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

亚洲大陆的东部部分是由古罗佐和中罗马（西伯利亚火山口、蒙古块、华北块、华南块（SCB）和印度）连续焊接的五个微大陆。我们将重点讨论亚洲与这些碰撞事件相关的东部部分的演变。我们提出了在大陆东南亚洲的三角形物理研究的基础上对蒙古块、SCB和东南亚洲的三角形进行修改的模式，而反时钟旋转则被观察到蒙古块的东部部分。这一旋转归因于中国东北平原沿蒙古区东部边缘的东边缘（Amur、Sanjiang、Razdolnian、Amur-Zeyn和Songliao盆地）的后南极洲延伸的后期沉积物。2. SCB的区域变形方面来自中三层白磁数据。在70公里和225公里之间的区域，距离SCB形式的北部边缘是一个稳定的平台，那里的相对旋转比中三角洲晚被检测到。However，这个块的内部区域经历了12°至30°的时钟旋转，并尊重稳定外区域。在Tan Lu错误的近致病性区域被90 °的后三重反时钟旋转引起，并尊重稳定的战术带.3.我们已经认识到，三个现象有三个重要的因素，可以解释东南亚的主要变形方面;它们是与位移相关的碎片、相干旋转和内部变形。当印度与亚洲相撞时，第一次，片段发生。“川田碎片和山-泰块从连续亚洲大陆分离开来。”第二，这些大陆碎片经历了一个相干的纹理旋转。在碰撞事件的稍后阶段，与南部位移有关的大陆碎片经历了与内部变形有关的问题。

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.