雅鲁藏布江缝合带中段构造特征及成因模式新见解

雅鲁藏布江缝合带中的蛇绿岩在西藏南部不同地段,表现形式并不相同.通过对缝合带中段的构造特征及蛇绿岩组合特征的深入研究,认为印度板块的大陆地壳北缘具有特殊的波状弯曲的几何边界--东西两端为向北突出的犄角,构造结之间为向南突出的弧形边界.这种特殊的边界条件,在新特提斯洋俯冲碰撞过程中,新特提斯洋首先在突出结点处完成关闭,而...

The structure feature on the middle of the Yarlung Zangbo suture zone and a new knowledge of genetic model

The ophiolite in Yarlung Zangbo Suture Zone displays different forms with different areas in southern Tibet. With the research on tectonic characteristics and the composite feature of ophiolite in the middle Suture Zone which shows that the northern edge of Indian plate the continental crust had an overall bending wavy (for things on both sides of the peaks protruding shape, the middle of the trough to the south concave shape), Special boundary conditions that lead to the Neo-Tethys Ocean first closed and collision in the both protruding node in the process of subduction-collision, but since the two nodes begin orogeny, collision orogeny by the middle of things on both sides to move gradually, and growing at both ends. In the Indian plate two protruding between the oceanic crust as orogeny did not dive into the Eurasian continent, the ultimate in Ngamring - cloth-formed around a residual basin, in the latter part of the fold orogenic process, the whole crust Uplift, residual basin disappeared, The remnants of oceanic crust due to thrust into the exposed surface in today's middle section of the Yarlung Zangbo suture zone ophiolite.