The Late Tertiary-Quaternary onshore tsunami record of nothern Chile and southern Peru: towards the recognition of diagnostic features of onshore tsunami deposits (short title: Chile-Peru tsunami deposits)

智利北部和秘鲁南部的晚第三纪-第四纪陆上海啸记录：认识陆上海啸沉积物的诊断特征（简称：智利-秘鲁海啸沉积物）

基本信息

批准号：
28034814
负责人：
Professor Dr. Hans Heinrich Bahlburg
金额：
--
依托单位：
Universidad Católica del Norte
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2006
资助国家：
德国
起止时间：
2005-12-31 至 2009-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/28034814?language=en
关键词：
Late Tertiary Quaternary onshore tsunami

项目摘要

The recognition of onshore and offshore tsunami deposits is made difficult by the absence of hitherto recognized uniquely diagnostic features. Also unknown is the hydrodynamical process by which tsunami deposit sediment in both environments. However, the recognition of onshore deposits in particular is crucial to establishing the tsunami record of a basin margin and to evaluating its tsunami risk.- In the proposed project we will study Late Tertiary to Quaternary tsunami deposits preserved on marine terraces at the coasts of northern Chile and southern Peru. We will measure the deposits in the field, derive run-up parameters and sample the siliciclastic deposits for systematic grain-size analysis. Dating of the deposits by AMS-14C, ERS and OSL will establish and better define a hitherto very fragmentary local record which then can be compared to other Pacific margins to differentiate local and regional from teletsunami. The grain-size data to be obtained will improve our understanding of the hydrodynamics of tsunami run-up, the field data will indicate the magnitude of the tsunami impacts at the coasts. The combined data set will finally offer a more representative assessment of the spatial and temporal tsunami hazard and risk affecting the coasts of northern Chile and southern Peru.

由于缺乏迄今为止公认的独特诊断特征，陆上和近海海啸沉积物的识别变得困难。同样未知的是海啸在这两种环境中沉积沉积物的水动力过程。然而，陆上沉积物的识别对于建立盆地边缘的海啸记录和评估其海啸风险至关重要。-在拟议的项目中，我们将研究北部海岸海洋阶地上保存的晚第三纪至第四纪海啸沉积物。智利和秘鲁南部。我们将在现场测量沉积物，推导出启动参数并对硅质碎屑沉积物进行采样以进行系统的粒度分析。通过 AMS-14C、ERS 和 OSL 对沉积物进行测年将建立并更好地定义迄今为止非常零散的当地记录，然后可以将其与其他太平洋边缘进行比较，以区分当地和区域性与远程海啸。获得的粒度数据将提高我们对海啸爆发的流体动力学的理解，现场数据将表明海啸对海岸影响的程度。合并后的数据集最终将为影响智利北部和秘鲁南部海岸的时空海啸灾害和风险提供更具代表性的评估。