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)

爱琴海南部的克里斯蒂安纳-圣托里尼-科龙博（CSK）火山区是世界上最危险的火山构造地区之一，对地中海东部构成重大威胁。在这里，不仅发生了欧洲20世纪最强烈的浅层地震（1956年的M7.4），而且还发生了标志性的米诺斯火山爆发，被认为是导致伟大的米诺斯文明衰落的原因。近几十年来的广泛研究已经导致了过去约65万年的陆上圣托里尼火山活动的强大地层学，并揭示了相邻裂谷系统的内部结构以及不同火山中心的相对年代演化。然而，由于大多数火山-沉积序列隐藏在海底之下，CSK油田火山-构造演化的主要观测空白仍然存在。为了解决这些不确定性，IODP第398远征队计划在CSK火山区沿着钻探六个地点。 我们建议在所有六个钻井现场进行岩心-测井地震综合，以解决IODP考察五个主要目标中的四个。通过使用我们广泛收集的地震测线，将受约束的1D地层模型从钻井现场区域性地扩展到整个裂谷盆地和破火山口，我们将能够约束各个火山沉积单元的来源、分布和体积。从这一点上，我们将回答有关的年龄，体积和火山喷发的性质从相邻的克里斯蒂娜和科隆博火山，圣托里尼火山口内的存款性质，米诺斯火山喷发产物的体积，以及裂谷脉冲和火山喷发之间的关系的基本问题。这将使我们能够更好地了解灾害级联的动态，其中构造动荡，火山爆发和质量浪费密切互动。了解这些相互交织的过程对于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。

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.