Deep reaching fluid-flow in the Central European Basin System

中欧盆地系统深层流体流动

• 批准号: 5366929
• 负责人: Professor Dr. Asaf Pekdeger (†)
• 金额: --
• 依托单位: Helmholtz-Zentrum Potsdam - Deutsches GeoForschungsZentrum (GFZ)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2002
• 资助国家: 德国
• 起止时间: 2001-12-31 至 2006-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5366929?language=en
• 关键词: Deep; reaching; fluid; flow; Central

Extensive evidence for rising saline waters has been gathered through three centuries and in different regions of the Central European Basin System. These saline springs are temporary and spatially instable (vagabonding). The ultimate causes are not yet clear, however, the chemistry of the waters indicates a deep (Pre-Tertiary) origin. Rising relatively dense salty waters requires forces, either intrinsic to the basins like thermal variations or external (hydraulic head). Because the topography is rather flat, local effects from a varying hydraulic head are not feasible while preliminary model approaches indicate a sufficiently strong interaction with the temperature field in order to induce free convection. The dynamics of the process will be studied in combining hydrology, water chemistry and modelling. The proposal will directly contribute to the theme "recent state and young processes" of the SPP Dynamics of Sedimentary Systems under Varying Stress Conditions by Example of the Central European Basin-System by evaluating the most likely present day flow regime within the basin fill, its interaction with the thermal field as well as fault systems and salt structures. In addition, the proposed work will need and provide feed back with the theme "Fluid- and salt-dynamics" and will also have some connection to the theme "structure and evolution of the crust" as far as the deep thermal field is considered. The final objective is, to understand the fluid dynamics intrinsic to the basin as well as the effects of possible external forces like the impact of the hydraulic head at the southern margin of the basin.

三个世纪以来，人们在中欧盆地系统的不同地区收集了有关咸水上升的大量证据。这些盐泉是暂时的且空间不稳定（流浪）。最终原因尚不清楚，但是，水域的化学成分表明其起源很深（前第三纪）。相对稠密的咸水上升需要力量，要么是盆地固有的，如热变化，要么是外部的（水头）。由于地形相当平坦，因此变化的水头产生的局部效应是不可行的，而初步模型方法表明与温度场的相互作用足够强以引起自由对流。该过程的动力学将结合水文学、水化学和建模来研究。该提案将直接促进以中欧盆地系统为例的不同应力条件下沉积系统 SPP 动力学的主题“近期状态和年轻过程”，通过评估盆地填充物内最可能的当前流动状态、其与热场以及断层系统和盐结构的相互作用。此外，拟议的工作将需要并提供“流体和盐动力学”主题的反馈，并且就深部热场而言，也将与“地壳的结构和演化”主题有一些联系。最终目标是了解盆地固有的流体动力学以及可能的外力的影响，例如盆地南缘水头的影响。