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

古陆表海岩石记录中所显示的沉积、物理、化学和生物过程的相互作用是非常复杂的。浅（浅海）陆表海海水质量和碳循环往往与深陆表海盆地和开阔洋的海水质量和碳循环分离。这对基于epeiric代理数据的全球长期趋势的解释具有影响。在这里，我们提出了一个试点研究，试图分析和解决近端-远端海水梯度的北方德国的森诺曼海。应用于目标区间（早赛诺曼晚期Mantelliceras dixoni区）地层的工具将综合地层校准（生物、层序、事件和旋回地层学）与低镁骨架方解石和基质泥晶岩材料的地球化学（C、O、Sr、微量元素）调查相结合，这些材料沿着近端-远端断面上的日期确定的事件层位横向取样，最长可达150 km。使用这种高分辨率的方法，我们打算交叉和破译垂直和水平边界的海水群众记录在化石和沉积记录的北方德国的Cenomanian地层，以进一步提高我们的了解的结构和水体动力学的北方陆表海。

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.