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Spatio-temporal volcanic evolution and CO2 storage potential of the mid-Norwegian volcanic rifted margin

挪威中部火山裂谷边缘的时空火山演化和二氧化碳封存潜力

基本信息

批准号：
NE/W004828/1
负责人：
David Jolley
金额：
$ 5.47万
依托单位：
University of Aberdeen
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2021
资助国家：
英国
起止时间：
2021 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=NE%2FW004828%2F1
关键词：
Spatio temporal volcanic evolution CO2

项目摘要

This research proposal links to the International Ocean Discovery Program (IODP) Expedition 396 which will drill several scientific research boreholes along the offshore Norwegian continental margin. The Norwegian margin is one of the best studied examples of a passive rifted margin associated with voluminous magmatic activity. However, key scientific questions associated with the origins of magmatism and its impacts on global climate at this time remain. The objectives of the cruise cover a wide range of high impact scientific research areas including assessing the role of the Iceland plume on excess magmatism, understanding along axis variations in magmatism, determining the nature and depositional environment of volcanism, and assessing the role that magmatism played in driving global warming (Paleocene Eocene Thermal Maximum or PETM) at this time. A secondary goal of the expedition is to appraise the potential of permanent carbon capture and storage (CCS) in the volcanic sequences. This research project will address several of the EXP 396 objectives focusing on three specific areas of research.Objective 1: Understanding the interplay between magmatism and eruption environments during rifting. Volcanic cores will be used to appraise how volcanism and the environment of eruption changed in space and time during continental rifting. Detailed facies analyses of the volcanic sequences will be undertaken to reveal whether the eruptions occurred within subaerial, marginal, or subaqueous environments. Geophysical logging data will be used alongside core observations to build a comprehensive and integrated volcanological model for the borehole penetrated sequences. The geophysical volcanic model will then be used to calibrate extensive 3D seismic surveys in the area which in turn will enable mapping of volcanic facies over large parts of the margin. This aspect of the project will enable new understanding about how extrusive magmatism is linked to margin scale base-level changes which in turn will give new data for testing competing models for volcanic rifted margin evolution such as plume-pulsing versus plate tectonics.Objective 2: Appraising the carbon capture and storage (CCS) potential of break-up related volcanic sequences.Pilot studies on Iceland (Carbfix) and in Washington State, USA (Wallula), have demonstrated that CO2 reacts with basaltic rocks to form carbonate minerals, effectively permanently storing the CO2. Permanent storage clearly reduces the risk of leakage and has been demonstrated to occur over incredibly rapid timescales on the order of a few years. The huge volume of offshore break-up related volcanic sequences that will be tested during EXP. 396 could offer an alternative storage site for permanent storage of anthropogenic CO2. Volcanic sequences can have good reservoir properties, however, extensive weathering and alteration can also significantly diminish and clog up the pore structure. Within this study petrophysical analyses of volcanic cores will be performed to give important new constraints on the reservoir potential and sealing capacity of the Atlantic margin volcanic sequences.Objective 3: Understanding the temporal and spatial evolution of magma petrogenesis within the province and its potential role in driving the PETM. Geochemical analyses from the various volcanic sequences will be used to appraise whether elevated and/or fluctuating mantle temperatures led to excess magmatism in mid-Norway. Regional datasets will be compared to appraise how melting changed along the margin and whether these results resolve competing plume or plate tectonic models. Some sites will target hydrothermal vents associated with break-up related intrusions which caused massive emissions of Greenhouse gases. High resolution core-log-seismic appraisal coupled with isotopic dating of the ejecta layers will hopefully improve the age constraints on these processes in order to better appraise links to the PETM.

这项研究建议与国际海洋发现方案第396次考察有关，该考察将沿着挪威近海大陆边钻探几个科学研究井眼。挪威陆缘是与大量岩浆活动有关的被动裂谷陆缘研究得最好的例子之一。然而，与岩浆活动的起源及其对全球气候的影响有关的关键科学问题仍然存在。这次航行的目标涵盖广泛的高影响力科学研究领域，包括评估冰岛羽流对过量岩浆活动的作用，了解岩浆活动沿沿着的变化，确定火山活动的性质和沉积环境，以及评估当时岩浆活动在推动全球变暖（古新世始新世热极大期）方面的作用。这次考察的第二个目标是评估火山序列中永久性碳捕获和储存（CCS）的潜力。这个研究项目将解决几个EXP 396目标集中在三个特定的研究领域。目标1：了解裂谷过程中岩浆活动和喷发环境之间的相互作用。火山岩芯将用于评估大陆裂谷期间火山活动和喷发环境在空间和时间上的变化。将对火山序列进行详细的相分析，以揭示喷发是否发生在陆上、边缘或水下环境中。地球物理测井数据将与岩心观察一起用于为钻孔穿透序列建立全面综合的火山学模型。地球物理火山模型随后将用于校准该地区广泛的三维地震勘测，这反过来又将能够绘制大部分边缘的火山相。该项目的这一方面将使人们能够对喷出岩浆活动如何与边缘尺度基准面变化相联系有新的认识，这反过来又将为测试火山裂陷边缘演化的竞争模型提供新的数据，例如羽流脉动与板块构造。评估与火山破裂有关的火山序列的碳捕获和储存潜力，在冰岛（Carbfix）和华盛顿州进行试点研究，美国（Wallula）已经证明，二氧化碳与玄武岩反应形成碳酸盐矿物，有效地永久储存二氧化碳。永久储存显然减少了泄漏的风险，并已被证明在几年左右的时间内发生令人难以置信的快速。将在EXP期间测试的大量海上破裂相关火山序列。396可以提供永久储存人为CO2的替代储存地点。火山岩层序可以具有良好的储集性能，然而，广泛的风化和蚀变也可以显著地减少和堵塞孔隙结构。在这项研究中，将进行火山岩芯的岩石物理分析，以提供重要的新的限制的储层潜力和封闭能力的大西洋边缘火山sequences.Objective 3：了解时间和空间演化的岩浆岩石成因省内及其潜在的作用，在驱动的PETM。将使用各种火山序列的地球化学分析来评估是否升高和/或波动的地幔温度导致了挪威中部的过量岩浆活动。区域数据集将进行比较，以评估熔融如何沿沿着边缘变化，以及这些结果是否解决了竞争羽或板块构造模型。一些地点将瞄准与分解相关的入侵相关的热液喷口，这些入侵导致大量温室气体排放。高分辨率岩心-测井-地震评价加上喷出物层的同位素测年，有望改善这些过程的年龄限制，以便更好地评价与古东印度晚更新世的联系。