The Opening of the Fram Strait and its influence on sediment transport, climate and ocean circulation between the Arctic Ocean and the North Atlantic

弗拉姆海峡是连接北极和大西洋的唯一深水通道，新近纪的开放和随后的加宽是一个根本性的构造事件，对全球海洋环流和古气候演变以及邻近海洋盆地和沿着大陆边缘的沉积过程产生了广泛的影响。将由此积累的沉积物档案与地震绘图和现有DSDP/ODP岩心的地层信息相结合，将有助于揭示这一深海门户在构造时间尺度上的演变（100.000-1.000.000 yrs）。因此，沉积构造的地震地层学解释将提供关于该地区区域构造、海洋学和古气候发展的有价值的信息，其中包括关于北方冰川历史的信息。为此，我们将使用部分需要重新处理的弗拉姆海峡的AWI地震反射数据。此外，我们还将使用最近提供给我们的分别来自相邻大陆边和共轭大陆边的外部（BGR、NPD、GEUS）地震反射数据。我们的主要目标是根据地震反射模式和内部沉积几何形状确定不同的沉积物堆积机制。有了这些信息，我们又可以重建构造过程以及弗拉姆海峡海洋环流的变化。DSDP/ODP 343、642/643、909、910、912和913站点的已发布年龄模型（其中一些模型在我们的项目期间显然要进行修订）和岩性在确定地震反射体的年代以及从岩性上表征地震单元方面具有重要意义。

The Neogene opening and subsequent widening of the Fram Strait, the only deep-water connection between the Arctic and Atlantic oceans, was a fundamental tectonic event with extensive consequences for the global ocean circulation and paleoclimate evolution as well as for sedimentation processes in the adjacent ocean basins and along the continental margins. Combining the hereby accumulated sediment archives with seismic mapping and with stratigraphic information from existing DSDP/ODP drill cores will help to unravel the evolution of this deep ocean gateway on tectonic time scales (100.000-1.000.000 yrs). The seismostratigraphic interpretation of sedimentary structures will hence give valuable information on the regional tectonic, oceanographic and paleoclimatic development of this area, amongst others on the glacial history of the Northern Hemisphere. To achieve this, we will use AWI seismic reflection data from the Fram Strait that partially need to be reprocessed. Additionally, we will use external (BGR, NPD, GEUS) seismic reflection data from the adjacent and conjugate continental margins, respectively, that were lately made accessible to us. Our main goal is to identify distinct sediment accumulation mechanisms based on seismic reflection patterns and internal sedimentary geometries. With this information, in turn, we can reconstruct tectonic processes as well as changes in the oceanic circulation in the Fram Strait. Published age models (some of them clearly to be revised during our project) and lithologies from DSDP/ODP sites 343, 642/643, 909, 910, 912 und 913 are substantial in dating seismic reflectors as well as characterizing the seismic units lithologically.