Processed seismic data of Cruise BGR16-2 2016

The major pre-alpine tectonic lineaments as the Glückstadt Graben and the Avalonia-Baltica suture zone run across the southern Baltic. The BalTec expedition aimed at the gapless imaging of these fault systems from the seafloor down to the Paleozoic basement. Scientifically the expedition was motivated by two hypotheses. We postulated that advances and retreats of icesheets during the glacials initiated and reactivated faulting of the Post-Permian succession, thereby generating several kilometers long near-vertical faults and anticlines. We further postulated that – in contrast to the generally accepted text book models – deformation of the initially up to 1800 m thick Zechstein salt started already during salt deposition as the consequence of salt load induced basin subsidence and resulting salt creep. The profile network was further designed to allow for linking the stratigraphy between previously generated local underground models in the frame of the TUNB project. Altogether we collected during cruise MSM52 onboard of R/V Maria S. Merian 62 reflection seismic profiles of an entire length of 3500 km. This data set contains all seismic lines located in the German EEZ (lines BGR16-212 to BGR16-264) as time-migrated version.横亘波罗的海南部的前阿尔卑斯构造线形构造带包含格吕克施塔特地堑（Glückstadt Graben）与阿瓦隆尼亚-波罗的海缝合带（Avalonia-Baltica suture zone）。本次BalTec科考航次旨在对上述断层系统开展全覆盖成像，成像范围从海底直至古生界基底（Paleozoic basement）。本次科考的科学目标基于两项核心假说：其一，冰期内冰盖（ice sheets）的进退过程触发并再活化了二叠纪后地层序列（Post-Permian succession）的断层活动，由此形成了长达数千米的近垂直断层与背斜构造；其二，与学界普遍认可的经典教科书模型相悖，初始厚度可达1800米的蔡希斯坦盐岩（Zechstein salt）的变形早在盐岩沉积阶段便已启动，其诱因是盐负荷引发的盆地沉降及由此产生的盐蠕变。本次测线网格的布设还旨在实现TUNB项目框架下已构建的多套局部地下模型之间的地层对比衔接。本次科考依托"玛丽亚·S·梅里安号"（R/V Maria S. Merian）科考船开展MSM52航次，总计采集了62条反射地震剖面（reflection seismic profiles），总长度达3500千米。本数据集包含所有位于德国专属经济区（Exclusive Economic Zone, EEZ）的地震测线（编号为BGR16-212至BGR16-264）的时间偏移处理版本（time-migrated version）。