Technical Papers - Airborne Electromagnetics

Conductivity-Depth Transform of GEOTEM Data

Peter Wolfgram, Fugro Airborne Surveys, Australia
Gulcin Karlik, Universitaet zu Koeln, Inst. f. Geophysik and Meteorologie
Albertus Magnus-Platz, 50923 Koeln, Germany

Abstract

A conductivity-depth transform (CDT) of airborne transient electromagnetic (EM) data generates approximate sections and maps of the subsurface electrical conductivity variations. The resulting products have instrumentation parameters such as the transmitter waveform removed and can be directly integrated with other information from the survey area. Although approximate, the conductivity depth transform has a number of advantages over an exact inversion method. These are illustrated with two examples: a groundwater salinity study in Australia and a survey over the Bushman mineral deposit in Botswana.

Published in Exploration Geophysics, 1995, volume 26, pages 179-185 and discussion on page 549. 

No pdf file for this paper is available for download.

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