西南马里亚纳-雅浦俯冲带变质岩的岩石地球化学研究：制约洋底高原与俯冲带相互作用机制

洋底高原与俯冲带的相互作用是发展板块构造理论的重要环节，对于深入理解大洋俯冲带的构造演化、陆缘造山及大陆生长机制具有重要意义。西南马里亚纳-雅浦岛弧变质带记录了卡洛琳洋底高原俯冲、碰撞和增生相关的过程，是研究洋底高原与俯冲带相互作用的理想对象。雅浦岛弧的变质岩的原岩性质、构造背景和形成年代等问题一直是雅浦俯冲带研究中争议的焦点，也是厘清菲律宾海板块与太平洋板块边界的岛弧发育历史和构造演化过程的关键。本项目拟对西南马里亚纳-雅浦岛弧变质带的变质岩（绿片岩和角闪岩）开展系统的岩石学、矿物学、年代学和地球化学研究，从时间与空间上联合限定洋底高原的俯冲、碰撞过程系统，阐明卡洛琳洋底高原的俯冲与雅浦岛弧变质岩的成因联系；制约卡洛琳洋底高原的俯冲、碰撞和增生过程及其对西南马里亚纳-雅浦岛弧构造演化的影响，从岩石地球化学的角度来制约洋底高原与俯冲带相互作用的板块动力学机制。

The interaction between oceanic plateau and subduction zone is an important link in the development of plate tectonic theory, which is significant for understanding the tectonic evolution of ocean subduction zone, continental margin orogenesis and continental growth mechanism.The metamorphic rocks in the southwest Mariana-Yap arc record the subduction, collision, and accretion processes of the Caroline Plateau, which are ideal objects for studying the interaction between the oceanic plateau and subduction zone. The geochemical properties, tectonic setting and formation age of metamorphic rocks in the Yap arc have always been the focus of controversy in the study of the Yap subduction zone, and it is also the key to clarify the development history and tectonic evolution of the island arc along the boundary between the Philippine Sea plate and the Pacific plate. This project intends to carry out detailed petrology, mineralogy, chronology and geochemistry studies on the metamorphic rocks (greenschists and amphibolites) in the southwest Mariana-Yap arc. This project jointly defines the subduction and collision process of oceanic plateau from the perspective of time and space. These research will systematically clarify the genetic relationship of the metamorphic rocks between the subduced Caroline Plateau. This project will provide important constraints for the mechanism during the subduction, collision and accretion of the Caroline Plateau, and its influence on the tectonic evolution of the southwest Mariana-Yap Arc, which will provide a petrological and geochemical perspective for the study of the plate dynamics of the interactions between the Oceanic Plateau and subduction zone.