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

PI将参加在托克劳-吉尔伯特海山链上的资助巡航，收集磁数据并利用异常反演技术计算古磁极。他将对12座夏威夷皇帝海山进行反演，并利用极点位置计算出晚白垩世-早第三纪太平洋板块的视极漂移路径。他还将试图了解夏威夷-皇帝弯曲的本质，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，为这些链中的火山活动的时间、太平洋构造、长期地磁场几何形状和真正的极地漂移提供额外的线索。另外两天的航行时间将增加到原来的巡航足够的磁覆盖海底山。

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.