Building Topography in a Continental Subduction Orogen: Insights from Geomorphic Analysis and 10Be Denudation Rates of the Albanides

Understanding the relationship between surface and deep geological processes in tectonically active settings, such as subduction orogens, is crucial for unravelling the complex mechanisms driving landscape evolution and topographic growth. Situated on the eastern margin of the Adria plate, at the junction between continental subduction to the north in the Dinarides, and oceanic subduction to the south in the Hellenides, the Albanides offer a prime location for studying this interaction. This study combines topographic and fluvial analysis with basin-wide denudation rates derived from in situ-produced 10Be in quartz-bearing lithologies. Denudation rates from nine basins range from 0.18 to 1.25 mm/yr, with significant spatial variability that correlates well with tectonic structures. These findings suggest a substantial variation in uplift rates across the belt, influenced by deep crustal accretion and fault activity. Specifically, higher rates are observed in the orogenic interior where normal faults are superimposed on a longer wavelength signal, likely resulting from the imbrication of crustal slices scraped off the subducting plate at depth. Our results offer new insights into the geodynamic evolution and tectonic activity of the Albanides, highlighting the need for further research on non-quartz-bearing lithologies to achieve a comprehensive understanding of denudation rates and uplift patterns in the region.厘清构造活动环境（如俯冲造山带）中地表与深部地质作用间的关联，对于解析驱动地貌演化与地形抬升的复杂机制至关重要。阿尔巴尼德斯造山带（Albanides）位于亚得里亚板块（Adria plate）东缘，地处北部迪纳拉造山带（Dinarides）大陆俯冲与南部赫莱尼德斯造山带（Hellenides）洋壳俯冲的交汇地带，是研究此类相互作用的理想区域。本研究将地形与河流分析，与基于含石英岩性中原地生成的¹⁰Be（铍-10）所计算的全盆地剥蚀速率相结合。9个盆地的剥蚀速率介于0.18至1.25毫米/年之间，其显著的空间变异性与构造结构具有良好的相关性。上述结果表明，该造山带内的抬升速率存在显著差异，这一差异受深部地壳增生与断裂活动的影响。具体而言，造山带内部的抬升速率更高，该区域的正断层叠加于更长波长的地球物理信号之上，这一现象可能源于深部俯冲板块刮削下来的地壳岩片形成的叠瓦构造。本研究结果为阿尔巴尼德斯造山带的地球动力学演化与构造活动提供了新的认识，同时指出，为全面理解该区域的剥蚀速率与抬升模式，需进一步开展针对非含石英岩性的相关研究。