Geometry and Timing of Upper Oligocene to Miocene Depositional Sequences on the U.S. Middle Atlantic Margin

美国中大西洋边缘上渐新统至中新统沉积层序的几何结构和形成时间

• 批准号: 8911810
• 负责人: Nicholas Christie-Blick
• 金额: $ 61.37万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-03-01 至 1993-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8911810&HistoricalAwards=false
• 关键词: Geometry; Timing; Upper; Oligocene; Miocene

The upper Oligocene to Miocene section of the U.S. middle Atlantic is ideally suited for the study of changes in relative sea level recorded in passive margin sediments. This award supports a high-resolution multichannel and single channel seismic study of the upper Oligocene to Miocene section along the middle Atlantic continental shelf and slope. These seismic data will be integrated with biostratigraphic and Sr-isotope stratigraphic studies of coastal plain outcrops, slope canyon outcrops, wells, and boreholes. The objective will be to determine the geometry and age of Oligocene to Miocene depositional sequences, and to evaluate the role of relative sea- level changes in developing this record. We will evaluate possible causal links between ice-volume (glacio-eustatic) changes inferred from the deep sea 8180 record and depositional sequences dating from this Oligocene to Miocene "ice house world" will be evaluated. This project will provide the data base needed to plan a continental shelf to slope drilling program that will define precisely the age of these depositional sequences and test models of sedimentation and relative sea-level changes.

美国中部晚渐新世-中新世剖面 大西洋非常适合研究 被动边缘沉积物中记录的海平面。 这个奖项 支持高分辨率多通道和单通道 沿沿着上渐新统-中新统剖面的地震研究 中大西洋大陆架和陆坡。 这些地震数据 将与生物地层学和锶同位素结合起来 沿海平原露头、斜坡峡谷 露头、威尔斯和钻孔。 其目的是 确定渐新世至中新世的几何形状和时代 沉积序列，并评估相对海- 在发展这一记录的水平变化。 我们将评估 冰量（冰川-海平面变化）之间可能的因果关系 从深海8180记录和沉积推断的变化 从渐新世到中新世的“冰屋世界”序列 将被评估。 本项目将为今后的研究提供数据基础 需要计划一个大陆架斜坡钻探计划， 将精确地确定这些沉积序列的年龄， 沉积和相对海平面变化的测试模型。