Small Grant for Exploratory Research - Paleomagnetic and Mineral Magnetic Studies in Anticipation of the Cape Roberts Project

探索性研究小额赠款 - 罗伯茨角项目预期的古地磁和矿磁研究

• 批准号: 9522309
• 负责人: Kenneth Verosub
• 金额: $ 3万
• 依托单位: University of California-Davis
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-06-01 至 1997-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9522309&HistoricalAwards=false
• 关键词: Small; Grant; Exploratory; Research; Paleomagnetic

Abstract This award supports a project to lay the groundwork for development of a reliable magnetostratigraphic record from drill core collected by the international Cape Roberts Project (CRP). A reliable chronostratigraphic framework is a prerequisite for proper interpretation of the climatic and tectonic events that are the focus of the CRP. Magnetostratigraphy could play a major role in development of that framework, but previous paleomagnetic studies of sedimentary sequences from Antarctica have shown that extracting a reliable magnetostratigraphy from the CRP cores may not be easy and that sophisticated treatment of samples may be necessary. This project will undertake paleomagnetic and mineral magnetic investigations of the lower part (Eocene and/or Oligocene) of the CIROS-1 core, which was collected in 1984/85 from western McMurdo Sound. In addition to useful information bearing on paleoenvironments that can be extracted from this core, this work provides an opportunity to gain paleomagnetic experience with the lithologies present in the Cape Roberts region and to address problems encountered in previous attempts to recover paleomagnetic records. This project will also utilize Cretaceous to Paleocene drill cuttings from the Great South Basin near New Zealand. The results of this work will allow determination of the most appropriate strategy for dealing with samples during the drilling and basic characterization phase of the CRP, when time and resources will be very limited. In this way, the efficiency of on site paleomagnetic investigations in support of the basic characterization work on the core should be greatly enhanced.

该奖项支持一个项目，该项目旨在为从国际罗伯茨角项目(CRP)收集的钻芯中开发可靠的磁性地层记录奠定基础。一个可靠的年代地层框架是正确解释气候和构造事件的先决条件，而气候和构造事件是中央气象局的重点。磁性地层学可以在这一框架的发展中发挥重要作用，但以前对南极洲沉积序列的古地磁学研究表明，从CRP岩心提取可靠的磁性地层学可能并不容易，可能需要对样品进行复杂的处理。该项目将对1984/85年在麦克默多海峡西部采集的Ciros-1岩心下部(始新世和/或渐新世)进行古地磁和矿物磁学调查。除了可以从该岩心提取的与古环境有关的有用信息外，这项工作还提供了一个机会，以获得关于罗伯茨角地区岩性的古地磁经验，并解决以前试图恢复古地磁记录时遇到的问题。该项目还将利用新西兰附近大南盆地白垩纪至古新世的钻井岩屑。这项工作的结果将使我们能够确定最适当的战略，以便在核心能力方案的钻探和基本表征阶段处理样品，因为这一阶段的时间和资源非常有限。这样，现场古地磁调查的效率将大大提高，以支持对岩心的基本表征工作。