Collaborative Research: An Integrated Geomagnetic and Petrologic Study of the Dufek Complex

合作研究：杜菲克杂岩体的综合地磁和岩石学研究

• 批准号: 0537609
• 负责人: Jeffrey Gee
• 金额: $ 39.87万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-10-01 至 2011-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0537609&HistoricalAwards=false
• 关键词: Collaborative; Research; Integrated; Geomagnetic; Petrologic

This project studies remnant magnetization in igneous rocks from the Dufek igneous complex, Antarctica. Its primary goal is to understand variations in the Earth's magnetic field during the Mesozoic Dipole Low (MDL), a period when the Earth's magnetic field underwent dramatic weakening and rapid reversals. This work will resolve the MDL's timing and nature, and assess connections between reversal rate, geomagnetic intensity and directional variability, and large-scale geodynamic processes. The project also includes petrologic studies to determine cooling rate effects on magnetic signatures, and understand assembly of the Dufek as an igneous body. Poorly studied, the Dufek is amongst the world's largest intrusions and its formation is connected to the break-up of Gondwana. The broader impacts of this project include graduate and undergraduate education and international collaboration with a German and Chilean IPY project.

本项目研究南极洲Dufek火成岩杂岩中火成岩的剩余磁化强度。它的主要目标是了解中生代偶极低压（MDL）期间地球磁场的变化，这一时期地球磁场经历了戏剧性的减弱和快速逆转。这项工作将解决MDL的时间和性质，并评估反转率，地磁强度和方向变化，以及大规模的地球动力学过程之间的联系。该项目还包括岩石学研究，以确定冷却速率对磁性特征的影响，并了解Dufek作为火成岩体的组装。杜菲克是世界上最大的侵入体之一，其形成与冈瓦纳大陆的分裂有关。该项目的更广泛影响包括研究生和本科生教育以及与德国和智利IPY项目的国际合作。