Paleomagnetic Secular Variation and Rock Magnetics of High- Sedimentation-Rate Marine Sediments (0-120,000 YBP) from theNorthwest Atlantic Ocean

西北大西洋高沉积率海洋沉积物(0-120,000 YBP)的古地磁长期变化和岩石磁学

• 批准号: 9000465
• 负责人: Steven Lund
• 金额: $ 12.96万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-04-01 至 1992-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9000465&HistoricalAwards=false
• 关键词: Paleomagnetic; Secular; Variation; Rock; Magnetics

An understanding of the Earth's magnetic field and the causal core dynamo processes remains on of the outstanding problems in solid earth geophysics. Paelosecular variation provides a detailed record of field behavior. This project will extend that the record back in time by studying a group of seven long piston cores recently recovered from the western North Atlantic. All of the cored sediments are less than 120,000 years old and have sedimentation rates of at least 10 cm/kyr during the Holocene and 30 cm/kyr or higher during the Pleistocene. The results will provide new information about the long term behavior of the earth's magnetic field and an improved relative chronostratigraphy for related paleoceanographic studies that are also being done on these cores. The proposed work will include detailed rock magnetic studies of these cores to estimate grain size changes, diagenetic influences, and magnetic fabric variations that may have paleoceanographic implications.

对地球磁场的理解和 因果核心发电机过程仍然是一个突出的 固体地球物理学中的问题。年代变异 提供字段行为的详细记录。这个项目 将通过研究一群 七个长的活塞核心最近恢复从 北大西洋西部所有取心沉积物都比 超过120，000年的历史，沉积速率至少 全新世为10 cm/kyr， 更新世研究结果将提供有关 地球磁场的长期行为， 改进的相对年代地层学 古海洋学的研究也在进行， 丹拟议的工作将包括详细的岩石 对这些岩芯进行磁性研究，以估计粒度 变化、成岩作用和磁组构变化 可能具有古海洋学意义的东西