Origin of continental margin bedforms: slides or drift deposits, a rock magnetic approach

大陆边缘地床形态的起源：滑坡或漂移沉积物，岩石磁性方法

• 批准号: 0425919
• 负责人: Neal Driscoll
• 金额: --
• 依托单位: University of California-San Diego Scripps Inst 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 2006-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0425919&HistoricalAwards=false
• 关键词: Origin; continental; margin; bedforms; slides

Funds are provided to resolve a controversy about the origin of the continental margin bedforms comprising the "Humboldt slide" feature off the California coast. Previous workers using seismic reflection and multibeam sonar data have interpreted them as either landslide or drift deposits. The PIs will attempt to resolve the question by using existing sediment cores and apply anisotropy of magnetic susceptibility (AMS) analysis of marine sediment to determine the nature of some continental margin deposits (slide deposit vs. bedforms). Though it has been demonstrated that the AMS method can distinguish slumps from un-deformed sediment, this method has not yet been applied to seafloor structures of unknown origin.

有关加利福尼亚海岸“洪堡滑坡”特征的大陆边缘地貌起源的争议得到了解决。以前的工作人员使用地震反射和多波束声纳数据将其解释为滑坡或漂移沉积物。pi将尝试通过使用现有的沉积物岩心来解决这个问题，并应用海洋沉积物的磁化率各向异性（AMS）分析来确定一些大陆边缘沉积物的性质（滑动沉积物与河床）。虽然AMS方法已被证明可以区分滑塌和未变形的沉积物，但该方法尚未应用于未知来源的海底结构。