Specifications

University of Pretoria etd – Combrinck, M (2006)
Figure 5-2: Grid locality and layout.
5.2.2 Objective
Based on the TDEM and other investigations (including geochemical and structural
geological interpretations) some exploration boreholes were drilled and follow-up
borehole TDEM surveys were done. This chapter is not intended to be a discussion of
the exploration program or to propose a geological model for the area. The TDEM data
acquired during this project are used to illustrate the performance of the S-layer
differential transform under extremely challenging geological and topographical
conditions.
5.2.3 Application of S-layer differential transform
The main challenge of applying an automated processing sequence to field data is noise.
Even though system parameters can be chosen (McNeill, 1995) to optimise the signal to
noise ratio, there will always be some stations in a large data set not conforming to the
ideal TDEM decay behaviour. This can be due to random atmospheric noise, cultural
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