Technical Papers - Airborne Electromagnetics

The Use of B-Field Measurement in an Airborne Time-Domain System:
Part II - Examples in Conductive Regimes

Peter Wolfgram and Stephen Thomson, Fugro Airborne Surveys, Australia.

Abstract

Explorationists are increasingly concerned with finding more difficult targets such as those under cover. Significant developments in airborne electromagnetic (AEM) technology are now providing advances tools for exploration in these scenarios. Recovering the magnetic field B rather than dB/dt from a towed bird sensor boosts the response from a high conductance target, as is readily shown with model calculations. The advantage of B-field data in the presence of noise is demonstrated with a GEOTEM_DEEP^TM field example over a known conductive body that is covered by a thick conductive sequence and is difficult to detect from dB/dt data alone. 

Abstract of a paper published in Exploration Geophysics, 1998, Volume 29, pages 225-229. For more information on this and other ASEG publications, see http://www.aseg.org.au/

No pdf file for this paper is available for download.

Requests for a paper copy can be made to rsmith@fugroairborne.com or pwolfgram@fugroairborne.com.au .

See also Part I of this paper.