High-resolution sequence stratigraphy of stacked fan delta sequences, Corinth Rift, Greece

希腊科林斯裂谷堆积扇三角洲层序的高分辨率层序地层学

• 批准号: 43434266
• 负责人: Dr. Johan H. ten Veen
• 金额: --
• 依托单位: TNO.NL - Netherlands Institute of Applied Geoscience
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/43434266?language=en
• 关键词: resolution; sequence; stratigraphy; stacked; fan

The effects of tectonism, sediment supply and eustacy on accommodation changes are often difficult to untangle. In this aspect fan deltas are valuable because they are sensitive recorders of depositional variability around the continental-marine (or lacustrine) transition. Here we propose a pilot study that is aimed at the recognition, correlation and high-resolution dating of depositional sequences from basin margin (shelf) to basin centre. For this purpose the Plio-Pleistocene fan delta successions in the Gulf of Corinth are highly appropriate since they are relatively small, well accessible and enable good visual correlations of the entire delta-to-prodelta transect. Drowning or submergence phases of conglomeratic delta topset beds will be detected through cathodolumiscence analyses of the cement composition and –stratigraphy. The expression of depositional sequences in the pro-delta facies will be studied by means of gamma-ray spectrometry, XRD analysis of the clay fraction and palynofacies. The results of these methods can be used as proxies for Milankovitch cyclicity, climatic variability, or the continental influence. It is supposed that the nature of the topset- and prodelta sequences and their correlation will give important information on controls on sediment supply and accommodation changes. Our results will be incorporated into a conceptual sequence stratigraphic framework.

构造主义，沉积物供应和美食对住宿变化的影响通常很难解开。在这一方面，风扇三角洲是有价值的，因为它们是连续盐（或湖泊）过渡周围沉积变异性的敏感记录。在这里，我们提出了一项针对从盆地边缘（架子）到盆地中心的沉积序列的识别，相关性和高分辨率日期的试验研究。为此，科林斯湾的Plio-ple-ple-ple-ple-pelescene Delta演替是非常合适的，因为它们相对较小，易于访问且能够良好的视觉相关性。通过对水泥组成和 - 延伸学的阴极分析，将检测到砾岩三角洲顶床的溺水或淹没阶段。在Pro-Delta相中，沉积序列的表达将通过γ射线光谱法进行研究，粘土馏分的XRD分析和palynofacies。这些方法的结果可以用作Milankovitch循环性，气候变异性或持续影响的代理。预计最高序列和prodelta序列的性质及其相关性将提供有关沉积物供应和适应性变化的控制的重要信息。我们的结果将纳入概念序列地层框架中。