Collaborative Research: Deep EM Studies of the Oldest Achean Craton: A Contribution to the SNORCLE Transect

合作研究：最古老的亚齐亚克拉通的深层电磁研究：对 SNORCLE 断面的贡献

• 批准号: 9725864
• 负责人: Jean Filloux
• 金额: $ 12.4万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-05-01 至 2001-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9725864&HistoricalAwards=false
• 关键词: Collaborative; Research; Deep; EM; Studies

9725864 Filloux The goal of this project is to characterize electromagnetically Archaean cratonic roots, specifically the root of the southern and central portion of the Slave craton in Canada. The results of this study will be combined with ongoing broadband magnetotelluric, reflection seismic, passive seismic and related geological studies of the Canadian Lithoprobe Transect SNORCLE to help improve understanding of the nature and origin of deep cratonic roots. Proven oceanic magnetotelluric technology installed in strategically located lakes on the Archaean Slave province will be used to conduct very deep magnetotelluric probing of cratonic root structure. Information on the depth extent of the root electrically, any lateral variation in its structure, and its deep electrical anisotropy will be obtained. These results combined with those from SNORCLE will help address questions on the structure and composition of the deep crust and mantle beneath the oldest craton and are relevant to the understanding of how Archaean cratons have been modified over the past 4 Ga. In addition, various hypotheses on the formation of continental lithosphere in general can be tested with the data to be collected. ***

小行星9725864 该项目的目标是电磁表征的Escherichian的Escherichian根，特别是在加拿大的奴隶克拉通南部和中部的根。 这项研究的结果将结合正在进行的宽带大地电磁，反射地震，被动地震和加拿大Lithoprobe断面SNORCLE的相关地质研究，以帮助提高对深岩根的性质和起源的理解。 在太古代奴隶省战略位置的湖泊中安装的经过验证的海洋大地电磁技术将用于对克拉通根结构进行非常深的大地电磁探测。 将获得关于根部电深度范围、其结构中的任何横向变化及其深部电各向异性的信息。 这些结果与SNORCLE的结果相结合，将有助于解决最古老的克拉通下的深部地壳和地幔的结构和组成的问题，并与了解在过去的4 Ga中如何修改了古克拉通有关。 此外，关于大陆岩石圈形成的各种假说一般都可以用收集到的数据来检验。 ***