Modelling Magnetic Fabrics from Mineral Texture
Magnetic fabrics in rocks can be modelled based on their modal composition, the orientation density of all constituent minerals, and their single crystal properties. These models help understand complex magnetic fabrics, in particular when several minerals contribute, and their contributions may add up or cancel each other out. Magnetic fabric predictions based on simplified model textures further increase our understanding of the origin of measured magnetic fabrics. Hence, magnetic fabrics simulations can be used to infer mineral textures from magnetic anisotropy in a more robust and quantitative way.
Simulations of the expected magnetic fabric based on mixtures of three simplified texture types of amphiboles, a-fiber, point distribution and c-fiber textures. The magnetic properties of the crystals, together with their alignment, define the magnetic anisotropy in rocks.
Collaborations: A.R. Biedermann & A.M. Hirt; K. Kunze (Scope-M, ETH Zurich); A.S. Zappone (D-ERDW, ETH Zurich)
- A.R. Biedermann, K. Kunze, A.M. Hirt, Interpreting magnetic fabrics in amphibole-bearing rocks, Tectonophysics, 722, 566-576, doi: 10.1016/j.tecto.2017.11.033, 2018