Geological and Isotopical Studies on the Pre-cambrian Basement of the Baltic Shield.

• Project/Area Number: 62043032
• Research Category: Grant-in-Aid for Overseas Scientific Research
• Allocation Type: Single-year Grants
• Section: 調査総括
• Research Institution: Shinshu University,Faculty of Science
• Principal Investigator: KURODA Yoshimasu Professor of the Department of Geology.Shinshu University, 理学部, 教授 (20015530)
• Co-Investigator(Kenkyū-buntansha): ILMARI Haapala Professor of the Department of Geology,Helsinki University,Finland, 地質学鉱物学科, 教授 ; MATSUO Sadao Professor of the Department of Chemistry,TokyoInstitute of Technology, 理学部, 教授 (30015490) ; MARUYAMA Takahiko Associate Professor of the Department of Mining Geology,Akita University, 鉱山学部, 助教授 (60006682) ; MORIKIYO Toshiro Assistant of the Department of Geology,Shinshu University, 理学部, 助手 (90115379) ; YAMADA Tetsuo Professor of the Department of Geology,Shinshu University, 理学部, 教授 (30020647)
• Project Period (FY): 1986 – 1987
• Project Status: Completed (Fiscal Year 1987)
• Budget Amount: ¥1,500,000 (Direct Cost: ¥1,500,000); Fiscal Year 1987: ¥1,500,000 (Direct Cost: ¥1,500,000)
• Keywords: Baltic Shield / Hydrogen Isotopic Ratio / Rapakivi Granite / Svecokarelian Movile Belt / Hornblende / 黒雲母

Research Abstract

We have collected about 1,000 pieces of rock-samples of rapakivi granites,Svecokarelian granitoids and Aechean basement granitoids from 500 localities in Finland during the field works supported by the Monbusho International Scientific Research Program in 1986.
Coexisting hornblende and biotite from most of these samples were separated and analysed. D/H ratios,XFE(Feo/FeO+MgO) values and water contents of hornblende and biotite from the rapakivi granites were conspiquously different from the other granitoids, e.g.Svecokarelian granitoids in Finland,Alpine granitoids in Italy and the Japanese granitic rocks so far as we investigated before.
It is not yet certain,howevere,such hydrogen isotopic characetristics of the Finnish rapakivi granites are common to all rapakivi-type granites in global-scale or not. If it so,it is very important to investigate the origin of the magmatic water of the rapakivi granites.

Research Products

• [Publications] KURODA,Y.,YAMADA,T.;TAKANO,O.MATSUO,S.: Chemical Geology (Isotope Geoscience). 60. IN PRESS (1988)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] KURODA,Y.,MASTUO,S.;YAMADA,T.: 岩鉱. 83. IN PRESS (1988)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] 市原優子,森清寿郎,大森昌衛: 地球科学. 42. 17-24 (1988)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] KURODA,Y.;YAMADA,T.;KOBAYASHI,H.;OHTOMO,Y.;YAGI,M.;Matsuo,S.: Chemical Geology (Isotope Geoscience). 58. 283-302 (1986)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] BERZINA,A.F.;KURODA,Y.;SOTONIKOV,V.I.;ILLARINOVA,E.N.: Geology and Geophysics. Acad. NAUK, USSR. 3. 72-81 (1986)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] MORIKIYO,T.: Contrib.Mineral.Petrol.94. 165-177 (1986)
  • Description: 「研究成果報告書概要(和文)」より
• [Publications] Kuroda,Y.,Yamada,T.,Takano,O.,Matsuo,S.: "D/H study on the magnetite-series granitic plutons from Kitakami mountaineous district,Northeast Japan." Chemical Geology(Isotope Geoscience). 60. -in press (1988)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] Kuroda,Y.,Matsuo,S.Yamada,T.: "D/H fractionation during dehydration of hornblende,mica and volcanic glass." Japan.Jour.Pet.Min.Econ.Geol.83. -in press (1988)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] Itihara,Y.,Morikiyo,T.,Omori,M.: "Organic matter in siliceous shale and chert of the Onverwacht Grooup,South Africa." Earth Science. 42. 17-24 (1988)
  • Description: 「研究成果報告書概要(欧文)」より
• [Publications] Kuroda,Y.,Yamada,T.,Kobayashi,H.,Ohtomo,Y.,Yagi,M.Matsuo,s.: "Hydrogen isotope study of the granitic roks of the Ryoke belt,central Japan." Chemical Geology(Isotope Geoscience). 58. 283-302 (1986)
  • Description: 「研究成果報告書概要(欧文)」より