Late Quaternary Paleomagnetic Intensities and Secular Variation from Dated Lavas In Southern Europe

南欧定年熔岩的晚第四纪古地磁强度和长期变化

• 批准号: 8816721
• 负责人: Shaul Levi
• 金额: $ 12.34万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-04-01 至 1991-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8816721&HistoricalAwards=false
• 关键词: Late; Quaternary; Paleomagnetic; Intensities; Secular

The geomagnetic intensity is probably the least well known parameter of the paleomagnetic field, prior to the appearance of baked archeological artifacts about 10 ka B.P. (ka = thousand years; B.P. = before present). This award supports studies of the paleomagnetic intensities and secular variation during the past 90 millennia, recorded in more than 50 dated lavas of the Massif Central, Auvergne, France, and similar studies of dated flows from Italy, whose ages extend to about 130 ka B.P. The study will contribute to the vector description of the late Quaternary geomagnetic field, extending significantly the archeomagnetic record of paleomagnetic intensities an directions in southern Europe to about 130 ka B.P. Such data are needed for a more complete description of the field and for a more thorough understanding of the geodynamo processes responsible for its existence.

地磁强度可能是最不为人所知的古地磁场参数，距今约10ka B.P.(Ka=千年；B.P.=现在)。该奖项支持对过去90 000年来古地磁强度和长期变化的研究，这些研究记录在法国奥弗涅中央地块的50多个测年熔岩中，以及对来自意大利的测年流的类似研究，其年龄延伸到约130ka B.P.。这项研究将有助于对第四纪晚期地磁场的矢量描述，将南欧地区古地磁强度和方向的古地磁记录显著扩展到约130ka B.P.。需要这样的数据才能更完整地描述该磁场，并更彻底地了解导致该磁场存在的地球发电机过程。