Active intraplate deformation in central Europe: paleoseismology of the Lower Rhine Embayment

我们提出了一个多学科的研究，以确定最近的突破性地震事件的年龄活动断层在莱茵河下游海湾的南部地区。该项目的主要目标是验证位于d<s:1>仁以南的Untermaubach的0.5m高陡崖与1755/56年d<s:1>仁地震系列有关的假设，发现沿同一陡崖的较老事件，并确定沿下莱茵河东缘的Erft断层系统晚更新世沉积中有多少次事件导致了年轻陡崖。该研究结果将揭示这些缓慢变形断层的近期地震历史和复发间隔，并建立一个新的断层滑动率数据库，用于重新评估该地区的地震危险性。此外，我们将把所有断裂带的地球物理数据与海沟的地质数据进行比较，进一步验证探地雷达、地震、电磁和其他地球物理方法作为重要工具的适用性，以定位和表征潮湿气候地区缓慢移动的活动断层。我们已经完成了所有重要的初步步骤，包括地形测量、岩心取样和地球物理勘探，并已经能够选择合适的挖沟地点。

We propose a multidisciplinary study to determine the age of the most recent ground-breaking earthquake events on active faults in the southern sector of the Lower Rhine Embayment. The main goals of this project are to test the hypothesis that a 0.5m high scarp at Untermaubach, south of Düren, is related to the 1755/56 Düren earthquake series, to discover older events along the same scarp, and to determine how many events were responsible for young scarps in Late Pleistocene deposits of the Erft fault system along the eastern margin of Lower Rhine Embayment. The results of this study will shed light on the recent earthquake history and recurrence intervals of these slowly deforming faults, and lead to a new fault slip-rate data base which will be used to reevaluate seismic hazards in this region. Furthermore, we will compare the geophysical data across alll scarps with the geologic data obtained from the trenches to further calibrate the applicability of GPR, seismic, electromagnetic, and other geophysical methods as important tools, to locate and charactrize slow-moving active faults in humid climatic regions. We already have completed all important preliminary steps, including topographic surveying, drill core sampling, and geophysical exploration, and have been able to select suitables trenching sites.