Ordovician-Devonian mud rocks from the Rhenohercynian (Mayener Slate, Germany) and the Truchas Basin (Spain) - Deposition and provenance

来自莱诺海西阶（德国 Mayener 板岩）和特鲁查斯盆地（西班牙）的奥陶纪-泥盆纪泥岩 - 沉积和来源

• 批准号: 418008282
• 负责人: Professor Dr. Tom McCann
• 金额: --
• 依托单位: Abteilung Geologie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2023-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/418008282?language=en
• 关键词: Ordovician; Devonian; mud; rocks; Rhenohercynian

Mudrocks contain much of the stratigraphic history within sedimentary successions. Detailed analysis of such successions provides us with a better understanding of the depositional processes responsible for their formation. However, despite their importance, they are generally not incorporated into basin-scale models since they are assumed to contain little diagnostic information. Much work, however, has been carried out in recent years, coincident with their increasing importance as unconventional hydrocarbon reservoirs - leading to a recognition of their value. Sedimentological investigations of fine-grained sediments are problematic, mainly due to the lack of obvious sedimentary structures, and thus a multidisciplinary approach will be used, involving both sedimentary techniques as well as geochemical analysis. The mudstone-rich successions within the Truchas Basin (Spain) and the Hunsrück Slate of Mayen (Germany) are the focus of this study. The successions were deposited in distal shelf (or possibly deeper) settings and the main aim of the project is to examine in detail the depositional environments as well as the sediment provenance. The former will involve high-resolution examination of the sediments in order to determine the processes involved within the depositional setting as well as reconstructing the palaeogeography of both locations. The latter aim will use a range of geochemical and isotopic markers to evaluate the source area as well as using proxies to determine other environmental factors (e.g oxygen content).

泥岩包含了沉积序列中的大部分地层历史。对这种层序的详细分析使我们更好地了解了导致它们形成的沉积过程。然而，尽管它们很重要，但它们通常不会被纳入盆地规模的模型，因为它们被认为包含的诊断信息很少。然而，近年来开展了许多工作，这与它们作为非常规碳氢化合物储集层的重要性日益增加不谋而合--导致人们认识到它们的价值。细粒沉积物的沉积学调查是有问题的，主要是因为缺乏明显的沉积结构，因此将使用多学科方法，既涉及沉积技术，也涉及地球化学分析。特鲁恰斯盆地(西班牙)和亨斯鲁克板岩(德国)内的富含泥岩的层序是本次研究的重点。层序沉积在远陆架(或可能更深)的环境中，该项目的主要目的是详细研究沉积环境以及沉积物的物源。前者将涉及对沉积物的高分辨率检查，以确定沉积环境中涉及的过程，以及重建这两个地点的古地理。后一个目标将使用一系列的地球化学和同位素标记物来评估污染源区域，并使用替代物来确定其他环境因素(例如氧气含量)。