変成帯研究とテクトニクス Study of the Metamorphic Belts and Tectonics

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著者

    • 渡辺 暉夫 WATANABE Teruo
    • 北海道大学大学院理学研究科地球惑星物質科学教室 Department of Earth and Planetary Sciences, Graduate School of Science, Hokkaido University

抄録

The author picks up the study topics of metamorphic rocks in consideration of the paradigm of plume tectonics. First of all, He refers to minerals which are considered to have derived from the transitional zone and the lower mantle, <I>i.e</I>., inclusions in diamond in kimberlite. A problem of transitional zone origin of the Alpe Arami peridotite is introduced. Subsequently, ultra high pressure (UHP) metamorphic rocks exhumed by continent-continent collision are also briefly introduced. In addition, he reviews a discussion on diamond of possible UHP origin in the New England Fold Belt (NEFB), Australia.<BR>The author emphasizes that tectonics of regional metamorphic belts in global scale relates closely to the formation and subsequent fragmentation of a Late Proterozoic supercontinent, Rodinia, and amalgamation forming new continents. Chronological study, especially by SHRIMP, is effective to estimate linkage among fragmented continental blocks, and an example in northern Japan is referred.<BR>Introduced is the structural studies on the metamorphic belts along the plate collision zones which reveal non-rigidness of the lithosphere. Active deformation in the mountains is explained by not only extrinsic force along the plate boundary but also intrinsic force (gravitational potential energy) acting on the continental lithosphere. Study on deformation of metamorphic rocks composing the lower crust is important to test the effect of the intrinsic force and to reveal the influences of regional surface subsidence behind the subduction zone and mountain building along the collision zones. Modelling by experimental work and computer simulation increase the weights in studies of tectonics of metamorphic belts.

収録刊行物

  • 地學雜誌  

    地學雜誌 106(5), 721-734, 1997-10-25 

    Tokyo Geographical Society

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各種コード

  • NII論文ID(NAID)
    10002236708
  • NII書誌ID(NCID)
    AN00322536
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    0022135X
  • NDL 記事登録ID
    4322567
  • NDL 雑誌分類
    ZM41(科学技術--地球科学)
  • NDL 請求記号
    Z15-169
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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