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

RUI：考艾岛 N-R 极性转变期间的地磁古强度

• 批准号: 9305261
• 负责人: Scott Bogue
• 金额: $ 7.43万
• 依托单位: Occidental College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-08-01 至 1997-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9305261&HistoricalAwards=false
• 关键词: RUI; Geomagnetic; Paleointensity; During; Kauai

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. ***

小行星9305261 这个项目的目标是记录古地磁场强度在正常到反转期间的变化。 (N-R)发生在大约400万年前的两极转换。 从夏威夷考艾岛的28个叠加玄武岩熔岩流中收集的现有样本提供了这种逆转的古地磁记录。 这些样品的古强度将使用修改后的 经典的双重加热实验 最后，这项研究将继续进行一项正在进行的努力，以提高效率的paleointensity实验的字母识别样品，可能会发生严重的热蚀变在实验室。 研究将侧重于低温退磁，无论是在初步的岩石磁性实验，并在古强度实验本身。 本科生将在这项研究中发挥核心作用。 ***