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

夏威夷-皇帝链、吉尔伯特链和托克劳链海山的古地磁研究：约束太平洋构造和热点模型的数据

• 批准号: 9811326
• 负责人: William Sager
• 金额: $ 9.1万
• 依托单位: Texas A&M Research Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-11-01 至 2002-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9811326&HistoricalAwards=false
• 关键词: Paleomagnetic; Study; Seamounts; Hawaiian; Emperor

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.

PI将参加托克劳-吉尔伯特海山链上的资助巡航，以收集磁性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，并将利用极位计算太平洋板块晚白垩世-早第三纪的视极移路径。 他还将试图了解夏威夷-皇帝弯曲的性质，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-吉尔伯特勘测的价值，提供更多线索，说明这些火山链中火山活动的时间以及太平洋构造、长期地磁场几何形状和真正的极地漂移。 将在原定航行时间的基础上再增加两天的航行时间，以便对海山进行充分的磁性覆盖。