Influence of sea-level rise on carbonate ramp sediment dynamics: Micro-XRF- and XRM-supported investigation of high-energy deposits (Upper Muschelkalk, North Germany)

该研究项目旨在调查南部下萨克森的上Muschelkalk斜坡碳酸盐岩（Trochitenkalk，m7，三叠纪）的沉积动力学，这些碳酸盐岩是在三阶海平面上升期间沉积的。该项目的主要重点是希尔德斯海姆市南部的希尔德斯海姆森林地区。它的特点是一个古高，称为“Hildesheimer Schwelle”和相关的高能量矿床（Trochitenkalk，m7，三叠纪）。以往的研究主要集中在相的划分上。然而，相对较少或没有注意到的横向相分布和连续性，横向相转换，成岩作用和古水动力机制，其重建是一个重要的步骤，以了解沉积动力学。除了标准的沉积学技术来研究露头（例如测井测量、取样、伽马射线光谱）和薄片（偏振光显微镜，阴极发光显微镜），新的工具，如三维X射线显微镜（XRM）和微型X射线荧光光谱扫描仪（XRF）将用于研究与以下主题相关的希尔德斯海姆瓦尔德地区上Muschelkalk系列的岩石样品：- 海平面上升期间沉积和水动力系统的变化。成岩作用分析：沉积构造和成岩作用的相互作用。该项目的成果将提高对海平面上升期间碳酸盐斜坡上沉积系统复杂和不断变化的条件的基本认识，这可能有助于理解和预测现代系统中的类似变化和过程。此外，研究结果将有助于加深对成岩作用过程和相互作用的沉积构造的基本认识。

The research project aims to investigate the sediment dynamics of Upper Muschelkalk ramp carbonates (Trochitenkalk, m7, Triassic) in South Lower Saxony that were deposited during a major third-order sea-level rise. Main focus of this project is the region Hildesheimer Wald, south of the city of Hildesheim. It is characterized by a paleo-high, called “Hildesheimer Schwelle” and related high-energy deposits (Trochitenkalk, m7, Triassic). Previous studies were mainly focused on facies classification. However, relatively little or no attention has yet been paid to the lateral facies distribution and continuity, lateral facies transitions, diagenesis and the paleohydrodynamic regime, whose reconstruction is an important step to understand the sediment dynamics. Besides standard sedimentological techniques to study outcrops (e.g. log measurement, sampling, spectral gamma-ray) and thin sections (polarized light microscopy, cathodoluminescence microscopy), new tools such as an 3D X-Ray Microscope (XRM) and a micro X-Ray Fluorescence Spectrometry scanner (XRF) will be used to investigate rock samples of the Upper Muschelkalk successions in the region Hildesheimer Wald related to the following subjects: -Changes in the sedimentary and hydrodynamic system during rising sea-level.-Diagenesis analysis: Interplay of sedimentary structures and diagenetic processes. The results of the project will improve the fundamental understanding of the complex and changing conditions of the sedimentary system on carbonate ramps during a rising sea-level, which may help to comprehend and to predict similar changes and processes in modern systems. In addition, the results will improve the principal understanding of diagenesis processes and interplaying sedimentary structures.