Slab configuration beneath the Hellenides by combined teleseismic and local earthquake P-wave tomography – Implications for subduction dynamics, plate motion and deformation

亚得里亚海板块东南缘对整个地中海地区的构造演化起着决定性的作用。在它的南端，世界上最古老的海洋岩石圈被希腊俯冲带吞噬。希腊板块的强烈回滚可能影响了整个亚得里亚海板块的运动和巴尔干半岛的广泛变形。再往北，构造样式转变为大陆俯冲/碰撞，并可能伴随着先前俯冲的岩石圈的撕裂和断裂。覆盖欧洲的岩石圈广泛变形，在欧洲表现出最高的地震危险性。尽管该地区具有重要的地球物理意义，但人们对该地区的研究远不及阿尔卑斯山和亚平宁山脉，因此，关于板块结构和几何形状的一级问题仍存在高度争议。基于现有网络的地震数据，并辅以项目期间部署在该地区的移动宽带站，以实现密集均匀的覆盖，我们的目标是应用远震和局地地震p波层析成像相结合，获得该地区地下地幔结构的高分辨率图像。结合自中生代以来的运动学重建和阿尔卑斯-地中海地区的三维地球动力学建模，这些图像将使我们对该地区的俯冲动力学以及板块运动和变形的驱动因素有新的认识。

The south-eastern margin of the Adriatic plate plays a decisive role for the tectonic evolution of the entire Mediterranean area. At its southern end, the oldest oceanic lithosphere in the world is consumed in the Hellenic subduction zone. Strong rollback of the Hellenic slab presumably influences the motion of the entire Adriatic plate and the broad deformation of the Balkan peninsula. Further north, the tectonic style changes to continental subduction/collision and is probably accompanied by tearing and break-off of the previously subducted lithosphere. The overriding European lithosphere is widely deformed and exhibits the highest seismic hazard in Europe. Despite its geophysical significance, the area is much less well studied than the Alps and the Apennines and, therefore, first-order questions regarding slab configuration and geometry are still highly debated. Based on seismic data from existing networks supplemented by mobile broadband stations deployed in the area during the project to attain a dense and even coverage, we aim to apply a combination of teleseismic and local earthquake P-wave tomography to obtain high-resolution images of mantle structure beneath the area. Together with a compilation of kinematic reconstructions since Mesozoic time and 3D geodynamic modelling of the Alpine-Mediterranean area, these images will allow us to gain new insights into subduction dynamics and the drivers of plate motion and deformation in this region.