RUI: Geomagnetic Paleointensity During the Kauai N-R Polarity Transition

[9305261]博格这个项目的目标是记录大约400万年前发生的正反极性（N-R）转变期间古代地磁场强度的变化。来自夏威夷考艾岛的28个叠加玄武岩熔岩流的现有样本收集提供了这种逆转的古地磁记录。这些样品的古强度将使用经典双加热实验的改进版本来确定。最后，本研究将继续通过对实验室中可能发生严重热蚀变的样品进行字母识别来提高古强度实验的效率。研究将集中在低温退磁，无论是在初步的岩石磁性实验和古强度实验本身。本科生将在本研究中发挥核心作用。＊＊＊

9305261 Bogue The goal of this project is to document the variation of the ancient geomagnetic field intensity during a normal-to-reverse (N-R) polarity transition that occurred approximately 4 million years ago. An existing sample collection from 28 superposed basaltic lava flows from the Hawaiian island of Kauai provides a paleomagnetic record of this reversal. Paleointensities of these samples will be determined using a modified version of the classic double-heating experiment. Finally, this study will continue an ongoing effort to improve the efficiency of the paleointensity experiment by letter identifying samples that are likely to undergo serious thermal alteration in the lab. Research will focus on low-temperature demagnetization, both in preliminary rock magnetic experiments and during the paleointensity experiment itself. Undergraduate students will play a central role in this research. ***