Investigations of the Structure of the Inner Core and the Core-Mantle Boundary

内核结构和核幔边界研究

• 批准号: 9119050
• 负责人: Kenneth Creager
• 金额: $ 10.23万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-04-01 至 1995-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9119050&HistoricalAwards=false
• 关键词: Investigations; Structure; Inner; Core; Mantle

This research is to utilize digitized core phases PKP generated by earthquakes to study the inner core where some evidence of anisotropy has been found, and the core-mantle boundary where heterogeneity is known but poorly resolved. Data are extracted from CD-ROMS distributed by the National Earthquake Information Center and from the IRIS data center. In order to remove effects of mantle hetereogeneities and earthquake source mislocations, the research will utilize differential measurements between phases with similar paths in the mantle. Both amplitudes and times will be used to analyze inner core structure along the earth's spin axis. The results will be used to constrain theories of anisotropy and heterogeneity in the inner core and core-mantle boundary regions.

本研究是利用数字化岩心相位PKP生成 来研究内核， 各向异性已被发现，和核幔边界， 异质性是已知的，但解决得很差。 数据提取 来自国家地震信息局分发的光盘 中心和IRIS数据中心。 为了消除影响 地幔的不均匀性和震源错位， 该研究将利用差分测量， 在地幔中具有相似路径的阶段。 振幅和 时间将用于分析内核结构沿着 地球自转轴 结果将用于约束 内核的各向异性和非均匀性理论， 核幔边界区