华北克拉通北缘两期晚古生代富闪深成岩系列的岩石成因：示踪壳幔相互作用与克拉通破坏过程

籍助岩石地球化学手段标定带有特定构造和地球动力学过程印记的岩浆事件是进行区域大陆构造重建和表征大陆演化过程的重要途径。本项目以富闪深成岩系列的特征性岩石-地球化学行为示踪会聚大陆边缘复杂壳幔相互作用及克拉通破坏过程为纲领，以华北克拉通北缘两期晚古生代富闪深成岩系列为研究对象，运用传统地质地球化学方法与元素-同位素原位分析手段，确定两个典型地区富闪深成岩系列的岩浆侵入事件序列；厘定各期岩浆作用主体岩石类型的岩石成因和不同岩石类型之间的成因关联，定量化评估岩浆演化过程，反演特征性岩浆行为表征的复杂壳幔相互作用。查明富闪深成岩系列与区域构造活动之间的成因关联，综合类比克拉通北缘其他地区和邻区造山带相关岩浆构造事件，阐明两期富闪深成岩系列的时空分布和迁移特征；为深入认识富闪深成岩系列岩石成因、会聚板块边缘地球动力学过程以及克拉通破坏机制之间的耦合联系提供区域研究案例。

With the guideline of tracing complex crust-mantle interactions along the convergent plate margin and cratonic destruction process through the petrological and geochemical characteristics of appinitic suites, this project intends to present a case study on two episodes of late Paleozoic appinitic suites from the northern North China Craton (NCC) with the integrated application of traditional geological- geochemical methods and in situ analytical techniques. The specific aims are to garner multi-level high-precision petrological and geochemical data, to determine the emplacement ages and intrusive sequences of these suites, to ascertain the petrogenesis of main constituent rock types and their genetic correlations, and to quantitatively assess magmatic processes and deduce the complex crust-mantle interactions inherent in these magmatic suites. By further making systematic comparisons between these suites and the coeval magmatic-tectonic events from other regions of the northern NCC and the neighboring orogenic belt, we would like to outline the spatial-temporal distribution and evolution of the late Paleozoic magmatism in the north China, discuss their evolved geodynamic scenarios, and fully characterize the multiple relationships among appinitic magma genesis, crust-mantle interaction at convergent plate margin and cratonic destruction mechanism.