Localization effect on AMS fabric revealed by microstructural evidence across small-scale shear zone in marble.

ABSTRACT: Anisotropy of magnetic susceptibility (AMS) is regularly applied as a tool to infer structural analysis of deformation and flow in rocks, particularly, with low anisotropy. AMS integrates the magnetic signature of crystallographic and shape preferred orientation of all mineral grains present in the rock microstructure. Those preferred orientations result from multiple processes affecting the rock during its evolution, therefore the desirable AMS-strain relationship is not straightforward. Here we show that due to localization of deformation, AMS is indirectly dependent on the magnitude and character of deformation. In order to decipher the AMS-strain relationship, AMS studies should be accompanied by microstructural analyses combined with numerical modelling of magnetic fabric. A small-sca

SUBMITTER: Kusbach VK 

PROVIDER: S-EPMC6877632 | biostudies-literature | 2019 Nov

REPOSITORIES: biostudies-literature