Research Inst.Natural Resources, Mining College, Akita Univ.No.61. 1-16 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Hida, T., Ishiyama, D., Mizuta, T., and Ishikawa, Y.: "Geologic-characteristics and formation environments of the Yano-Shokozan pyrophyllite deposit, Hiroshima Prefecture, Japan. -Volcanic successions and hydrothermal alteration processes-" Jour.Clay Science Soc.Japan. Vol.36, No.2. 62-72 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Ishiyama, D., Mizuta, T., Sato, H., Futatsugawa, S., and Sera, K.: "Studies on chemical analysis for fluid inclusions in quartz using PIXE." NMMC Research Inst.Prog.Rep.1994. 139-143 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Maglambayan, V.B.Ishikawa, Y., Mizuta, T.and Ishiyama, D.: "Ore textures and fluid inclusion studies of the Uwamuki No.4 Kuroko orebody, Akita Prefecture, Japan." Institute of Mining Geology, Mining College, Akita Univ.No.8. 1-13 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Mizuta, T.: Textbook for Earth Science Course Mineralogy. Textbook in Lectures for Commun.Education of Akita Univ., Mining Coll., 104 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 樋田忠孝・石山大三・水田敏夫: "広島県勝光山パイロフィライト鉱床の生成機構-火山層序と熱水変質作用-" 粘土科学. 36・2. 62-72 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 石山大三・水田敏夫・佐藤比奈子・二ツ川章二・世良耕一郎: "PIXE法による石英中の流体包有物の化学分析の研究" NMCC共同利用研究成果報文集. 3号. 139-143 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Hamano,K.,Mizuta,T.and Ishiyama,D.: "Rare earth element geochemistry of bedded manganiferous iron deposits." Jour.Min.Coll.Akita Univ.,Ser.A,. No.8. 34-45 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] Lima,R.F.S.,Mizuta,T.Ishiyama,D.: "Tellurium‐bearing minerals in Corego Criminoso gold mining district, Goias State, Brazil.," Rept. Research Inst. Natural Resources, Mining College, Akita Univ.No.61. 1-12 (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 藤田豊久・藤光康宏・秋林 智・水田敏夫: "乾燥した岩石における非抵抗の温度依存性に関する実験的研究." 日本地熱学会誌. 17. 111-121 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Mizuta,T.,Ishiyama,D.Ohguchi,T.,Takada,J.: "Characteristic features of chemical composition of bentonite from the Tsukinuno bentonite deposit, Yamagata Prefecture." KURRI Prog. Rept. Sect. I. 5. 118-118 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Maglambayan,V.B.,Ishikawa,Y.,Mizuta,T.and Ishiyama,D.: "Ore textures and fluid inclusion studies of the UwamukiNo.4 Kuroko orebody,Akita Prefecture, Japan." Jour. Min. Coll. Akita Univ., Ser. A,. 8. 1-13 (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] Hida,T.,Mizuta,T.Ishiyama,D.,and Ishikawa,Y.,: "Geology and alteration of pyrophyllite deposits in the Yano‐Shokozan Mining area, Hiroshima Prefecture, Japan." Jour, Min. Coll. Akita Univ., Ser. A,. 8. 14-32 (1996)

    • Related Report
      1995 Annual Research Report
  • [Publications] 水田敏夫: "鉱物学 地球科学コース教科書" 秋田大学通信教育講座., 104 (1995)

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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