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

9725556 Care这个项目的目标是描述太古代克拉通的电磁特征，特别是加拿大奴隶克拉通南部和中部的根。这项研究的结果将与正在进行的宽带大地电磁、反射地震、被动地震和加拿大岩石探测样带SNORCLE的相关地质研究相结合，以帮助更好地了解克拉通深根的性质和起源。已证实的海洋大地电磁技术安装在太古界奴隶省战略位置的湖泊中，将用于对克拉通根部结构进行非常深的大地电磁探测。将获得有关根部电学深度范围、其结构的任何横向变化以及其深层电学各向异性的信息。这些结果与SNORCLE的结果相结合，将有助于解决关于最古老的克拉通之下的深部地壳和地幔的结构和组成的问题，并有助于理解太古代克拉通在过去4Ga以来是如何被改造的。此外，关于大陆岩石圈形成的各种假说也可以用所收集的数据进行检验。***

9725556 Chave 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. ***