U.S.-France Cooperative Research: The Intensity of the Geomagnetic Field in the Cretaceous

这项为期两年的奖项为美法合作研究白垩纪期间地球磁场强度的变化提供了支持。华盛顿大学的H·保罗·约翰逊和法国吉夫苏尔-伊维特放射性强度研究中心的卡洛斯·拉杰的研究小组参与了这项研究。研究人员将对太平洋西北部未改变的白垩纪火山岩进行古强度实验。在法国的实验室中，这些岩石将接受地磁场强度以及强度和极性反转率之间的相关性测试。这位美国研究人员将地球物理学方面的专业知识带到了这次合作中。这一点得到了法国在古强度实验方面的专业知识的补充。该项目的重点是地磁场强度的长期变化，这将促进对地球发电机的功能以及液核和地球下地幔之间的相互作用的了解。

This two-year award provides support for US-France cooperative research on studies of changes in the strength of the earth's magnetic field during the Cretaceous period. The collaboration involves the research groups of H. Paul Johnson at the University of Washington and Carlos Laj at the Center for Radioactive Intensity Studies, Gif-sur- Yvette, France. The investigators will perform paleointensity experiments on unaltered Cretaceous volcanic rock from the Pacific Northwest. In the French laboratory, the rocks will be tested for geomagnetic field intensity and correlations between intensity and polarity reversal rates. The US investigator brings to this collaboration expertise in geophysics. This is complemented by French expertise in experiments in paleointensity. The project's focus on long-term changes in geomagnetic field strength will advance understanding of function of the geodynamo and interactions between the liquid core and earth's lower mantle.