A magnetotelluric investigation of the structural geology beneath Charlevoix Crater, Quebec |
| |
| Authors: | Marianne Mareschal and Michel Chouteau |
| |
| Institution: | IREM and Genie Mineral, Ecole Polytechnique, CP 6079, Succ. “A”, Montreal H3C 3A7, Canada |
| |
| Abstract: | The results of ten tensor magnetotelluric soundings recorded within the Charlevoix crater are presented. The geological complexity of the region (the crater is located at the junction of two major geological provinces, i.e. the crystalline basement of the Canadian shield and the more conductive sediments of the Appalachian system) and the amount of cultural noise present in our data prevent a highly definitive interpretation of the shallow structure. A subhorizontal conductive fault related to Rondot's (1971) structural sketch of the original impact structure may exist within the upper 5 km, but it is not completely constrained by the data. Pseudo 3D modelling using stacked thin sheets indicates that superficial patches of high conductivity may explain the large anisotropy observed at the long periods and suggests that our deeper structures fit well with the 2D model previously proposed by Kurtz (1982) for the region. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
