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Sedimentary petrological comparison of Jurassic clastic rocks between the Mino terrane and the Chichibu terrane

Research Project

Project/Area Number 60480025
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field 地質学一般
Research InstitutionNagoya University

Principal Investigator

ADACHI Mamoru  Department of Earth Sciences, School of Science. Nagoya University, Associate Professor, 理学部, 助教授 (10113094)

Co-Investigator(Kenkyū-buntansha) KOJIMA Satoru  Department of Earth Sciences, School of Science, Nagoya University, Assistant Pr, 理学部, 助手 (20170243)
Project Period (FY) 1985 – 1986
Project Status Completed (Fiscal Year 1986)
Budget Amount *help
¥6,100,000 (Direct Cost: ¥6,100,000)
Fiscal Year 1986: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1985: ¥5,600,000 (Direct Cost: ¥5,600,000)
KeywordsDetrital garnet / Jurassic clastic rocks / Mino terrane / Chichibu terrane / 重鉱物解析
Research Abstract

The main results of this study are as follows:
1. EPMA analyses of detrital garnets in Jurassic sandstones of the Mino terrane have revealed that the garnets are generally of Mg-rich almandine with small amounts of Mn and Ca. These garnets were probably derived from granulite facies pelitic gneisses.
2. Unlike detrital garnets in the Mino terrane, garnets in Jurassic sandstones of the Chichibu terrane are more enriched in Mn and Ca. From the chemical composition of detrital garnets, there was a significant difference in provenance rocks between the Mino and Chichibu terranes.
3. Sandstones of Jurassic Tetori Group in the Hida terrane contain a number of Mg-rich garnets, compositionally similar to those in the Mino terrane. Re-examinations of the Kamihirose conglomerate in the circum-Hida tectonic zone have revealed the occurrence of a garnet-bearing gneiss cobble.
4. Chert clasts containing Permian radiolarians have been found from the Yokoo conglomerate in the circum-Hida tectonic zone.
5. Petrological and geochemical investigations of "Mn-nodules" in Jurassic siliceous shales in the Mino terrane have shown that barite and length-slow chalcedony occur within the nodules. Chemically the Jurassic "Mn-nodules" are quite different from those on the Pacific ocean floor.

Report

(1 results)
  • 1986 Final Research Report Summary
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] 足立守: 瑞浪市化石博物館研究報告. 第12号. 183-196 (1985)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Adachi,M.: Sedimentary Geology. 47. 125-148 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 足立守: 大阪微化石研究会誌. 特別号 第7号. 275-286 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 小嶋智: 大阪微化石研究会誌. 特別号 第7号. 175-179 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 足立守: 地質学雑誌. (1987)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Adachi,M: "The chemical composition of garnets from gneiss clasts in the Kamihirose conglomerate and the Kamiaso conglomerate" Bull.Mizunami Fossil Museum. no.12. 183-196 (1985)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Adachi,M , Yamamoto,K and Sugisaki,R: "Hydrothermal chert and associated siliceous rocks from the northern Pacific: their geological significance as indication of ocean ridge activity" Sedimentary Geology. 47. 125-148 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Adachi,M.: "Rock-forming minerals of Mn-carbonate nodules and layers in Jurassic shales of the Mino terrane: a preliminary report" News of Osaka Micropaleontologists. Special volume no.7. 275-286 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Kojima,S.: "Occurrence of Permian radiolarians from chert pebbles in conglomerate at Yokoo, Nyukawa village, Gifu Prefecture, central Japan" News of Osaka Micropaleontologists. Special volume no.7. 175-179 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Adachi,M.: "Discovery of late Triassic radiolarians from the Ino formation, central Shikoku" J.Geol.Soc.Japan. (1987)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary

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Published: 1987-03-31   Modified: 2016-04-21  

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