ODP Site Survey Rockall Plateau and East Flank of Reykjanes Ridge: Drift Evolution and High Resolution Paleoceanography

ODP 现场调查罗卡尔高原和雷克雅内斯海岭东侧：漂移演化和高分辨率古海洋学

• 批准号: 9218673
• 负责人: Patricia Manley
• 金额: $ 4.06万
• 依托单位: Middlebury College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-04-01 至 1995-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9218673&HistoricalAwards=false
• 关键词: ODP; Site; Survey; Rockall; Plateau

This proposal asks for support to conduct a high-resolution seismic reflection/refraction survey of high-sedimentation-rate drift areas in the North Atlantic south of Iceland. This work will elucidate the paleoceanography of this high-latitude, sub-polar region in times prior to the most recent Northern Hemisphere deglaciation, and assist in identifying drilling targets. Seismic characterization of drift deposits will allow the recovery of high deposition rate sediments (likely 3-10 cm/kiloyear) that hold the key to analysis and interpretation of sub-orbital global change events. Recent stratigraphic analyses from existing sediment and ice cores show that such events can have extremely abrupt onsets. Proposed work is relevant to the Ocean Drilling Program: drilling proposals (s) to sample North Atlantic sediment drifts have been high-ranked by scientists working within the "thematic panel" management review structure of that Program.

这项建议要求支持对冰岛以南北大西洋高沉积速率漂移区进行高分辨率地震反射/折射调查。这项工作将阐明这一高纬度亚极地地区在最近一次北半球冰川消融之前的古海洋学，并有助于确定钻探目标。漂移沉积物的地震特征将允许恢复高沉积速率沉积物（可能为3-10厘米/千万年），这是分析和解释亚轨道全球变化事件的关键。最近对现有沉积物和冰芯的地层分析表明，这样的事件可能发生得非常突然。拟议的工作与海洋钻探计划有关：在该计划的“专题小组”管理审查结构中工作的科学家对北大西洋沉积物漂移取样的钻探建议给予了很高的评价。