Collaborative Research: Archaeomagnetic Investigations of Geomagnetic Field Behavior in North and South America

在美国，古地磁学主要用于 作为一种考古年代测定技术， 研究地球的磁场 该项目将充分利用- 对考古遗址进行年代测定，以获取古地磁数据 这涉及到三个问题：1）方向和强度 1550年至1560年间，西半球的地点 公元1800年，2)连续记录的方向变化， 公元前200年的美国西南部。到公元1800年，（3）记录 在过去的一万年里， 美国参考 在每一种情况下，古地磁学都可以阐明重要的 关于地球磁场行为的问题， 都是从历史研究的最新进展中产生的 快速沉积的沉积物和熔岩流。 虽然 标准的古地磁程序将在 调查过程中，一个重要的附加组成部分 将详细研究磁性矿物学和岩石 各种样品的磁性。 这些研究， 从来没有系统地研究过古磁性材料， 为我们的测量提供了更坚实的古地磁基础， 使并将提供新的见解的相对优点， 不同的考古材料和考古磁性技术。

In the United States archaeomagnetism has been used primarily as an archaeological dating technique and has seldom been used to study the Earth's magnetic field. This project will use well- dated archaeological sites to acquire archaeomagnetic data relating to three problems: 1) the direction and intensity of the field at spot locations in the Western Hemisphere between 1550 and 1800 A.D., 2) the continuous record of directional changes in the American Southwest from 200 B.C.. to 1800 A.D., and 3) the record of intensity changes over the past 10,000 years in North and South America. In each case archaeomagnetism can clarify important questions about the behavior of the Earth's magnetic field that have arisen from recent advances in the study of historical records, rapidly-deposited sediments and lava flows. Although standard archaeomagnetic procedures will be followed during the course of the investigation, an important additional component will be detailed studies of the magnetic mineralogy and rock magnetic properties of various samples. These studies, which have never been done systematically for archaeomagnetic materials, will provide a firmer paleomagnetic basis for the measurements which we make and will provide new insights into the relative merits of different archaeological materials and archaeomagnetic techniques.