Sedimentation Processes on the Portuguese Margin: The Role of Continental Climate, Ocean Circulation, Sea Level and Neotectonics

葡萄牙边缘的沉积过程：大陆气候、海洋环流、海平面和新构造运动的作用

• 批准号: 5395164
• 负责人: Professor Dr. Gerold Wefer, since 3/2005
• 金额: --
• 依托单位: Subfaculty of Earth Sciences
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2003
• 资助国家: 德国
• 起止时间: 2002-12-31 至 2006-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5395164?language=en
• 关键词: Sedimentation; Processes; Portuguese; Margin; Role

The collaborative project SEDPORT aims to investigate the impact of strong climatic oscillations that have occured in the North Atlantic and over adjacent continents on sedimentary processes and depositional features on the Portuguese shelf and upper slope. Major goals are to better determine the influence of biological productivity, subaerial and submarine sediment transport mechanism on the composition and properties of margin sediment cover during the last glacial-interglacial transition in comparison to modern mean environmental conditions. Hereby special emphasis is given to the question of how these sedimentation processes may have changed under varying climate conditions that affected ocean circulatoin, sea-level, and continental weathering, vegetation and precipitation since the last Ice Age into the Late Holocene. Land-ocean linkages and source to sink relationship for terrigenous material are of particular interest. A synoptic palaeoenvironmental reconstruction of a passive margin including the coastal zone, shelf and slope, taking into account the significant influence of transport and sedimentation processes under varying climates in the hinterland and the ocean, is anticipated as the final product of SEDPORT. For this purpose, comprehensive data sets of sedimentological and compositional parameters form shelf and slope surface sediments and sediment cores will be compiled form existing archives, newly generated data and studied in detail considering palaeoclimatic/environmental mechanism. This all will be put in context with studies of satellite images and documentation of particle transport through the water column with sediment trap deployments, camera systems, and a underwater remotely operated vehicle (ROV) as well as with an estuarine sediment record from the Tagus valley.

SEDPORT合作项目旨在调查北大西洋和邻近大陆发生的强烈气候振荡对葡萄牙大陆架和上斜坡的沉积过程和沉积特征的影响。主要目标是更好地确定生物生产力、陆上和海底沉积物输运机制与现代平均环境条件相比对末次冰期-间冰期过渡期间边缘沉积物覆盖物的组成和性质的影响。因此，特别强调的问题，这些沉积过程可能已经改变了不同的气候条件下，影响海洋circulatoin，海平面，大陆风化，植被和降水，因为最后一个冰河时代到晚全新世。陆源物质的陆海联系和源汇关系特别令人感兴趣。作为SEDPORT的最终产品，预计将对包括海岸带、大陆架和斜坡在内的被动边缘进行天气古环境重建，同时考虑到内陆和海洋不同气候条件下的运输和沉积过程的重大影响。为此目的，将根据现有档案和新产生的数据汇编陆架和斜坡表层沉积物和沉积物岩心的沉积学和成分参数综合数据集，并考虑到古气候/环境机制进行详细研究。这一切都将与卫星图像的研究和通过沉积物捕集器部署，相机系统，水下遥控潜水器（XYP）以及塔霍河流域的河口沉积物记录的水柱粒子传输的文件。