Micromechanical modeling of healed crack orientations as a paleostress indicator: application to Precambrian granite from Illinois and Wisconsin

초록

Uses a micromechanical, four-grain model to simulate intragranular cracks produced during primary cooling of a granitic pluton in a horizontally anisotropic stress field. The model results are applied to new and previous data on Precambrian granites from Wisconsin and Illinois. We concluded that healed crack orientations are useful indicators of the paleostress field and that they may be used as a tool for orienting core in stable, structurally simple regions. -from Authors