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

海平面上升对碳酸盐斜坡沉积物动力学的影响：微型 XRF 和 XRM 支持的高能沉积物调查（德国北部上穆舍尔卡尔克）

• 批准号: 403222211
• 负责人: Dr. Alexander Petrovic
• 金额: --
• 依托单位: Faserinstitut Bremen e.V. (FIBRE)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/403222211?language=en
• 关键词: Influence; sea; level; rise; carbonate

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.

该研究项目旨在研究下萨克森州南部上Muschelkalk斜坡碳酸盐岩（Trochitenkalk, m7，三叠纪）的沉积动力学，这些碳酸盐岩沉积于海平面上升的主要三阶期间。该项目的主要焦点是希尔德斯海姆市南部的希尔德斯海默沃尔德地区。它的特征是古隆起，称为“Hildesheimer Schwelle”和相关的高能矿床（Trochitenkalk, m7，三叠纪）。以往的研究主要集中在相分类上。但是，对于侧相分布与连续性、侧相转换、成岩作用和古水动力机制的研究相对较少或尚未得到重视，而对其重建是了解沉积动力学的重要步骤。除了标准的沉积学技术来研究露头（如测井测量、采样、光谱伽马射线）和薄片（如偏光显微镜、阴极发光显微镜），新的工具，如3D 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Hildesheimer Wald地区上Muschelkalk序列的岩石样本，涉及以下主题：-海平面上升过程中沉积和水动力系统的变化。成岩作用分析：沉积构造与成岩作用的相互作用。该项目的结果将提高对海平面上升期间碳酸盐斜坡沉积体系复杂和变化条件的基本认识，这可能有助于理解和预测现代体系中类似的变化和过程。此外，这些结果将提高对成岩作用过程和相互作用的沉积构造的基本认识。