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.

位于爱琴海南部的克里斯蒂安娜-圣托里尼-科隆博火山区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。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。从中，我们将回答有关邻近的克里斯蒂安纳火山和科隆博火山喷发的年龄、数量和性质、圣托里尼火山口内沉积物的性质、米诺斯喷发产物的数量以及裂谷脉动之间的关系的基本问题。火山爆发。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。