俯冲作用实现了地壳与地幔之间物质和能量的交换，并引发地壳和地幔的重塑、改造、构造-岩浆作用和大规模成矿作用，对固体地球的形成与演化有着深远影响。然而，有关俯冲大陆地壳的再循环、部分熔融和壳幔交换仍旧是壳幔相互作用研究中未解决的难点和关键科学问题，相关可供直接应用的高温高压实验研究结果非常有限。本申请将瞄准大陆俯冲隧道中壳幔交换作用这一国际前沿问题，以阿尔卑斯-喜马拉雅造山带这一独特的大陆动力学地质现象为依托，开展壳幔相互作用过程的高温高压实验研究，系统调查不同温压条件下大陆地壳-地幔难熔橄榄岩相互反应过程中熔体和平衡相之间的关系、熔体性质及产物成分和熔融反应过程，准确测定关键微量元素在熔体相中的分配系数。其结果对于理解地球内部物质及能量再循环、壳幔相互作用、俯冲带混合熔融过程、造山带岩浆岩成因以及对进一步发展大陆动力学具有重要的科学意义。

Subduction enables the mass and energy exchange between the crust and the mantle, which defines their growth, reworking, tectonic activities, magmatism and large-scale mineralization, and plays a profound role in the solid Earth’s formation and evolution. However, the melting processes in recycled continental crust and the crust-mantle interaction mechanism still remain poorly constrained. Alarmingly few experimental studies have addressed this issue since most are only around oceanic island arc settings rather than continental subduction zones. More comprehensive and systematic experimental work on this subject needs to be carried out to better understand continental crust-mantle interaction mechanism. Therefore, this proposal aims to conduct a series of HTHP continental crust-refractory mantle hybridization experiments using either natural samples or synthetic materials under different PT conditions, to systematically investigate the phase and melting relations, phase compositions, stability ranges, melting reactions, and trace element partitioning coefficients between hybrid melts and the residue. The obtained new data can be used to evaluate the continental crust-mantle interaction processes during subduction, and to experimentally constrain the origin of Alpine-Himalayan orogenic belt potassium-rich magmatism. In addition, this proposed experimental study will offer new evidence for us to better understand continental dynamics.