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

9417951邓肯这个项目是为了参加对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制图、成分和古地磁方法以及放射性年龄来研究玄武岩流动的逐流地层学。这些数据将被用来约束这一异常大的火山事件的物理性质和持续时间，将东格陵兰玄武岩的不连续部分关联起来，并将流动序列与沿海堤坝群联系起来。实地工作的全面协调和后勤由丹麦岩石圈中心提供。我们将参与野外测绘和样品采集，并将通过40Ar-39Ar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，并支持建立复合火山地层学。该省火山活动的时间和持续时间将被用来评估存在地幔热柱的大陆裂谷的“主动”(烟柱头部)和“被动”(烟柱孕育)模式。

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.