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  • 23 - Crustal-Scale Stress Modelling to Investigate Glacially Triggered Faulting

  • from Part VI - Modelling of Glacially Induced Faults and Stress
  • Edited by Holger Steffen, Odleiv Olesen, Raimo Sutinen
  • Book:
    Glacially-Triggered Faulting
    Published online:
    02 December 2021
    Print publication:
    16 December 2021, pp 402-416

  • Summary

    Modelling of stresses that influence glacially triggered faulting has progressed substantially in the last decades with more complex models and improved modelling techniques, incorporation of a variety of relevant processes, better constraints of ice-loading history, higher model resolution and 3D geometries. Some recent developments are collected in this section to portray the scope and variability of numerical modelling relevant to glacially triggered faulting. These range from modelling of the general in situ stress field to studies on the stress field induced by glacial loading and unloading.

    An appropriate estimation of the ambient background stress field is crucial for determining the effect of additional ice loading (or unloading) on pre-stressed faults. Contributions from local and far-field stress sources (topography, tectonics) need to be reconciled with in situ measurements from boreholes and fault-plane solutions from earthquakes. We describe the different types of stresses in glaciated regions with a focus on Scandinavia together with the techniques used to incorporate stresses into numerical models.