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Quaternary tsunami events in the eastern Ionian Sea - reconstructing and modelling extreme events based on interdisciplinary geo-scientific investigations

东爱奥尼亚海第四纪海啸事件——基于跨学科地球科学研究的极端事件重建和建模

基本信息

批准号：
77309729
负责人：
Professor Dr. Helmut Brückner
金额：
--
依托单位：
Geographisches Institut
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2009
资助国家：
德国
起止时间：
2008-12-31 至 2012-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/77309729?language=en
关键词：
Quaternary tsunami events eastern Ionian

项目摘要

The Greek coast between the Ambrakian Gulf and the southern Peloponnese is exposed to the highly tsunamigenic Hellenic Trench. It is characterized by outstanding geomorphological and sedimentological evidence of multiple strong tsunami landfalls. On a (supra-)regional scale, the eastern Ionian Sea tsunami research project focuses on the reconstruction and modelling of Holocene tsunami impacts and their influence on the long-term coastal evolution. Onshore tsunami deposits such as runup and backwash deposits, dislocated mega-blocks and allochthonous sedimentary traces in coastal plain deposits are valuable instruments to reconstruct palaeotsunami events. Event deposits, partly retrieved from vibracores, will be studied by geomorphological, sedimentological, micromorphological, micropalaeontological, geochemical and palaeoenvironmental analyses. Radiocarbon and OSL-datings are first-choice methods to establish a tsunami geochronology. Geoarchaeological studies will help to check how ancient coastal settlements were affected by (palaeo-)tsunami impacts. Field and laboratory studies will result in a GIS-related tsunami field parameter database to adapt and refine computer models of tsunami landfall and long-term coastal evolution. Computer modelling approaches will be based on wave and hydraulic theories, regional digital elevation models and high-resolution remote sensing data and take into account submarine mass movements and/or vertical plate dislocations as potential triggers. The interdisciplinary project is embedded in an international research network and shows a large innovative potential, especially by the application of (i) laser scan photogrammetric methods for modelling mega-block dislocations and (ii) 36Cl surface exposure dating for assessing the age of tsunami deposits and cross-checking other dating methods.

安布拉克湾和伯罗奔尼撒半岛南部之间的希腊海岸暴露在高度海啸的希腊海沟。它的特点是突出的地貌和沉积证据多次强烈的海啸登陆。在（超）区域范围内，爱奥尼亚海东部海啸研究项目的重点是重建和模拟全新世海啸的影响及其对长期海岸演变的影响。海岸平原沉积中的海啸堆积物、断错的巨型块体和异地沉积遗迹是重建古海啸事件的重要手段。事件沉积物，部分恢复从vibracores，将研究地貌，沉积学，微形态，micropalaeontological，地球化学和古环境分析。放射性碳和OSL测年是建立海啸年代学的首选方法。地质考古学研究将有助于检查古代沿海定居点如何受到（古）海啸的影响。实地和实验室研究将产生一个与地理信息系统有关的海啸实地参数数据库，以调整和改进海啸登陆和长期海岸演变的计算机模型。计算机建模方法将以波浪和水力理论、区域数字高程模型和高分辨率遥感数据为基础，并考虑到海底物质运动和（或）垂直板块错位是潜在的触发因素。这一跨学科项目是一个国际研究网络的一部分，显示出巨大的创新潜力，特别是通过应用㈠激光扫描摄影测量法模拟巨型块体位错和㈡ 36Cl表面暴露测年法评估海啸沉积物的年龄和交叉检查其他测年法。