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U.S.-France Cooperative Research: Geomagnetic Paleointen- sities and Secular Variation from Dated Holocene/Late Pleistocene Lavas

美法合作研究：全新世/晚更新世熔岩的地磁古强度和长期变化

基本信息

批准号：
9016187
负责人：
Shaul Levi
金额：
$ 1.44万
依托单位：
Oregon State University
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
1991
资助国家：
美国
起止时间：
1991-05-01 至 1994-10-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9016187&HistoricalAwards=false
关键词：
U.S.France Cooperative Research Geomagnetic

项目摘要

This award will support collaborative research in geophysics between Dr. Shaul Levi, University of Oregon and Dr. Norbert Bonhommet, University of Paris VI, France. These investigators have for the last few years cooperated in joint paleomagnetic research on dated Holocene/late Pleistocene lavas in the Massif Central, France. The primary objective of the research has been to obtain a complete vector characterization of the geomagnetic field for periods prior to the availability of archeomagnetic data by measuring paleointensities and paleodirections of the dated units. In this project, the investigators will continue this research and expand it to other geographical areas, such as, for example, La Reunion. High resolution description of the geomagnetic field requires accurate and well dated magnetic measurements. Knowledge of the geomagnetic field for times prior to direct observatory measurements comes from the study of remanent magnetism recorded in suitable dated rocks and archeological samples. In this project, the investigators propose to take advantage of the small but growing number of dated Holocene/late Pleistocene lavas to study the geomagnetic field well beyond the available archeomagnetic data. The major effort in this study will be to determine the paleointensities of the dated lavas of the Chaine des Puys and the Isle of Ischia. The results of this research will contribute to a better understanding and description of the complete geomagnetic vector for the Holocene/late Pleistocene period.

该奖项将支持物理学的合作研究俄勒冈州大学的Shaul Levi博士和法国巴黎第六大学诺伯特·邦霍梅。这些调查人员在过去几年里合作，全新世晚期古地磁联合研究法国中部地块的更新世熔岩。的研究的主要目的是获得一个地磁场全矢量表征在古地磁学出现之前数据通过测量古强度和古方向过时的单位。在这个项目中，研究人员将继续这项研究，并扩大到其他地理例如，在La Reunion。地磁场的高分辨率描述需要精确的和过时的磁性测量。对地球磁场的认识直接观测数据来自于在适当年代的岩石中记录的磁性，考古样本在这个项目中，研究人员建议利用数量虽少但不断增长的全新世/晚更新世熔岩，以研究地磁场远远超过了现有的古地磁场数据本研究的主要目的是确定 Chaine des的古老熔岩的古强度普伊斯和伊斯基亚岛。这项研究成果将有助于更好地理解和描述全新世/晚期完整的地磁矢量更新世时期。