Paleomagnetic study on deformation of the eastern part of the Asian continent

亚洲大陆东部变形的古地磁研究

基本信息

  • 批准号:
    14403010
  • 负责人:
  • 金额:
    $ 6.85万
  • 依托单位:
  • 依托单位国家:
    日本
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
  • 财政年份:
    2002
  • 资助国家:
    日本
  • 起止时间:
    2002 至 2005
  • 项目状态:
    已结题

项目摘要

The eastern part of the Asian continent was formed by sequential welding of five micro continents during Paleozoic and Mesozoic eras (Siberian craton, Mongolia block, North China Block, South China Block (SCB) and India). We focus deformation of the eastern part of Asia associated with these collision events. We propose deformation modes in continental southeast Asia on the basis of paleomagnetic studies of Triassic to Eocene strata for the Mongolia block, SCB and Southeast Asia1.Counter-clockwise rotation is observed in the eastern part of the Mongolia block. This rotation is ascribed to post-Late Cretaceous extension that affected the continental basins (the Middle Amur, Sanjiang, Razdolnian, Amur-Zeyn and Songliao basins) of the northeast Chinese Plain along the eastern margin of the Mongolia Block.2.Regional deformation aspects of the SCB are inferred from Middle Triassic paleomagnetic data. An area located between 70 km and 225 km from northern margin of the SCB forms a stable platform where very little relative rotation has been detected later than the Middle Triassic. However, the inner region of this block experienced a clockwise rotation of 12° to 30° with respect to stable outer region. Areas in close vicinity of the Tan-Lu fault were subjected to post-Triassic counter-clockwise rotation by 90゜ with respect to stable tectonic belt.3.We have recognized that three phenomena are important factors for explaining the prominent deformation aspect of Southeast Asia ; that is, fragmentation, coherent rotation and internal deformation associated with displacement. When India collided to Asia, at first, fragmentation occurred. The Chuan Dian fragment and the Shan-Thai block were separated from the continuum Asian continent. Secondly, these continental fragments experienced a coherent tectonic rotation. At the later stage of the collision event, continental fragments experienced internal deformation associated with the southward displacement.
亚洲大陆东部是由古生代和中生代五个微大陆(西伯利亚克拉通、蒙古地块、华北地块、华南地块和印度)连续焊接而成。我们关注与这些碰撞事件相关的亚洲东部的变形。通过对蒙古地块、南海和东南亚三叠纪至始新世地层的古地磁研究,提出了东南亚大陆的变形模式。在蒙古块体的东部观测到逆时针旋转。这种旋转归因于晚白垩世后的伸展作用,该伸展作用影响了东北平原沿蒙古地块东缘的陆相盆地(阿穆尔河中盆地、三江盆地、拉兹多仑盆地、阿穆尔泽因盆地和松辽盆地)2。根据中三叠世古地磁资料,推断出南海的区域变形特征。距离南海北缘70 ~ 225公里的区域形成了一个稳定的台地,中三叠世以后很少发现相对旋转。然而,该块的内部区域相对于稳定的外部区域经历了12°到30°的顺时针旋转。郯庐断裂带附近地区在三叠纪后相对于稳定构造带逆时针旋转90。我们已经认识到三个现象是解释东南亚突出变形方面的重要因素;即破碎、相干旋转和与位移相关的内部变形。当印度与亚洲相撞时,最初发生了分裂。川店块体和山泰块体是从连续的亚洲大陆中分离出来的。其次,这些大陆碎片经历了连贯的构造旋转。在碰撞事件的后期,大陆碎片经历了与南移相关的内部变形。

项目成果

期刊论文数量(34)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Anomalously shallow inclination in middle-northern parts of the South China block : palaeomagnetic study of Late Cretaceous red beds from Yichang area
华南地块中北部异常浅倾角:宜昌地区晚白垩世红层的古地磁研究
  • DOI:
  • 发表时间:
    2006
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Narumoto;K.
  • 通讯作者:
    K.
An example of multicomponent magnetization in welded tuffs : a case study of Upper Cretaceous welded tuffs of eastern Russia
熔结凝灰岩中多组分磁化的一个例子:俄罗斯东部上白垩统熔结凝灰岩的案例研究
Regional deformation features of the South China Block inferred from Middle Triassic palaeomagnetic data
中三叠世古地磁资料推断华南地块区域形变特征
  • DOI:
  • 发表时间:
    2005
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Su;L.
  • 通讯作者:
    L.
An example of multicomponent magnetization in welded tuffs a case study of Upper Cretaceous welded tuffs of eastern Russia
熔结凝灰岩多组分磁化实例——俄罗斯东部上白垩统熔结凝灰岩案例研究
  • DOI:
  • 发表时间:
    2003
  • 期刊:
  • 影响因子:
    0
  • 作者:
    Uno;K.;Y.Otofuji;T.Matsuda;K.Furukawa;T.Mishima;Y.Kuniko;R.Enami;R.G.Kulinich;P.S.Zimin;A.P.Matunin;V.G.Sakhno
  • 通讯作者:
    V.G.Sakhno
Otofuji, Y., T.Matsuda, R.Enami, K.Uno, K.Nishihama, N.Halim, L.Su, H.Zaman, R.G.Kulinich, P.S.Zimin, A.P.Matunin, V.G.Sakhno: "Late Cretaceous and Paleocene paleomangetic results of Sikhote Alin, Far eastern Russia : tectonic implications for the eastern
Otofuji, Y., T.Matsuda, R.Enami, K.Uno, K.Nishihama, N.Halim, L.Su, H.Zaman, R.G.Kulinich, P.S.Zimin, A.P.Matunin, V.G.Sakhno:“白垩纪晚期和古新世
  • DOI:
  • 发表时间:
  • 期刊:
  • 影响因子:
    0
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OTOFUJI Yo-ichiro其他文献

OTOFUJI Yo-ichiro的其他文献

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{{ truncateString('OTOFUJI Yo-ichiro', 18)}}的其他基金

Magnetization process of serpentine
蛇纹石的磁化过程
  • 批准号:
    23654173
  • 财政年份:
    2011
  • 资助金额:
    $ 6.85万
  • 项目类别:
    Grant-in-Aid for Challenging Exploratory Research
Deformation of a continent
大陆的变形
  • 批准号:
    22403012
  • 财政年份:
    2010
  • 资助金额:
    $ 6.85万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Deformation aspect of Asian continent due to continental collision
大陆碰撞导致亚洲大陆变形
  • 批准号:
    18403012
  • 财政年份:
    2006
  • 资助金额:
    $ 6.85万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Deformation feature of the Asian continent
亚洲大陆变形特征
  • 批准号:
    11691129
  • 财政年份:
    1999
  • 资助金额:
    $ 6.85万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Tectonics of eastern margin of the Asian continent
亚洲大陆东缘构造
  • 批准号:
    09440175
  • 财政年份:
    1997
  • 资助金额:
    $ 6.85万
  • 项目类别:
    Grant-in-Aid for Scientific Research (B)
Deformation of Asian continent
亚洲大陆变形
  • 批准号:
    09041109
  • 财政年份:
    1997
  • 资助金额:
    $ 6.85万
  • 项目类别:
    Grant-in-Aid for international Scientific Research

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