X-Ray micro-tomography based modelling of anisotropy of magnetic susceptibility
| Autor: | Machek, M., Kusbach, V., Roxerová, Z., Vávrová, A. |
|---|---|
| Rok vydání: | 2023 |
| Zdroj: | XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) |
| DOI: | 10.57757/iugg23-0299 |
| Popis: | Assessing rock fabric via the anisotropy of magnetic properties is a fast, cheap, and popular method in structural geology. Magnetic fabric is a sensitive recorder of rock deformation and flow in rocks. These processes however often give origin to distinctive individual subfabrics making the anisotropy of magnetic susceptibility (AMS) challenging to interpret. Numerical modelling of magnetic fabric based on rock microstructure becomes the most effective way for AMS interpretation in complex rock systems. Progress in microstructure 3D imaging allows to explore different approaches of modelling of anisotropy of magnetic susceptibility. Shear zone analogue experiments using plaster of Paris revealed that essential factors for interpretation of magnetic fabric in deformation zones are localization and partitioning of deformation (Roxerová et al., 2023). The X-Ray micro-tomography data from across analogue shear zone serves as basis for the testing of various approaches of modelling of AMS based on the shape preferred orientation of distinct recorded phases. The modelled results based on magnetite, pores and β-hemihydrate relics are confronted with the measured AMS. With this study, we explore the potential of the microstructure-based modelling for the magnetic fabric interpretation and inverse evaluation of unknown rock texture.Roxerová, Z., Machek, M., Kusbach, V. K., & Vávrová, A. (2023). Strain localization: Analog modeling and anisotropy of magnetic susceptibility. Geochemistry, Geophysics, Geosystems, 24, e2022GC010630. https://doi.org/10.1029/2022GC010630 The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|