Collaborative Research: Sediment Dynamics on the Actively Deforming Waipaoa Continental Slope: An Examination of A Dispersal System Sink

合作研究：主动变形的 Waipaoa 大陆坡上的沉积物动力学：对扩散系统汇的检查

• 批准号: 0405726
• 负责人: Clark Alexander
• 金额: --
• 依托单位: Skidaway Institute of Oceanography
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-09-01 至 2008-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0405726&HistoricalAwards=false
• 关键词: Collaborative; Research; Sediment; Dynamics; Actively

The proposed work will focus on the continental slope of the MARGINS' Source-to-Sink focus site offshore Waipaoa with three broad questions in mind: 1) whether the main depocenter has changed during the late Holocene; 2) are sediment gravity flows a significant mode of dispersal, and thus do tectonic features on the margin serve as conduits; and 3) does active intra-slope sediment redistribution overwhelm the large terrestrial input signals. The project will conduct a Chirp seismic survey and obtain cores, augmented by existing multibeam data. Sediment accumulation and mixing rates will be studied with short half-life radio-nucleides. Tephra layers may also provide critical chronology.

建议的工作将集中在Waipaoa近海边缘源-汇集中地点的大陆斜坡上，并考虑三个广泛的问题：1)主沉积中心在全新世晚期是否发生了变化；2)泥沙重力流是否是一种重要的扩散方式，边缘构造特征是否为扩散的管道；3)活跃的坡内沉积物再分布是否会淹没大量陆地输入信号。该项目将进行Chirp地震调查并获得岩心，并辅以现有的多波束数据。沉积物堆积和混合速率将用短半衰期放射性核素进行研究。Tephra层也可以提供关键的年表。