Analysis of high-resolution records of geomagnetic secular variations during the last 100 ka recovered from lacustrine and marine sediment profiles - reconstruction of the dynamics of the earth`s magnetic field

从湖泊和海洋沉积物剖面恢复的过去 100 ka 期间地磁长期变化的高分辨率记录分析 - 重建地球磁场的动力学

• 批准号: 5249216
• 负责人: Professor Dr. Jörg F.W. Negendank
• 金额: --
• 依托单位: Helmholtz-Zentrum Potsdam - Deutsches GeoForschungsZentrum (GFZ)
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2000
• 资助国家: 德国
• 起止时间: 1999-12-31 至 2002-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5249216?language=en
• 关键词: Analysis; resolution; records; geomagnetic; secular

The aim of the project is a detailed analysis of the secular variations of the earth's magnetic field during the last 100 ka as recorded in marine and lacustrine sediments, in order to obtain information of the dynamics of the Earth's magnetic field. Based on the high sedimentation rates in lake sediments a time resolution of 200 to 500 years is expected. The data analysis will be focussed on a local, regional and global comparison of features in palaeosecular variation (PSV) records from sites all over the world. Magnetostratigraphic investigations will additionally be performed on sediment cores from Lama Lake, North Siberia, Dead Sea, Israel and Lake Baikal, East Siberia in order to enlarge the data base suitable for the investigations planned. Inter-lake correlation will not only be based on the PSV records but also on the records of relative paleointensity. Therefore the paleomagnetic investigations from the Asian sites mentioned will be completed by the determination of rockmagnetic parameters.

该项目的目的是详细分析海洋和湖泊沉积物中记录的过去100 ka期间地球磁场的长期变化，以获得地球磁场动态的信息。根据湖泊沉积物的高沉积速率，预计时间分辨率为200至500年。数据分析的重点是对来自世界各地的古长期变化（PSV）记录的特征进行局部、区域和全球比较。此外，还将对北西伯利亚的喇嘛湖、以色列的死海和东西伯利亚的贝加尔湖的沉积岩芯进行磁性地层调查，以扩大适合计划调查的数据库。湖间对比不仅要依据PSV记录，还要依据相对古地震强度记录。因此，上述亚洲地区的古地磁研究将通过岩石磁性参数的测定来完成。