摘要:缝合带是两个板块间的分界面，是造山带的一级构造界面。古老造山带常经历过多期构造作用，缝合带被改造，结构复杂化，给造山带研究带来挑战。因此，合理厘定具有复杂结构的缝合带，是造山带研究的重中之重。其中一种途径就是依据混杂物质的亲缘性来趋近缝合带的位置。苏鲁超高压变质带（造山带或构造杂岩带）形成于三叠纪华南向华北板块的深俯冲作用过程，此后又经历古太平洋板块的早期俯冲作用和白垩纪伸展及走滑作用的影响。晚期事件对缝合带改造较大，缝合带的厘定工作较为困难。本研究：1）开展胶东半岛乳山地区变质基性岩及花岗片麻岩的年代学研究工作；2）综述桃村断裂以东物质组成特征；3）解析苏鲁地区关键部位构造变形特征；4）提出苏鲁地区三叠纪造山作用缝合带的形成及后期受构造破坏后缝合带变形特征的理论模型。最终根据缝合带形成和破坏的理论模型，分析苏鲁地区缝合带的大致位置，以此为缝合带的厘定提供理论基础和现实依据。
关键词: 多期构造事件/
缝合带破坏/
苏鲁地区/
构造杂岩带
Abstract:Suture zone is an interface between two plates and is also the First-level structural interface in an orogenic belt. Ancient orogenic belts often experienced multi?stage structural events, and the suture zone was modified. Its structure became much more complicated, which give a significant challenge to do research about the orogenic belt. Therefore, how to reasonably determine the suture zone with complicated structure will be the most significant thing in orogenic belt research. One way is to approach the position of the suture zone based on the affinity of the mixed substances between two plate. The Sulu UHP metamorphic belt （orogenic belt or tectonic complex belt） was produced by the northward deep subduction of South China to North China plate during the Triassic. The belt later experienced the influences of early subduction of the Paleo-Pacific plate （Yanshan Movement） and Cretaceous extension and strike-slip motion. It was difficult to determine the final position of the suture zone because the later events modified it a lot. In this study, we 1） conducted chronological research on related samples in the Rushan area, Jiaodong Penisula; 2）reviewed the material composition characteristics east of the Taocun fault; 3） analyzed the structural deformation characteristics of a critical point in the Sulu area; 4） provide a theoretical model about the formation of the Triassic orogenic suture zone in the Sulu area and the deformation characteristics of the suture zones after later tectonic events destruction. Finally, according to the theoretical model of the formation and destruction of the suture zone, we analyzed the approximate position of the suture zone in the Sulu area in order to provide a theoretical and practical basis for the determination of the suture zone after its experienced multiple tectonic destructions.
Key words:Multiple tectonic events/
Suture zone destruction/
Sulu area/
Tectonic complex belt
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