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

对地球磁场和因果核心发电机过程的理解仍然是固体地球物理中的突出问题之一。膜分子变化提供了场行为的详细记录。该项目将通过研究最近在北大西洋西部发现的七个长活塞岩芯，将这一记录追溯到过去。所有取心沉积物的年龄都不到12万年，全新世的沉积速率至少为10厘米/年，更新世的沉积速率为30厘米/年或更高。这些结果将提供有关地球磁场长期行为的新信息，并为相关的古海洋学研究提供改进的相对年代地层学，这些研究也在这些岩心上进行。拟议的工作将包括对这些岩心进行详细的岩石磁学研究，以估计可能具有古海洋学意义的粒度变化、成岩影响和磁性组构变化。

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.