The Timing, Duration and Correlation of East Greenland Flood Basalt Volcanism

东格陵兰洪水玄武岩火山活动的时间、持续时间和相关性

• 批准号: 9417951
• 负责人: Robert Duncan
• 金额: $ 9.71万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-04-01 至 1998-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9417951&HistoricalAwards=false
• 关键词: Timing; Duration; Correlation; East; Greenland

9417951 Duncan This project is to participate in an international collaborative investigation of the East Greenland portion of the North Atlantic Tertiary Basalt Province. In this project particular emphasis will be placed on the flow-by- flow stratigraphy of basalt flows using field mapping, compositional and paleomagnetic methods, and radiometric ages. These data will be used to constrain both the physical nature and the duration of this exceptionally large volcanic event, to correlate discontinuous sections of East Greenland basalts, and to relate the flow sequences to coastal dike swarms. Overall coordination and logistics for field work are being supplied by the Danish Lithosphere Center. We will participate in field mapping and sample collection, and will contribute radiometric age determinations by the 40Ar-39Ar incremental heating method, to define the timing and duration of volcanism, and in support of constructing a composite volcanic stratigraphy. The timing and duration of volcanism in this province will be used to assess "active" (plume heads) vs "passive" (plume incubation) models of continental rifting in the presence of a mantle plume.

9417951邓肯本项目将参与北大西洋第三纪玄武岩省东格陵兰部分的国际合作调查。 在这个项目中，将特别强调使用野外测绘、成分和古地磁方法以及放射性年龄对玄武岩流进行逐流地层学研究。 这些数据将被用来限制物理性质和持续时间的异常大的火山事件，相关的不连续部分东格陵兰玄武岩，并与流动序列沿海岩墙群。 实地工作的总体协调和后勤工作由丹麦岩石圈中心提供。 我们将参与实地测绘和样品采集，并将通过40 Ar-39 Ar增量加热法进行放射性年龄测定，以确定火山活动的时间和持续时间，并支持构建复合火山地层。 在这个省的火山活动的时间和持续时间将被用来评估“主动”（羽头）与“被动”（羽孵化）模型的大陆裂谷在地幔柱的存在。