Core-Log-Seismic Integration at an iconic volcanic arc: Unravelling the spa-tio-temporal interplay of magmatism, tectonics, and mass wasting of the Christiana-Santorini-Kolumbo volcanic field (IODP Exp. 398)

标志性火山弧处的岩心-测井-地震一体化：揭示克里斯蒂安娜-圣托里尼-科伦坡火山田的岩浆作用、构造和质量消耗的时空相互作用（IODP Exp. 398）

• 批准号: 506199584
• 负责人: Professor Dr. Christian Hübscher
• 金额: --
• 依托单位: Institut für Geophysik (IfG)
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/506199584?language=en
• 关键词: Core; Log; Seismic; Integration; iconic

The Christiana-Santorini-Kolumbo (CSK) volcanic field in the southern Aegean Sea is one of the most hazardous volcano-tectonic regions in the world, posing a major threat to the eastern Mediterranean. Here, not only Europe’s strongest 20th-century shallow earthquake occurred (M7.4 in 1956), but also the iconic Minoan eruption 1650 BCE which is thought to have contributed to the fall of the great Minoan civilization. Extensive research in recent decades has led to a robust stratigraphy of onshore Santorini volcanism for the past ~650,000 years and revealed the internal architecture of the adjacent rift system as well as the relative chronological evolution of different volcanic centers. However, since most of the volcano-sedimentary sequences are hidden beneath the seabed, major observation gaps regarding the volcano-tectonic evolution of the CSK field remain. To address these uncertainties, IODP Expedition 398 is scheduled to drill six sites along the CSK volcanic field. We propose to conduct core-log seismic integration at all six drill sites to address four of the five primary goals of this IODP expedition. By extending the constrained 1D stratigraphic model from the drill sites regionally throughout the rift basins and the caldera using our extensive collection of seismic lines, we will be able to constrain sources, distributions, and volumes of individual volcano-sedimentary units. From that, we will answer fundamental questions regarding the ages, volumes and nature of volcanic eruptions from the adjacent Christiana and Kolumbo volcanoes, the nature of deposits within Santorini Caldera, the volume of the Minoan eruption products, and the relationship between rift pulses and volcanic eruptions. This will allow us to better understand the dynamics of disaster cascades, in which tectonic unrest, volcanic eruptions and mass-wasting closely interact. Understanding these interwoven processes is crucial for a more reliable risk assessment for this area of high socio-economic importance.

爱琴海南部的克里斯蒂安娜-圣托里尼-科伦博（CSK）火山田是世界上最危险的火山构造区之一，对地中海东部构成重大威胁，这里不仅发生了欧洲20世纪最强的浅层地震。发生过（1956 年 M7.4），而且还有公元前 1650 年标志性的米诺斯火山喷发，人们认为这导致了伟大的米诺斯文明的灭亡近几十年来的广泛研究对过去约 65 万年的圣托里尼陆上火山活动进行了深入的研究，揭示了邻近裂谷系统的内部结构以及不同火山中心的相对年代演化。由于火山-沉积序列隐藏在海底之下，有关 CSK 油田火山-构造演化的主要观测差距仍然存在。 398 号探险队计划沿 CSK 火山田钻探 6 个地点，我们建议在所有 6 个钻探地点进行岩芯测井地震整合，以通过扩展约束一维地层模型来实现本次 IODP 探险队的五个主要目标中的四个目标。利用我们广泛收集的地震线，在整个裂谷盆地和火山口的区域钻探地点，我们将能够限制单个火山沉积单元的来源、分布和体积。由此，我们将回答有关邻近克里斯蒂安娜火山和科伦博火山的火山喷发的年龄、体积和性质、圣托里尼火山口内沉积物的性质、米诺斯喷发产物的体积以及裂谷脉冲与火山之间的关系等基本问题。这将使我们能够更好地了解灾难级联的动态，其中地质构造动荡、火山喷发和大规模浪费密切相关。了解这些相互交织的过程对于对这一具有高度社会经济重要性的领域进行更可靠的风险评估至关重要。