Summary
A known mineralized zone was successfully mapped in high resolution with the Orion 3D omnidirectional 3D DCIP system. Subsets of the original dataset are used to examine the resolution and mapping capabilities of other approaches to 3D DCIP acquisition. The results show that the high-density omnidirectional method produces superior resolution of geologic structures compared to other methods that collect less dense and directionally biased data.
Introduction
In recent years, DCIP acquisition has evolved from a purely 2-D method to a variety of systems offering differing levels of three-dimensional acquisition. Offset-injection systems acquire data on multiple parallel receiver lines, with or without orthogonal receiver dipoles. The Orion 3D pole-dipole system, however, uses a network of orthogonal dipoles and a large number of current injections to collect high-density omnidirectional DCIP data throughout the survey area.
To examine the resolution of the high-density omnidirectional approach to 3D DCIP acquisition, we examine the inversion results from an Orion 3D survey that was used to successfully map a known mineralized zone with a high degree of precision.
Subsets of the full dataset have been inverted to evaluate the effectiveness and mapping resolution of lower density methods of data acquisition, including those with unidirectional receiver dipoles, directionally oriented current injection patterns, and roll-along type offset injection surveys.
