Early disagenesis of deep-water coral mounds, Atlantic Ocean

大西洋深水珊瑚丘的早期成岩作用

• 批准号: 356118-2007
• 负责人: Neuweiler, Fritz
• 金额: $ 3.1万
• 依托单位: Université Laval
• 依托单位国家: 加拿大
• 项目类别: Special Research Opportunity Program - Project
• 财政年份: 2009
• 资助国家: 加拿大
• 起止时间: 2009-01-01 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=431950
• 关键词: Early; disagenesis; deep; water; coral

Modern, deep-water coral carbonate mounds of the northern, circum-Atlantic region are known for their support of a high biodiversity, their record of past climatic and oceanographic changes, and their vulnerability to present environmental perturbation such as ocean "acidification". Since their rediscovery in the early 90s of the last century, these deep-water coral mounds are in perennial focus to represent a modern analogue of what geologists know and describe as "mud-rich carbonate mounds". Mud-rich carbonate mounds are important geological structures (evolution of the metazoa, hydrocarbon reservoir rocks) that, however, defy a straightforward explanation of their formation. Indeed, their content of fossils does not allow the recognition of a simple skeletal growth framework as it exits in modern and ancient reef rocks. A number of geological evidences point to the fact that these mounds grew literally "from the inside" via the authigenic precipitation of carbonate minerals during the degradation and cycling of metazoan tissue and related dissolved organic matter. This project takes advantage of a drilling campaign addressed to modern, deep-water coral mounds off Morocco. At present, these mounds are in a stage of suboxic degradation and therefore will allow the exploration of the microbial and organochemical impact on mound formation "caught in the act". This research is performed as an invited Canadian contribution to the MiCROSYSTEMS and CHEMECO projects, two interdisciplinary collaborative research projects of the EUROCORES-EuroDIVERSITY and -EuroDEEP program of the European Science Foundation.

北部大西洋地区的现代，深水珊瑚岩丘以支持高的生物多样性，过去气候和海洋学变化的记录以及它们易于呈现环境扰动（例如海洋“酸化”）而闻名。自从上个世纪90年代初期重新发现以来，这些深水珊瑚丘是多年生的重点，代表了地质学家所知道的现代类似物，并被描述为“富含泥泞的碳酸盐丘”。然而，富含泥浆的碳酸盐土丘是重要的地质结构（后生动物的进化，碳氢化合物储层岩石），但是它不违反了对其形成的直接解释。的确，它们的化石含量不允许在现代和古老的礁石岩石中退出时对简单的骨骼生长框架的识别。许多地质证据表明，这些土墩通过碳酸盐矿物质的身份降水而在降解和循环中的碳酸盐矿物质以及相关溶解的有机物物质的降解和循环过程中，从字面上“从内部”生长。该项目充分利用了摩洛哥现代，深水珊瑚丘的钻探运动。目前，这些土墩处于亚氧化降解的阶段，因此将允许探索微生物和有机化学对土墩形成“捕获在该法案中”的影响。这项研究是作为加拿大对微系统和Chemeco项目的受邀贡献进行的，这是欧洲科学科学基金会的Eurocores -Eurodoverity的两个跨学科合作研究项目。