Earth surface response to Quaternary faulting and shallow crustal structure in the eastern Adria-Alpine collision zone and the Friulian plain

阿尔卑斯山脉东部的南阿尔卑斯-迪纳里德斯地区是整个阿尔卑斯山脉中地壳运动最强烈的地区，因此可以直接探索地球表面对构造活动的反应。在一个由地质学家，地球物理学家和地球化学家组成的联盟中，我们将研究主要活动断层的几何形状，它们的运动感，以及它们如何使用一套跨学科工具来驱动侵蚀：a)来自机载激光雷达调查的新型高分辨率数字高程模型，立体卫星数据，以及无人机的低成本本地调查；b)地震层析成像资料（主要基于SWATH C）和近地表地球物理调查，对活动断层的地表轨迹和地下结构进行成像；c)研究地震现场效应的三维成像技术；D)确定露头和古地震海沟近期变形的年代，以确定长期滑动速率、地震复发间隔和古震级；e)利用河流沉积物中原位宇宙成因10Be的流域侵蚀速率，量化对活动断层的侵蚀反应。本研究将填补地震活动性分布（4D-MB项目地震仪阵列记录）与第四纪断裂的地表表现以及活动构造驱动的侵蚀之间的空白。该研究与SPP 4D-MB的研究主题4（运动模式和地震活动性）和主题2（地表响应）相关联。这项研究将为分析这个人口稠密地区的地震风险和灾害提供重要的见解。

The eastern Southern Alps-Dinarides region of the Alps is subjected to the strongest crustal motion in the entire Alps and thus allows to directly explore the response of Earth's surface to tectonic activity. In a consortium of geologists, geophysicists, and geochemists we will investigate the geometry of major active faults, their sense of motion, and how they drive erosion using a set of interdisciplinary tools: a) new high-resolution digital elevation models from airborne LiDAR surveys, stereo satellite data, and low-cost local surveys with drones; b) seismic tomography data (mainly based on SWATH C) and near-surface geophysical surveys to image surface traces and the sub-surface structure of active faults; c) 3D imaging techniques to investigate earthquake site effects; d) dating of the recent deformation in outcrops and palaeoseismological trenches to determine long-term slip rates, earthquake recurrence intervals, and palaeo-magnitudes; e) quantification of the erosional response to active faulting using catchment-wide erosion rates from in situ cosmogenic 10Be in river sediment. This study shall bridge the gaps between the distribution of seismicity (recorded with the seismograph array in the 4D-MB project), the surficial manifestation of Quaternary faulting, and erosion as driven by active tectonics. The research is linked to research theme 4 (motion patterns and seismicity) and theme 2 (surface response) of the SPP 4D-MB. This study will provide important insight towards analysing seismic risk and hazard in this densely populated area.