Some remarks on fabric overprints and constrictional AMS fabrics in igneous rocks

Abstract

During the ascent, emplacement and postemplacement deformation of igneous rocks, two or more phases of deformation that overprint each other are often depicted. These overprints, when magnetic minerals are present, are recorded in magnetic fabric.

In this contribution, overprints are studied by means of numerical modeling, following several basic scenarios common to igneous rocks.

Keywords

• Anisotropy of magnetic susceptibility
• Numerical modeling
• Magmatic overprints
• Magma emplacement fabrics