Sediment transport processes in the Rockall Through (North Atlantic) with special emphasis on submarine mass wasting

罗科尔海峡（北大西洋）的沉积物输送过程，特别强调海底物质的浪费

• 批准号: 214883357
• 负责人: Professor Dr. Sebastian Krastel
• 金额: --
• 依托单位: Arbeitsgruppe Marine Geophysik und Hydroakustik
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2012-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/214883357?language=en
• 关键词: Sediment; transport; processes; Rockall; Through

The Rockall Trough and its margins offshore Western Ireland form a valuable natural laboratory holding information on slope stability, sediment transport, bottom ocean currents, and glacial/interglacial history and yet it is a relatively lightly-studied area. New seismic and sedimentological data across the northern Rockall Trough will be collected during a cruise with the Irish Research Vessel Celtic Explorer in September 2011. This interdisciplinary cruise aims in i) studying the submarine landslide deposits and especially their spatial extent and temporal distribution as well as internal architecture, ii) examining the effect glacial cycles, and in particular the last British-Irish Ice Sheet (BIIS), had on the sedimentary processes occurring on the NW Irish continental slope, and iii) determining the relationship between the temperature-salinity structure of the water column and backscatter observed on acoustic data. In the frame of this project we propose to acquire and process the seismic data needed for all objectives. Interpretation after the cruise will focus on submarine mass wasting and associated hazards but will also include the characterization of glacial features.

罗卡尔海槽及其西爱尔兰近海边缘形成了一个宝贵的天然实验室，保存着有关斜坡稳定性、沉积物迁移、海底洋流和冰川/间冰期历史的信息，但它是一个研究相对较少的区域。 2011 年 9 月，爱尔兰科考船凯尔特探索者号 (Celtic Explorer) 航行期间将收集罗卡尔海槽北部的新地震和沉积学数据。这次跨学科航行的目的是 i) 研究海底滑坡沉积物，特别是其空间范围和时间分布以及内部结构，ii) 检查冰川循环，特别是最后的英国-爱尔兰冰盖 (BIIS) 对海底滑坡沉积物的影响。 发生在爱尔兰西北大陆坡的沉积过程，以及 iii) 确定水柱的温度-盐度结构与声学数据观测到的反向散射之间的关系。在该项目的框架内，我们建议采集和处理所有目标所需的地震数据。巡航后的解释将集中于潜艇质量浪费和相关危险，但也包括冰川特征的描述。