Geochemical Reconstruction of Lateral Changes in Cenomanian Epicontinental Shelf Water Masses, Northern Germany

古表海岩石记录中所表现的沉积、物理、化学和生物过程的相互作用是高度复杂的。浅海（浅海）表陆海水块体及其碳循环往往与深陆表盆地和开阔海洋的碳循环分离。这对根据地壳代用数据解释全球长期趋势具有启示意义。在这里，我们提出了一项试点研究，试图分析和解决德国北部塞诺曼尼亚海的近端-远端海水梯度。应用于目标层段（早Cenomanian晚期Mantelliceras dixoni带）地层的工具结合了综合地层校准（生物、层序、事件和旋回地层）和地球化学（C、O、Sr、微量元素）研究，对低mg骨骼方解石和基质泥晶物质进行了横向取样，沿着近端到远端150公里的确定年代的事件层位取样。利用这种高分辨率的方法，我们打算跨越和破译在德国北部塞诺曼尼亚地层的化石和沉积记录中记录的海水块的垂直和水平边界，以进一步提高我们对北方表海结构和水质量动力学的理解。

The interaction of sedimentary, physical, chemical and biological processes that are manifested in the rock record of ancient epeiric seas is highly complex. Shallow (neritic) epeiric seawater masses and their carbon cycle are often decoupled from those of deep epicontinental basins and the open ocean. This has implications for the interpretation of global secular trends based on epeiric proxy data. Here we propose a pilot study attempting to analyze and resolve proximal-distal seawater gradients of the epicontinental Cenomanian sea of northern Germany. The tools applied to the strata of the target interval (late Early Cenomanian Mantelliceras dixoni Zone) combine an integrated stratigraphic calibration (bio-, sequence, event and cyclo-stratigraphy) with geochemical (C, O, Sr, trace elements) investigations of low-Mg skeletal calcite and matrix micrite material sampled laterally along well-dated event horizons over proximal-distal transects of up to 150 km. Using this highresolution approach we intend to cross and decipher vertical and horizontal boundaries of seawater masses as documented in the fossil and sedimentary record of Cenomanian strata of northern Germany in order to further enhance our understanding of the structure and water mass dynamics of Boreal epeiric seas.