Stress transfer and Quaternary faulting in the northern Alpine foreland

北部高山前陆的应力传递和第四纪断裂

• 批准号: 365245717
• 负责人: Professor Dr. Klaus Reicherter
• 金额: --
• 依托单位: Geophysikalisches Institut (GPI)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/365245717?language=en
• 关键词: Stress; transfer; Quaternary; faulting; northern

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.

我们建议研究地震性与北阿尔卑斯山脉地区主要断层的断层行为之间的关系。这将通过地震学（精确而精确的低中性测定，断层平面解决方案和应力估计）和新旋转（遥感，近感，近地面地球物理学和地质田间研究）进行跨学科。尽管阿尔卑斯山及其前陆似乎过去曾经历过重大的地震性，但历史地震性只会发现c。 MW 6.9附近的莱茵河上限（urg），中心不确定（S）和因果断层。只有维也纳盆地有古植物学的M〜7证据。地震活动的偏见，（表面）在大地震期间的破裂和北前卫的构造形态之间的偏见尚不清楚。贡献因素可能是即脱位反弹，沉积物负荷，应力脱钩等，但是它们的定量影响不足以了解。我们将研究重点放在SPP的第一项中：Albstadt剪切区（ASZ），Molasse Basin（MB）（MB）和URG的南部。高分辨率的地震性研究（hyposentres，断层平面，压力）将有助于了解断层和长期滑动速率的表面表达。总体而言，这项研究将揭示变形的分布方式，并且是否优先于在结构上复杂且占人群高度的区域中形成故障的重新激活。地震学工作将基于Alparray网络，Kit Kabba数据中心和州地震调查的录音，这提供了一个独特的机会，可以详细研究当地地震。新的和主动的构造研究将研究构造形态与缺乏地震性之间的差异，该研究将集中在年轻的景观（冰川后）以及最年轻的断层沉积物上。所有研究主题都与SPP 4D-MB和ALPARRAY密切相关。