Plume-Ridge Interaction to the North of the Iceland Plume: Kolbeinsey Ridge Iceland Seismic Experiment (KRISE)

冰岛羽流北部的羽流脊相互作用：科尔宾塞海岭冰岛地震实验（KRISE）

• 批准号: 9911243
• 负责人: Emilie Hooft Toomey
• 金额: $ 17.79万
• 依托单位: Carnegie Institution of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-04-01 至 2004-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9911243&HistoricalAwards=false
• 关键词: Plume; Ridge; Interaction; North; Iceland

This is a cooperative project among US, Icelandic, Norwegian, and Japanese scientists. The purpose of the project is to constrain crustal thickness variations to the north of Iceland, along the Kolbeinsey Ridge. Crustal thickness will be measured along two seismic refraction profiles - one along 215 km of the southern Kolbeinsey Ridge from the Tjornes fracture zone northward to the 68 degree offset, and another cross-axis profile extending east from the northern end of the along-axis profile to 10 Ma-old crust. These two profiles will allow the determination of the distance dependence of melt flux at the ridge in the critical range of 200-400 km from the plume center, the asymmetry of the plume influence on the spreading centers to the north and south, and the temporal variability of the plume influence on the ridge over the past 10 Ma.

这是美国、冰岛、挪威和日本科学家的合作项目。该项目的目的是限制冰岛北部科尔宾西山脊沿线地壳厚度的变化。将沿着两条地震折射剖面测量地壳厚度--一条沿着从Tjornes断裂带向北到68度偏移量的科尔贝因西山脊南部215公里处，另一条横轴剖面从沿轴剖面的北端向东延伸到10 Ma前的地壳。这两条剖面可以确定在距羽流中心200-400公里的临界范围内，脊区熔融通量的距离依赖性，以及过去10 Ma期间羽流对脊区向北和向南扩散中心的不对称性，以及羽流对脊区影响的时间变异性。