Details of the Abstract
| Title of paper | An Augmented Finite Volume Formulation for Simulating TDEM Responses From Highly Conductive Plate-Like Targets |
| List of authors | Cowan, D. C., Heagy, L. J., and Oldenburg, D. W. |
| Affiliation(s) | University of British Columbia Geophysical Inversion Facility |
| Summary | Inductive source time-domain electromagnetic (TDEM) methods are frequently used to image ore-bearing mineralizations that present as thin and highly conductive (>1000 S/m). The need to properly characterize inductive responses from thin, highly conductive targets in geologically complex areas has promoted significant interest in developing improved numerical algorithms. Here, we present an augmented mimetic finite volume formulation that accurately models the physics while limiting the computational resources required. We accomplish this by defining the electrical properties of plate-like structures as conductances that live on voxel faces. The formulation is implemented using the SimPEG framework. The formulation shows excellent agreement when validated against the semi-analytic 1D solution for a thin horizontal layer within a halfspace. Additionally, the formulation is capable of simulating the expected TDEM responses for a near-perfect conductor buried within a halfspace. Future work will be aimed at validating the augmented formulation for problem geometries of increasing complexity. |
| Session Keyword | 2.0 EM theory, modelling and Inversion |
| File upload |
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