A Deep-Penetration Reflection Seismic Study at the Juncture of the Blake Plateau Basin, Carolina Trough, and Southeast Georgia Embayment

布莱克高原盆地、卡罗莱纳海槽和佐治亚州东南部海湾交界处的深穿透反射地震研究

• 批准号: 8711300
• 负责人: Paul Stoffa
• 金额: $ 93.53万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-12-15 至 1991-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8711300&HistoricalAwards=false
• 关键词: Deep; Penetration; Reflection; Seismic; Study

Understanding the deep structure of continental margins is critical in determining the processes by which new ocean basins are formed during continental rifting, in evaluating the response of the continental crust to thermal events which accompany rifting, and in comparing volcanic and sedimentary events which precede and post date rifting events. The East Coast of the U.S. has had a complex geologic history which includes at least two stages of rifting and a major period of continental suturing. Much of this history is preserved in the deep, sedimentary strata along the continental margin. The objective of the present project is to use seismic reflection profiling and refraction data to acoustically image these deep sedimentary layers. These data can then be interpreted to understand the geologic history of the East Coast as well as the processes which accompany stretching and uplift of continental crust during rifting of continental masses. Data will be acquired through lease of a commercially available seismic ship and deployment of ocean bottom seismometers off the southeast coast of the US.

了解大陆边缘的深层结构对于确定大陆裂谷期间新洋盆形成的过程、评估大陆地壳对伴随裂谷而来的热事件的反应以及比较裂谷事件前后的火山和沉积事件至关重要。美国东海岸有一个复杂的地质历史，其中包括至少两个阶段的裂谷和大陆缝合的主要时期。大部分历史都保存在大陆边缘的深层沉积地层中。本项目的目的是利用地震反射剖面和折射数据对这些深层沉积层进行声学成像。这些数据可以用来解释东海岸的地质历史，以及在大陆块体裂谷期间伴随大陆地壳拉伸和隆起的过程。数据将通过租用一艘商用地震船和在美国东南海岸部署海底地震仪来获取。