Processing and interpretation of lower crustal seismic events from recently released industry data to study the influence of deep rooted processes on formation and evolution of the North German Basin and their relation to neo-tectonic activities

中欧盆地系统的石勒苏益格-荷尔斯泰因地区在地质清册、现有数据库和在盆地演化中的关键作用方面堪称杰出的“自然地球科学实验室”。石油和天然气行业收集了一个广泛的数据库。该数据库的基本部分可用于在SPP 1135中进行研究。业界对发布的反射地震数据的采集和处理进行了调整，以使用基本标准的CMP处理对盆地沉积物进行成像，直到泽克斯坦，这在80年代是最先进的处理方法。几个行业概况是使用长偏移(长达4.8公里)和长记录时间(长达14秒行波时间)获得的。这些数据对结晶壳成像的潜力从未被优化过，也只得到了轻微的开发，尽管下地壳的结构和部分莫霍面反射已经在(对于下地壳)粗暴的CMP堆栈中可见。由于结晶地壳的结构提供了指导和影响盆地形成的深部过程的重要信息，我们希望利用现代成像方法，如共反射面(CRS)叠加和现代叠前深度偏移技术以及偏移速度分析，来挖掘工业数据对下地壳的成像潜力。莫霍面深度、莫霍面释放、莫霍面多样性和可能的变质杂岩及其对地震信号的影响是需要研究的一些关键问题。此外，结晶壳和断裂带内的地震事件及其可能的地表延伸也是有待讨论的进一步主题。其中，新的图像将有助于阐明地震特征如何与地壳块体及其构造线条相关联，以及较低的地壳结构如何与重磁异常有关。它们将进一步揭示是否存在阿瓦洛尼亚和元古界沉积的证据，以及莫霍面是否与700°C等温线有关。

The Schleswig-Holstein area of the Central European Basin System qualifies as an outstanding "natural geo-scientific laboratory" in terms of the geological inventory the available database and with regard to its key role in basin evolution. An extensive database was gathered by the Oil- and Gas Industry. Essential parts of this data base became available for research within the SPP 1135. The acquisition and processing by the industry of the released reflection seismic data was tuned to image the basin sediments down to the Zechstein using basically standard CMP processing which was state of the art in the 80ies. Several of the industry profiles were acquired using long offsets (up to 4.8 km) and long recording times (up to 14 sec TWT). The potential of the data to image the crystalline crust was never optimised and only marginally exploited although structures in the lower crust and partly also some Moho reflections were already visible in the (for the lower crust) brute CMP stacks. Since the structure of the crystalline crust provides important information on the deep processes steering and influencing basin formation we want to exploit the imaging potential of the industry data for the lower crust using contemporary imaging methods like the Common Reflection Surface (CRS) stack and modern pre-stack depth migration techniques as well as migration velocity analysis. Moho depth, Moho releif, Moho diversity and possible metamorphic complexes and their effects on siesmic signatures are some of the key issues do be investigated. Moreover, seismic events within the crystalline crust as well as fault zones and their possible surface extensions are further topics to be discussed. Among others, the new images will help to elucidate how seismic signatures relate to crustal blocks and its tectonic lineaments and how lower crustal structures are leated to gravimetric and magnetic anomalies. They will further provide insight whether there is evidence for Avalonia and of Proterozoic sediments and whether the Moho is related to the 700°C isotherm.