Fluid flow and authigenic carbonates from southern Hydrate Ridge: Analysis of ODP Leg 204 samples

水合物脊南部的流体流动和自生碳酸盐：ODP Leg 204 样品分析

• 批准号: 5385219
• 负责人: Professor Dr. Gerhard Bohrmann
• 金额: --
• 依托单位: GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2002
• 资助国家: 德国
• 起止时间: 2001-12-31 至 2006-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5385219?language=en
• 关键词: Fluid; flow; authigenic; carbonates; southern

On the second accretionary ridge of the Cascadia continental margin gas hydrates influence many processes including geochemical, biological, oceanographic, geological and tectonic processes. The ridge, known as Hydrate Ridge is characterized by highly dynamic gas hydrate formation and dissociation. Since gas hydrates are not stable over geological time scales, associated carbonates may be used as a proxy for former gas hydrate occurrences. Particularly on Hydrate Ridge, gas hydrate carbonates or clathrites have been described. In order to trace the formation of gas hydrates and their diagenetic changes during time we are planning to conduct geochemical, isotopic and sedimentological investigations on authigenic carbonates which will be drilled during ODP Leg 204.

卡斯卡迪亚大陆边缘第二增生脊上的天然气水合物影响着地球化学、生物、海洋学、地质和构造过程。海脊的特点是高度动态的天然气水合物形成和分解。由于天然气水合物在地质时间尺度上是不稳定的，因此伴生碳酸盐可以用作以前天然气水合物出现的替代物。特别是在海伯利斯海岭，已经描述了天然气水合物碳酸盐或格纹岩。为了追踪天然气水合物的形成及其随时间的成岩变化，我们计划对ODP第204航次期间钻探的自生碳酸盐岩进行地球化学、同位素和沉积学调查。