Analysis, impact, feedback and hazard aspects of flank collapses and Plinian eruptions of coupled volcano systems reflected in ODP Leg 157 cores

ODP Leg 157 核心中反映的耦合火山系统的侧翼塌陷和普林尼式喷发的分析、影响、反馈和危害方面

• 批准号: 29365923
• 负责人: Professor Dr. Hans-Ulrich Schmincke
• 金额: --
• 依托单位: Forschungseinheit Magmatische und Hydrothermale Systeme
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/29365923?language=en
• 关键词: Analysis; impact; feedback; hazard; aspects

Highly energetic constructive and destructive major events (flank collapses and Plinian eruptions) and their direct (tsunamis) and long-term (magma composition, eruptive rates, stress field) impact will be reconstructed from volcaniclastic deposits drilled during ODP Leg 157 in the volcanic apron around Gran Canaria. Major issues are the long-term effects of large and sometimes synchronous events that punctuated the evolution of the volcano systems Gran Canaria and Tenerife as reflected in mass flow deposits (synignimbrite turbidites, debrites, major tephra fallout deposits) and the feedback between the two episodically coupled systems. The critical events will be analyzed in selected core intervals of the 4 drill sites, supplemented by field studies. The spatial, temporal, compositional and causal relationships will be assessed by employing a wide spectrum of methods (sedimentology, volcanology, mineralogy, geochemistry, image analysis) and analytical tools, especially high resolution 40Ar/39Ar single crystal dating and laser-ICP-MS. The system analysis will allow an overall synthesis of major volcanic mass transfer events during evolution of both systems and will materially contribute to better understand hazards especially volcanogenic tsunamis triggered by volcanic mega-events.

高能量的建设性和破坏性重大事件（侧翼崩塌和普林尼火山喷发）及其直接（海啸）和长期（岩浆成分、喷发速度、应力场）影响将从ODP第157期在大加那利岛火山围裙周围钻探的火山碎屑沉积物中重建。主要问题是大的，有时是同步事件的长期影响，这些事件中断了大加那利岛和特内里费岛火山系统的演变，反映在大量流动沉积物（synignimbrite浊积岩，碎屑，主要的tephra沉降物沉积物）和两个偶发耦合系统之间的反馈。关键事件将在4个钻探地点的选定岩心层段进行分析，并辅以现场研究。空间、时间、成分和因果关系将采用广泛的方法（沉积学、火山学、矿物学、地球化学、图像分析）和分析工具，特别是高分辨率40Ar/39Ar单晶测年和激光icp - ms进行评估。系统分析将对两个系统演化过程中的主要火山物质传递事件进行全面综合，并将对更好地理解火山灾害，特别是由火山特大事件引发的火山性海啸做出实质性贡献。