Uranium mineralization in the prolific Athabasca Basin is found at or near the unconformity between overlying sediments and the basement units, and are also found at or near fault structures that cut through the basement and into the basin sediments. EM methods are often used to detect graphite in these fault structures that may be associated with uranium mineralization. The electrical resistivity method is effective in mapping the alteration in the overlying sediments that often accompanies the mineralizing process. Current exploration in the basin ranges from surface to many hundreds of metres, and at these depths traditional methods of exploration are challenged. The electrical resistivity method can effectively search to depths of 800 m and more.
Flexibility and Scalability
The DIAS32 system provides total flexibility in survey design and can be deployed to achieved virtually any survey resolution. The DIAS32 system is not constrained by set cable lengths, so it can survey using custom inter-electrode spacings – even a 126.3 m spacing. In this way, the survey resolution can be tuned to precisely match the target depth in the survey area. And if the target depth varies across the survey area, the inter-electrode spacing can be easily adjusted for each line.
High Data Volume
Where the target depth is great, the resolution and accuracy of traditional resistivity methods is challenged. The 3D resistivity survey approach provides a data-rich survey product that significantly improves the accuracy and resolution of model images to great depth. 3D surveys produce 5 to 20 times the data volume than traditional methods.
The DIAS32 system is normally deployed in multi-pole mode, which delivers both pole-dipole and pole-pole data sets. The addition of the pole-pole resistivity data set provides enhanced depth sensitivity and can be jointly inverted with the pole-dipole data set for more accurate imaging at depth.
The DIAS32 system is light and portable, so full linecutting is not required for most survey areas. Simple brushing out of the lines is normally sufficient. This can significantly reduce the overall cost of a survey.
By minimizing the amount of wire required for surveying, a DIAS32 survey also minimizes leakage, EM coupling, and other noise sources associated with emplacement of wire through the survey area.
Dias has developed a unique system for surveying across lakes. We deploy our receivers in waterproof floats that are tethered to the reference wire. GPS recording ensures that we know the exact location of each electrode, even when strong winds deflect the receivers from their idealized positions.
An efficient fully-distributed array survey that yields multi-pole data will provide for accurate resistivity images of the subsurface to great depth. We recommend that a 3D array will produce a more robust and accurate final model image to provide greater confidence in drill targeting.
Having completed over 200 line-km of resistivity and IP surveying in the Athabasca basin, Dias has the experience to deliver an efficient and effective program. Flexibility, scalability, safety, and more accessible 3D acquisition make the DIAS32 solution a game-changer in the basin.
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 has been operating in Australia for over 6 months, and has committed a full 3D system to the Australian market for the foreseeableREAD MORE
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Please join Dias Geophysical in the exhibition hall at the DMEC conference from October 22 to 25, 2017. Dias will be sharing a booth withREAD 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