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Conference Papers Year : 2015

Geological Uncertainty and Geophysical Ambiguity: Friends or Foes?

Abstract

We present two case studies of sensitivity analysis of 2.5D forward and 3D inverse potential field modelling at the scale of a volcano and of a tectonic belt. The results show that geophysical ambiguity and geological uncertainty can be used to reduce each other and knowledge can be derived from the residual field (differences between observed and calculated fields) utilising the variability allowed by potential field ambiguity. Recent research on geological uncertainty shows that a better sampling of the geological model space is possible. Although still a manual procedure, sampling the geophysical model space is also possible. The combination of both allows for building a more consistent suite of 3D geological models that are consistent with both the geological input data and the geophysical response of the terrane modelled.
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Dates and versions

hal-04066177 , version 1 (12-04-2023)

Identifiers

  • HAL Id : hal-04066177 , version 1

Cite

Laurent Ailleres, Robin Armit, Teagan Blaike, Thomas Carmichael, Lachlan Grose, et al.. Geological Uncertainty and Geophysical Ambiguity: Friends or Foes?. 13th Biennal SGA meeting, SGA, 2015, Nancy, France. pp.1693-1696. ⟨hal-04066177⟩
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