From Localized to Distributed Faulting – Present-day Kinematics of the Southern and Eastern Alps

从局部断层到分布式断层——南阿尔卑斯山和东阿尔卑斯山的现代运动学

• 批准号: 442567237
• 负责人: Dr. Sabrina Metzger
• 金额: --
• 依托单位: Sektion 2.6: Erdbebengefährdung und dynamische Risiken
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/442567237?language=en
• 关键词: Localized; Distributed; Faulting; Present; day

Mountainbuilding in the European Alps is near to its end. The western Alps are practically dead, but in the southern and eastern Alps, near the Italo-Austrian boarder, the Adriatic plate is still underthrusting the orogenic edifice. The region exhibits N-S shortening rates of 2-4 mm/yr and frequent seismicity. Every 100 years in average the region is struck by devastating magnitude M6-7 earthquakes. In the southern Alps the geomorphologic expression of the active Southern Alpine Front is clearly visible, but towards the east and the Slovenian boarder, faulting becomes much more diffuse and unclear.This project aims to better understand and assess the regional tectonics. We combine two space-based geodetic methodologies, Global Navigation Satellite System (GNSS) and radar satellite interferometry (InSAR). We will obtain rate maps of the Earth's surface in high spatial resolution and sensitivity. These will be used as input for a kinematic model, from which we can constrain the geometry, slip rates and locking depths of active faults. The model will also benefit from the findings of other seismologic and geologic partner projects running in-parallel within the SPP. Finally we will obtain a better understanding of the recent activity of the upper crust, which in turn improves the overall insight into the subduction of the Adriatic plate.

欧洲阿尔卑斯山的造山工程已接近尾声。西部阿尔卑斯山实际上已经死亡，但在南阿尔卑斯山和东阿尔卑斯山，靠近意大利-奥地利交界处，亚得里亚海板块仍在俯冲造山建筑物。该地区N-S缩短速率为2-4毫米/年，地震活动频繁。平均每100年，该地区就会发生破坏性的6-7级地震。在南阿尔卑斯山，活跃的南阿尔卑斯山前锋的地貌表现清晰可见，但在东面和斯洛文尼亚边界，断裂活动变得更加分散和不清楚。我们结合了全球导航卫星系统(GNSS)和雷达卫星干涉测量(InSAR)这两种天基大地测量方法。我们将以高空间分辨率和高灵敏度获得地球表面的速率图。这些将被用作运动学模型的输入，我们可以从该模型中约束活动断层的几何形状、滑动速率和锁定深度。该模型还将受益于在SPP内并行运行的其他地震学和地质学伙伴项目的结果。最后，我们将更好地了解上地壳最近的活动，这反过来又提高了对亚得里亚海板块俯冲的整体洞察。