In potash mining, the tailings need to be contained to prevent interaction with groundwater. This containment requires an accurate and detailed understanding of groundwater movement controls throughout the tailings management area (TMA).
The resistivity parameter is able to map aquifers and aquitards, so 3D resistivity imaging can be an effective tool for characterising the subsurface without extensive drilling. TMA assessment is a costly and time-consuming process. Drilling, the principal technology currently used for this process, yields accurate and relevant information at each hole location, but there can remain significant uncertainty between the holes. In addition, the drillhole itself can compromise the effectiveness of impermeable layers if these layers are completely penetrated and not adequately cemented after drilling.
A high resolution 3D resistivity image from surface to approximately 100 m depth with high resolution information in the near surface. The method can provide continuous imaging of the subsurface without disturbing the ground. This resistivity data set along with a relatively small number of drill holes can provide an accurate and continuous image of the subsurface at a much lower overall project cost and in a much shorter period of time.
Dias carried out forward modeling and a pilot survey designed to characterise the effectiveness of the resistivity method and determine optimal parameters for acquisition and modeling. High density data from 2 orthogonal 2D survey lines provided the confidence in the approach and confirmed the required survey parameters for a full 3D survey. The results of the pilot survey confirmed a strong correlation with the existing borehole physical property data, and supplied confidence to the technical and management teams in moving forward with a full 3D resistivity survey.
Dias delivers ground geophysical solutions to geoscience challenges through the application of innovative resistivity and induced polarization technology. Dias has developed uniquely efficient and effective DCIP systems with integrated safety.
Dias Geophysical is pleased to announce the completion of a 3D resistivity and IP survey over the Arrow deposit in the southwest Athabasca basin, Saskatchewan,READ MORE
Dias Geophysical has successfully completed an induced polarization and resistivity survey in northern Chile. The project was successful in identifying prospective targets for drill follow-upREAD MORE
Dias expands capacity by adding a second DIAS32 system. Like the first, this new system will allow for fully-distributed 2D acquisition.READ MORE
Dias completes a significant 2D DIAS32 project from April to June, 2015, in the northwestern USA. Dias is pleased with the performance of the systemREAD MORE
Dias Geophysical is exhibiting at the PDAC Conference from March 5 to 8. Please visit our booth # 6210N in the North Convention area.READ MORE
Stop by the Dias Geophysical booth at the ASEG conference in Perth, Australia.READ MORE
Join Dias Geophysical at our booth at the AMEBC Roundup conference in Vancouver.READ MORE
Dias presents an overview of the DIAS32 system at the KEGS monthly meeting in Toronto.READ MORE