Stress transfer and Quaternary faulting in the northern Alpine foreland

我们建议研究地震活动与北部高山前陆地区主要断裂的断裂行为之间的关系。这将通过地震学(准确和精确的震中测定、断层面解和应力估计)和新构造学(遥感、近地表地球物理和地质实地研究)进行跨学科研究。尽管阿尔卑斯山及其前缘地区过去似乎经历了大地震活动，但历史上的地震活动只在上莱茵河地块附近发现了约6.9毫瓦的地震，震中(S)和发震断层(S)是不确定的。只有维也纳盆地有来自古地震学的7级地震证据。地震活动、大地震时的(地表)破裂与北部前陆构造形态之间的偏差尚不清楚，其原因可能是去冰川反弹、沉积物负荷、应力脱钩等，但它们的定量影响尚不清楚。我们在SPP第一期集中研究了三个地区：阿尔布施塔特剪切带(ASZ)、莫拉塞盆地(MB)和URG的南半部。高分辨率的地震活动研究(震中、断层面、应力)将有助于理解断层和长期滑动速率的地表表达。总体而言，这项研究将揭示变形是如何分布的，以及在这个结构复杂和人口稠密的地区，是否倾向于断层的重新激活而不是新断层的形成。地震学工作将基于阿尔普阵列网络、KIT KABBA数据中心和国家地震调查的记录，这为详细研究当地地震活动提供了独特的机会。构造形态和没有地震活动之间的差异将通过新构造和活动构造研究来研究，这些研究将侧重于年轻的地貌(冰川后)和最年轻的断层沉积。所有研究主题都与SPP 4D-MB和AlpArray密切相关。

We propose to investigate the relationship between seismicity and the faulting behaviour of major faults in the Northern Alpine foreland region. This will be done interdisciplinary by means of seismology (exact and precise hypocentre determination, fault plane solution, and stress estimation) and neotectonics (remote sensing, near-surface geophysics, and geological field studies). Although the Alps and their forelands seem to have experienced major seismicity in the past, historical seismicity only find c. Mw 6.9 near the Upper Rhine Graben (URG), with uncertain epicentre(s) and causative fault(s). Only the Vienna basin has evidence for M~7 from paleoseismology. The bias between earthquake activity, (surface) rupture during major earthquakes and tectonic morphology in the northern foreland remains not understood; contributing factors may be i.e. deglaciation rebound, sediment loading, stress decoupling etc., however their quantitative influence is not sufficiently known.We focus our studies on three areas in the first term of the SPP: the Albstadt Shear Zone (ASZ), the Molasse basin (MB) and the southern half of the URG. High resolution seismicity studies (hypocentres, fault planes, stresses) will help to understand the surficial expression of faults and long-term slip rates. Overall, the study will reveal how the deformation is distributed and if the reactivation of faults is preferred over the formation of new ones in this structurally complicated and highly populated area. The seismology work will be based on recordings from the AlpArray network, the KIT KABBA datacentre and the state earthquake surveys, this offers a unique chance to study the local seismicity in details. The discrepancy between the tectonic morphology and the absence of seismicity will be studied by neo- and active tectonic studies that will focus on young landscapes (post-glacial) and also the youngest fault deposits. All research themes are closely related to SPP 4D-MB and AlpArray.