Paleomagnetic Studies of Transitional Field Behavior with Emphasis on the Comparison of Different Types of Recordings

过渡场行为的古地磁研究，重点是不同类型记录的比较

• 批准号: 8708524
• 负责人: Kenneth Hoffman
• 金额: $ 11.73万
• 依托单位: California Polytechnic State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-06-15 至 1991-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8708524&HistoricalAwards=false
• 关键词: Paleomagnetic; Studies; Transitional; Field; Behavior

Paleomagnetic observations of transitional field behavior come from a wide varkety of igneous and sedimentary structures. Yet it may be that no one rock type possesses the capabilities to render ideaÕ recordings, both in terms of vector field changes as well as temporal accuracy. Indeed, each type of recording appears to have its own set of advantages as well as limitations. The two studies planned promise not only to shed light on the geomagnetic reversal process, but also to enhance our knowledge regarding the relationship between record fidelity and rock type. The first project, presently ongoing, involves the attainment of the polarity transition corresponding to the termination of the Olduvai normal polarity event from lavas on Moloka, Hawaii. The derived record, when complete, will be rigorously compared to a published record of the same transition obtained from nearby deep-sea sediments. The second project involves the attainment of detailed paleofield behavior of sequential reversals recorded in exposed, rapidly-deposited marine sediments along the Mangapoike River on New Zealand's North Island. The sequence has been well-correlated to the late Miocene. Akaroa Volcano, on New Zealand's South Island - the previous focus of transitional field studies by this P.I. - appears to have been created contemporaneously with the marine sediments. This situation provides a rare opportunity to compare transition records derived from two paleomagnetically distinct, yet desirable rock types. As has been the case with past paleomagnetic projects at Cal Poly, several undergraduates will take part throughout the proposed projects, from assistance in the field to laboratory analysis. Some will undertake an aspect of the original research as their own and produce a senior project.

古地磁观测的过渡场行为来 形成了巨大的火成岩和沉积构造 然而 可能没有一种岩石具有 渲染ideaa-mechanical记录，无论是在矢量场的变化方面， 以及时间精度。 事实上，每种类型的记录 似乎有其自身的优点和局限性。 这两项研究计划不仅有望揭示 地磁反转过程，也提高了我们对 关于唱片保真度和摇滚乐之间的关系 类型. 目前正在进行的第一个项目涉及 达到对应于 奥杜威正极性事件的终止 莫洛卡，夏威夷。 完成后，派生记录将是 严格地与同一过渡时期的公开记录进行比较， 是从附近的深海沉积物中提取的。 第二个项目 包括获得详细的古油田行为， 连续的反转记录在暴露的，快速沉积的 海洋沉积物沿着曼加波伊克河， 北岛。 该序列与晚期 中新世 位于新西兰南岛的阿卡罗阿火山 这位私人侦探之前的过渡领域研究重点- 似乎是与海军陆战队同时期创建的 沉积物 这种情况提供了一个难得的机会， 比较两个古地磁学的过渡记录 独特而又理想的岩石类型。 就像 在加州理工学院的古地磁项目中， 将参与整个拟议的项目，从援助 到实验室分析。 有些人将承担一个 把自己的原创研究作为一个方面， 高级项目