Forcing of carbonate mounds and deep water coral reefs along the NW European continental margin

迫使欧洲西北部大陆边缘的碳酸盐丘和深水珊瑚礁

• 批准号: 5393150
• 负责人: Professor Dr. Wolf-Christian Dullo
• 金额: --
• 依托单位: GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel
• 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/5393150?language=en
• 关键词: Forcing; carbonate; mounds; deep; water

Recent discoveries of carbonate mounds covered with cold water corals and related benthic communities along the NE Atlantic Ocean continental margin (Porcupine Bight and north of Porcupine Bank, southeast and southwest Rockall Trough Margin, Norwegian Margin) and of actively venting mud volcanic areas along the continental margin surrounding the Gulf of Cadiz associated with authigenic carbonate crust formation and deep-water reef-like coral build-ups and carbonate chimneys margin, Galicia Bank as well as new discoveries of fossil and recent reef structures in the Mediterranean, raises the question of their origin and development. A major objective of the proposed studies therefore is to establish the forcing conditions of carbonate mound formation and to test the hypothesis of a possible linkage between cold seeps and the development of carbonate mounds, cold water benthic communities and authigenic carbonate formation. This proposal is further directed towards a definition of the geological, geochemical and oceanographical conditions and processes forcing the development of carbonate mounds and establishing the benthic ecology and environmental conditions of carbonate mound and cold water coral reef formation in contrasting areas of the NE Atlantic Ocean and Mediterranean Sea. A third objective is to establish the factors governing lithification and stabilisation of carbonate mounds, and to use these as modern analogues of fossil carbonate build ups. Comparison between recent and past mound forcing conditions will allow development of a model of mound genesis in relation to tectonic, sedimentological, oceanographical and biological extant conditions.

沿着东北大西洋大陆边缘覆盖冷水珊瑚和相关底栖生物群落的碳酸盐土丘的最新发现（豪猪湾和豪猪滩以北，东南和西南罗卡尔槽边缘，挪威边缘）和沿着环绕加迪斯湾的大陆边缘活跃的喷发泥火山区，与自生碳酸盐地壳形成和深水礁状珊瑚建造有关-在地中海的一些新发现，包括海平面上升和碳酸盐烟囱边缘、加利西亚海岸以及新发现的化石和最近的珊瑚礁结构，提出了它们的起源和发展问题。因此，拟议研究的一个主要目标是确定碳酸盐丘形成的强迫条件，并检验冷渗漏与碳酸盐土丘、冷水底栖生物群落和自生碳酸盐形成的发展之间可能存在联系的假设。该提案还旨在界定促使碳酸盐土丘形成的地质、地球化学和海洋学条件和过程，并确定东北大西洋和地中海对比区域碳酸盐丘和冷水珊瑚礁形成的海底生态和环境条件。第三个目标是建立控制碳酸盐岩土丘的石化和稳定化的因素，并将其用作化石碳酸盐岩堆积的现代类似物。最近和过去的土丘强迫条件之间的比较，将允许土丘成因模型的构造，沉积学，海洋学和生物现存条件的发展。