Journal: Scientific Reports

Article Title: Evaluation of grain boundaries as percolation pathways in quartz-rich continental crust using Atomic Force Microscopy

doi: 10.1038/s41598-021-89250-z

Figure Lengend Snippet: Kernel Average Misorientation maps of four representative quartzite samples used in this study, generated using the software package Mtex version 5.6.0 for Matlab. (Matlab version 2020a). URL: https://mtex-toolbox.github.io/ . Varying shades of red describe the misorientation angle at different points in the map; ( A ) RN 178: sheared quartzite from the Rengali Province. Larger grains have a significantly higher amount of strain (dislocations) compared to smaller grains, as is expected for incomplete dynamic recrystallization. In some grains, dislocations are perpendicular to the grain boundary lengths. ( B ) RN 221: sheared quartzite from the Rengali Province. Comparatively larger grain size compared to A, because of which the density of dislocations is higher. Smaller grains are almost dislocation free whereas large grains have dense concentrations of dislocations within them. ( C ) RN 36: statically recrystallized quartzite from the Rengali Province. Almost strain free, with very few isolated dislocations in the grain interiors. Static recrystallization and accompanying polygonization without further strain imprint appears to have left this quartzite relatively strain free. ( D ) RN 235: quartzite deformed under granulite facies conditions. Large amoeboid grains with a significant dislocation density are the dominant feature of this quartzite. Smaller recrystallized grains appear to be relatively strain free.

Article Snippet: Figure 4 Kernel Average Misorientation maps of four representative quartzite samples used in this study, generated using the software package Mtex version 5.6.0 for Matlab. (Matlab version 2020a).

Techniques: Generated, Software, Recrystallization, Isolation