Paleomagnetic Study of Seamounts from the Hawaiian-Emperor, Gilbert, and Tokelau Chains: Data to Constrain Pacific Tectonic and Hot Spot Models

PI将加入托克劳-吉尔伯特海山链上一个由资金资助的邮轮，收集磁数据，并使用异常反演技术计算古地磁极。他将在12座夏威夷-帝王海山上进行反演，并将利用极点位置来计算晚白垩世-早第三纪太平洋板块的视极游走路径。他还将试图了解夏威夷-帝王弯曲的性质，无论是由于热点运动还是由于板块运动的变化。这项工作将提高托克劳-吉尔伯特调查的价值，因为它提供了关于这些链中火山活动的时间以及关于太平洋构造、长期地磁场几何和真正的极地漂移的更多线索。为了充分覆盖海山，将在原有邮轮的基础上增加两天的装船时间。

The PI will join a funded cruise on the Tokelau-Gilbert seamount chain to collect magnetic data and calculate paleomagnetic poles with anomaly inversion technique. He will do the inversion on 12 Hawaii-Emperor seamounts and will use the pole positions to calculate a Late Cretacceous-Early Tertiary apparent polar wander path for th Pacific plate. He will also attempt to understand the nature of the Hawaii-Emperor bend, whether it is due to hot spot motion or due to change in plate motion. This work will enhance the value of the Tokelau-Gilbert survey by providing additional clues about the timing of volcanism in these chains and about Pacific tectonics, long-term geomagnetic filed geometry and true polar wander. Two additional days of shiptime will be added to the original cruise for adequate magnetic coverage of the seamounts.