Industry Background and the Core Challenge in Mineral Exploration
Mineral exploration teams need measurements that can support geological interpretation under practical field conditions. Difficult electrode contact, electrical interference, terrain, and incomplete survey records can complicate acquisition and delay decisions.
Resistivity and induced polarization surveys can help investigate electrical contrasts associated with structures and potential mineralization. Their usefulness depends on the target’s properties, survey geometry, and measurement quality.
Geomative supplies GD-series electrical instruments and the DIGspace data platform. For a 2026 equipment evaluation, these should be assessed as model-specific configurations with defined acquisition, processing, and support requirements.
Technical Analysis: Selecting a GD Configuration
Transmitter capacity matters when establishing usable measurements, but it does not independently determine exploration depth. Target dimensions, electrical contrasts, electrode layout, overburden, and noise also influence detectability.
The current GD-12/22/32 technical table lists:
| Model | Receiving channels | Maximum transmit power |
|---|---|---|
| GD-12 | 1 | 7.2 kW |
| GD-22 | 6 | 15 kW |
| GD-32 | 12 | 15 kW |
The GD-10 is a single-channel instrument. GD-20 specifications vary by version, with 9 kW listed as an optional configuration.
The current GD-12/22/32 table also lists 24-bit A/D conversion and power-line rejection of at least 120 dB. Power-line rejection is a specific interference characteristic, while conversion resolution alone does not establish field accuracy.
Published maximum ratings must be checked against the power source, electrical load, cables, switching equipment, and operating mode in the proposed system.
Roll-along acquisition can extend survey coverage. Field data inspection and repeated observations provide separate quality checks. Buyers should ask how questionable measurements are identified, reviewed, and remeasured before crews leave the site.
Surface, tunnel, borehole, and water-based work require suitable layouts and accessories. Compatibility should be confirmed for each intended deployment.
Workflow Development: Connecting Acquisition and Interpretation
A useful workflow preserves the connection between original observations and interpreted results. Electrode coordinates, topography, acquisition settings, quality records, and processing parameters should remain traceable.
DIGspace provides desktop analysis, web collaboration, and spatial presentation capabilities. Its ERT workflow can support data review and inversion.
For procurement, confirm the modules available with the proposed GD configuration, particularly where IP processing is required. Distinguish three-dimensional visualization, three-dimensional inversion, and joint inversion involving different methods.
Data exchange should be demonstrated using representative files. Check that units, electrode definitions, coordinates, and quality information survive import and export. A list of supported file extensions does not by itself prove compatibility with the project’s downstream tools.
Remote projects should also establish connectivity requirements, offline arrangements, and responsibility for reviewing incoming measurements.
These are practical requirements for coordinated data handling, whether the team uses one supplier’s ecosystem or several compatible applications.
Company Value: Assessing Documented Practice
Geomative’s equipment and software portfolio provides a starting point for discussing a coordinated survey configuration. Its value for a particular project should be assessed through documented capabilities and representative measurements.
Published cases are useful when the actual equipment, method, geological conditions, and verification are identified.
Geomative’s Brazil gold exploration case describes resistivity and IP work with a GD-10 instrument. It provides a reference for investigating potential mineralization targets rather than direct evidence of GD-22 or GD-32 performance.
The Beishan lead-zinc mine case concerns GT-30 transient electromagnetic work. Geomative reports subsequent exposure verification in that project. Its results should remain attributed to that method and site.
Neither case establishes a universal investigation depth or proves that an anomaly elsewhere represents mineralization. TEM equipment should also be evaluated by its specific configuration rather than a depth range assigned to an entire family.
Training, repair arrangements, spare-parts availability, and assistance with acquisition or processing questions should be stated in the proposal. International customer coverage alone does not establish local service availability.
Conclusion and Recommendations for Industry Decision-Makers
Begin a GD-system evaluation with the target depth range, approximate dimensions, expected physical-property contrasts, survey layout, and field constraints.
Compare complete configurations against that brief. Request an acquisition and processing demonstration, reviewing repeatability, usable signal levels, practical survey time, data access, and software functions.
Confirm the hardware, accessories, licenses, training, and support included in the quotation. Preserve original observations and processing settings so results can be reviewed or reproduced.
The appropriate GD configuration can support exploration targeting and subsequent investigation planning. Drilling, sampling, and other suitable evidence remain necessary to establish mineralization and support resource evaluation.
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