Collaborative Research: Hotspot Rift Interaction & Geochemistry of the North Atlantic Mantle: A U.S.-Norwegian Expedition to Sample the Aegir Ridge "Hole" in the Iceland Hots

这笔资金将用于支持美国与挪威调查人员的合作项目，对已灭绝的埃吉尔山脊进行取样，随后进行陆上地球化学分析和地球动力学建模。挪威合作石油公司在该地区的地球物理现场工作和地质采样方面拥有丰富的经验，并将提供约10天的船舶时间以及必要的设备来疏浚Aegir脊轴的暴露陡坡。主要元素和微量元素研究，以及同位素（Pb、Nd、Hf、Sr）分析将进行，大陆裂谷-热点相互作用的3D数值模型将开发，这将定义解释数据所需的物理条件，包括可能的地质情景的定量测试。该项目为学生提供培训，并促进国际合作。

Funds are provided to support the U.S. contribution to a collaborative program with Norwegian investigators to sample the extinct Aegir Ridge, followed by onshore geochemical analyses and geodynamic modeling. Norwegian co-PIs have extensive experience in geophysical field work and geologic sampling in this region and will provide ~10 days of ship time as well as the necessary equipment to dredge the exposed scarps of the Aegir ridge axis. Major- and trace-elements studies, as well as isotope (Pb, Nd, Hf, Sr) analyses will be performed and 3D numerical models of continental rift-hotspot interaction will be developed which will define the physical conditions needed to explain the data, including quantitatively testing of the possible geologic scenarios.The project provides training for students and promotes international collaboration.