Internal and external forcing of submarine diatremes: a case study of a Miocene volcanic field in Sicily

海底diatremes的内部和外部强迫：西西里岛中新世火山场的案例研究

• 批准号: 5453141
• 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: Research Grants
• 财政年份: 2005
• 资助国家: 德国
• 起止时间: 2004-12-31 至 2011-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5453141?language=en
• 关键词: Internal; external; forcing; submarine; diatremes

The relative roles of internal and external forcing of volcanic eruptions will be reconstructed based on a case study of submarine volcanic explosion pipes (diatremes) in the Iblean Mountains (Sicily). The system approach followed integrates stratigraphic, structural, paleontological and petrological/geochemical methods. We also interpret the diatreme evolution in a broad geodynamic context focusing on the relationship between magma generation and surface emplacement prior to the Messinian Salinity Crisis. Specific questions include: How large was the relative influence of external (unlimited supply of seawater, carbonate mud) and internal (CÜ2 and SCVrich magmas) forcing during the multi-stage evolution of diatremes: magma ascent, explosive eruption and diatreme formation? How did the contrasting water depths of eruptions and diatreme emplacement control magma fragmentation mechanisms? Did regional, volcano-isostatic and/or eustatic sea-level changes or other short-term and/or long-term tectonic processes and events influence or trigger partial melting, rise of extremely low volumes of magma and surface eruptions?

火山喷发的内部和外部强迫的相对作用将基于伊布尔山脉（西西里岛）海底火山爆炸管道（diatremes）的案例研究来重建，所遵循的系统方法综合了地层学、结构学、古生物学和岩石学/地球化学方法。我们还在广泛的地球动力学背景下解释了直径演化，重点关注墨西拿盐度之前的岩浆生成和地表就位之间的关系。具体问题包括：在岩浆上升、爆发性喷发和相对岩浆形成的多阶段演化过程中，外部（无限供应的海水、碳酸盐泥浆）和内部（富含CÜ2和SCV岩浆）强迫的影响有多大？喷发和火山喷发的不同水深如何控制岩浆破碎机制？区域、火山均衡和/或海平面变化或其他变化？短期和/或长期构造过程和事件影响或引发部分熔化、极少量岩浆的上升和地表喷发？