Geometry and Kinematics of Faulting and Dike Intrusion in the Tertiary East Greenland Rifted Margin

第三纪东格陵兰裂谷边缘断层和岩脉侵入的几何和运动学

• 批准号: 9508250
• 负责人: Jeffrey Karson
• 金额: $ 11万
• 依托单位: Duke University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-07-01 至 1998-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9508250&HistoricalAwards=false
• 关键词: Geometry; Kinematics; Faulting; Dike; Intrusion

9508250 Karson This project will conduct mapping and paleomagnetic studies of the East Greenland rifted margin along the northeast branch of the Atlantic Ocean, a uniquely uplifted and exposed area of rifted continental margin. The basaltic lavas of rifted margins are typically imaged on seismic reflection profiles as a series of seaward-dipping reflectors that record a progressive subsidence and flexure of the continental edge during the transition to seafloor spreading. Surface mapping will document the interaction of faulting and basalt intrusion, and the large fjords will afford natural cross sections of key parts of the major structures. The onshore data will be integrated with offshore data to provide a comprehensive view of the internal structure and composition of this continental margin. Logistical support is being provided by the Danish Geological Survey. The results of this project will provide a comprehensive view of the internal structure and composition of this continental margin, and will be applicable to other rifted margins in a variety of tectonic regimes.

9508250 Karson 该项目将对沿着大西洋东北分支的东格陵兰断裂边缘进行绘图和古地磁研究，这是一个独特的隆起和暴露的断裂大陆边缘地区。裂陷边缘的玄武质熔岩在地震反射剖面上通常成像为一系列向海倾斜的反射体，记录了在向海底扩张过渡期间大陆边缘的逐渐沉降和弯曲。地表测绘将记录断层和玄武岩侵入的相互作用，大型峡湾将提供主要结构关键部分的自然横截面。陆上数据将与近海数据结合起来，以全面了解该大陆边的内部结构和组成。丹麦地质调查局正在提供后勤支助。该项目的结果将全面了解该大陆边缘的内部结构和组成，并将适用于各种构造体制的其他裂谷边缘。