当前造山带研究的几个重要问题

SOME IMPORTANT PROBLEMS ON CURRENT OROGEN RESEARCHING

讨论了3个问题：（1）造山带的演化是全球大陆岩石圈演化的重要组成部分，大陆联而不合的现象是两拼接陆块与居间造山带未统一克拉通化的构造标志。造山带演化后期山根是如何消失的，以及它与两侧陆块的一体化过程等问题的研究应成为下一步探索的首选目标。（2）阿尔泰型碰撞造山带的提出具有普遍意义，此类由宽阔消减－增生杂岩组成的造山带，其地球动力学环境可能类似于今天的东南亚，与毗邻长命大洋盆地的复杂边缘海体系有关。（3）斜向会聚和碰撞必然导致平行造山带的走向滑动。应重视此类运动在造山带复杂变位中的作用。

Three problems are discussed in this paper. (1) The evolution of orogenic belt con-stitutes the main part of the global continental lithosphere growth. The phenomnon of conti-nent connected but not united is a tectonic mark, which indicates the amalgamated continents and the interjacent orogen did not complete the unified crotonization. How the orogenic root zones to be cut in the later evolutionary stage and the unified process with the neighbering con-tinental blocks should be taken as a prior task in the future researching work. (2) The Altaitype orogen is of widespread significance. It composed of broad subduction-accretionary com-plex and its tectonic setting is possibly similar to that of the southeast Asia nowadays. The evo-lution of this giant and complex marginal sea edifice is related to the subduction of the long-liveneighboring oceanic basin. (3) The oblique convergence and collision must result in strike-slipalong the orogenic belt. More attention should be paid to their effects in such a complicated dis-location of the orogenic belts.