Collaborative Research: The time averaged field initiative: addressing a critical data gap

古地磁数据在地球的各种地球物理研究中发挥着重要作用，包括板块构造重建、磁性地层学和研究古代地磁场(我们称之为古地磁)的行为。自其建立以来，许多古地磁研究中的关键假设一直是，古地磁场的平均方向对应于由地心轴偶极子(GAD)产生的方向，并且从水平面倾斜的磁场提供了足够准确的数据，使其能够用于板块重建。这一提议将增强进入时间平均场模型的基础数据，该模型评估地球磁场可被视为“GAD”的程度。所需要的是来自全球100多个采样点的数据集。最有价值的是，数据集将同时具有方向和强度数据，并具有出色的年龄控制。对数据进行有意义的解释所需的质量意味着，地球上很少有地方有足够的覆盖面。手头的任务令人望而生畏，必须一次一项地进行研究。我们建议在这里开发以色列火山田的潜力，那里有大量的原始数据，包括古地磁方向和K-Ar和40Ar/39Ar年龄。这一提议涉及到对地球最重要的物理属性之一--磁场的理解。磁场是既有方向又有强度的矢量。虽然获取古场方向相对简单，但提取准确的古场强度信息却并非如此。我们建议在这里尝试获取完整的矢量信息，并将其与准确的年龄信息结合在一起，以便对以色列火山中记录的古代磁场进行4-D观察。这项工作有助于理解许多基本过程，包括构造板块的运动，内核在控制地磁场中的作用，以及建立磁场的平均强度以正确看待最近的观测。地磁场的约束对于研究地球深部动力学过程的人是很重要的--S。此外，它还将作为一名研究生的博士论文项目。

Paleomagnetic data play an important role in a variety of geophysical studies of the Earth, including plate tectonic reconstructions, magnetostratigraphy, and studies of the behavior of the ancient geomagnetic field (which we call paleo-geomagnetism). Ever since its inception, the key assumption in many paleomagnetic studies has been that the average direction of the paleomagnetic field corresponds to one that would have been produced by a geocentric axial dipole (GAD), and that the dip of the magnetic field from the horizontal plane provides data of sufficient accuracy to enable their use in plate reconstructions. This proposal will enhance the underlying data that go into time averaged field models, which assess the degree to which the geomagnetic field can be considered "GAD". What is required are data sets with more than 100 sampling sites from all over the globe. To be of most value the data sets would have both directional and intensity data and have excellent age control. The quality required for meaningful interpretation of the data mean that there are very few places on Earth that have adequate coverage. The task at hand is daunting and must be attacked one study at a time. We propose here to exploit the potential of the volcanic fields of Israel, for which there is an enormous amount of preliminary data in the form of both paleomagnetic directions and K-Ar and 40Ar/39Ar dates. This proposal concerns the understanding of one of the most important physical properties of planet Earth, its magnetic field. Magnetic fields are vectors with both direction and strength. While obtaining ancient field directions is relatively straight-forward, extracting accurate ancient field strength information is not. We propose here to attempt to obtain the full vector information and couple it with accurate age information for a 4-D look at the ancient magnetic field as recorded in the volcanics of Israel. This work can contribute to the understanding of many fundamental processes, including the motions of tectonic plates, the role of the inner core in controlling the geomagnetic field, and establishing the average strength of the magnetic field to place recent observations in perspective. Constraints on the geomagnetic field are important to those who study the dynamical processes in Earth?s deep interior. Also, it will serve as the doctoral dissertation project of a graduate student.