Using the Massive Messinian Erosion Event as a Natural Experiment to Study the Growth of a Shelfbreak Margin

利用大规模墨西拿侵蚀事件作为自然实验来研究货架边缘的增长

• 批准号: 9911866
• 负责人: Gregory Mountain
• 金额: $ 2.33万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-07-01 至 2002-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9911866&HistoricalAwards=false
• 关键词: Using; Massive; Messinian; Erosion; Event

During the Messinian desiccation of the Mediterranean around 6 m.y. ago, exposed margins were severely eroded to a new base level ca. 2 km below present day sea level, leading to massive subaerial erosion of existing shelf platforms, transforming many margins into basinward dipping ramps. During the subsequent flooding these were then covered by aggrading to prograding Pliocene sediments. The PIs will participate in a French cruise and examine the Rhone River margin. This is a relatively young margin and is well preserved. The cruise will acquire multi-chammel seismic data, which, along with the existing daa, will be interpreted to reconstruct the architecture of the evolving margin, from canyon cutting and incision to late rdevelopment of the sediment wedges.

在地中海的墨西拿干涸期间，大约600万年。前，暴露的边缘被严重侵蚀到一个新的基准面ca。在现今海平面以下2公里，导致现有大陆架平台的大规模陆上侵蚀，将许多边缘转变为盆地内倾斜的斜坡。 在随后的洪水期间，这些沉积物被加积为覆盖的上新世沉积物所覆盖。 PI将参加法国巡航并检查罗纳河边缘。 这是一个相对年轻的边缘，保存完好。 这次航行将获得多通道地震数据，这些数据将与现有的数据资料沿着进行解释，以重建从峡谷切割和切割到沉积楔晚期发育的不断变化的边缘的结构。