Mt. Isa

• Authors: Dom Fournier, Dr. Kris Davis

• Editor: Douglas Oldenburg

Prelude

This case history follows the inversion of DC/IP data to delineate ore-bearing rock units at Mt. Isa, Queensland, Australia.

Special Thanks

Thanks to CSIRO publishing for permission to reproduce figures and adapt text from the source material. This Case History is based upon the paper: 2-D and 3-D IP/resistivity for the interpretation of Isa-style targets by Rutley, Oldenburg and Shekhtman [ROS01].

Abstract

Here, we show one of the first examples of inverting DC/IP field data to recover 3D distributions of resistivity and chargeability. Prior to this, the inversion of field data was primarily carried out in 2D. We use this case history to provide an example for inverting DCR and IP data and to link different parts of the survey and processing to the fundamentals of EM as presented in EM.geosci. We have re-inverted the data but have kept as many details as possible to be the same as in the original paper. This enables us to show how current technology has increased the ability to recover details about the subsurface.

• Setup
• Properties
• Survey
• Data
• Processing
• Interpretation
• Synthesis
• Lessons worth highlighting