The Stratigraphy and Emplacement of the Antrim Lavas (SEAL)

安特里姆熔岩的地层学和位置（海豹突击队）

• 批准号: 2261281
• 金额: --
• 依托单位: University of Birmingham
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2261281
• 关键词: Stratigraphy; Emplacement; Antrim; Lavas; SEAL

Basaltic traps and related intrusions, globally, host a variety of resources including aggregates (Mitchel, 2015), minerals (Lusty, 2017), geothermal (Campbell et al., 2016), and groundwater (Seneger et al., 2015; Babar and Muley, 2018). A detailed understanding of lava emplacement and stratigraphy can provide robust models to aid related resource management and sustainability. This project will focus on the stratigraphy and emplacement of the Antrim Lava Group, with implications and impacts that relate to the management and sustainability of related resources regionally and in similar geological settings worldwide.During continental rifting that led to the opening of the North Atlantic ca. 56 Ma, the Antrim lavas erupted to form the basalt plateau in NE Ireland that includes the iconic Giant's Causeway UNESCO World Heritage site. Much work to date has focused on the petrology and geochemistry of the Antrim Lavas, resulting in a sophisticated understanding of the genesis and evolution of the basalt magma (Gamble et al., 1999). However, relatively little is known about the internal stratigraphy and spatial heterogeneity of the lava sequence. This gap in knowledge inhibits exploration for potential resources such as aggregates, subsurface geothermal sources, platinum group elements, rare metals and groundwater (Robins et al., 2011). The excellent exposure of the lavas, alongside an extensive set of cores and geophysical data, provide an as yet untapped opportunity to generate a high resolution reconstruction of lava emplacement.This project's major work will involve analysis of 20 cores drilled across the plateau that penetrate the basalt sequence, plus 14 more logged boreholes (5 with geophysical logs), complemented by field sampling, collection and analysis of groundwater data, geological logging and mapping, augmented by a suite of laboratory analyses and subsequent modelling. In addition to stratigraphic analysis based on textural, petrological and geochemical characteristics (chemostratigraphy), the project will use magnetic analyses to aid stratigraphic interpretation (critically anisotropy of magnetic susceptibility (AMS) and palaeomagnetism). This will enable development of the most detailed model for the stratigraphy and emplacement of the Antrim lavas to date, improving our understanding of the volcanism that accompanied the rifting of the N. Atlantic, and generating one of the most detailed datasets worldwide that can be used to explore how magma productivity and effusive eruption frequency vary during rifting on kiloyear

在全球范围内，玄武岩圈闭和相关侵入体拥有各种资源，包括骨料（Mitchel，2015）、矿物（Lusty，2017）、地热（坎贝尔等人，2016）和地下水（Seneger等人，2015; Babar and Muley，2018）。详细了解熔岩侵位和地层学可以提供强大的模型，以帮助相关的资源管理和可持续性。该项目将侧重于安特里姆熔岩群的地层学和侵位，以及与区域和世界各地类似地质环境中相关资源的管理和可持续性有关的影响。56 Ma，安特里姆熔岩喷发形成了爱尔兰东北部的玄武岩高原，其中包括标志性的巨人堤道，联合国教科文组织世界遗产。迄今为止，许多工作都集中在安特里姆熔岩的岩石学和地球化学上，从而对玄武岩岩浆的成因和演化有了深入的了解（Gamble等人，1999年）。然而，相对知之甚少的内部地层和空间异质性的熔岩序列。这种知识上的差距阻碍了对潜在资源的勘探，如集料、地下地热源、铂族元素、稀有金属和地下水（Robins等人，2011年）。熔岩的良好暴露，以及大量的岩心和地球物理数据，为生成熔岩就位的高分辨率重建提供了一个尚未开发的机会。该项目的主要工作将包括分析在高原上钻取的20个穿透玄武岩序列的岩心，以及14个记录的钻孔（5个有地球物理日志），辅以实地取样、收集和分析地下水数据、地质记录和绘图，并辅以一套实验室分析和随后的建模。除了基于结构、岩石学和地球化学特征的地层分析（化学地层学）外，该项目还将使用磁性分析来帮助地层解释（磁化率（AMS）和古地磁的临界各向异性）。这将有助于开发迄今为止最详细的安特里姆熔岩地层和就位模型，提高我们对伴随着北大西洋裂谷的火山活动的理解。大西洋，并产生了世界上最详细的数据集之一，可用于探索岩浆生产力和喷发频率如何在千年裂谷期间变化