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Industry Background and the Problem of Deep Mineral Deposit Localization

Deep mineral exploration requires measurements that can help distinguish geological targets from their surroundings. Difficult electrode contact, electrical interference, terrain, and limited access can complicate acquisition and delay interpretation.

For gold or lead-zinc exploration, resistivity and induced polarization surveys may help investigate structures or mineralization-related contrasts. Their usefulness depends on the target’s physical properties, dimensions, depth, and geological setting.

Geomative’s GD-22 resistivity and IP system provides an equipment option for these investigations. Its suitability should be assessed through a project-specific configuration and representative field measurements.

Technical Analysis: The Logic Behind GD-22

The current GD-22 technical table lists:

Parameter	Published specification
Receiving channels	6
Maximum transmit power	15 kW
Maximum transmit voltage	1,500 V
Maximum transmit current	10 A
A/D conversion	24-bit
Power-line rejection	≥120 dB, selectable 50/60 Hz
Full-waveform acquisition	Supported

These specifications describe instrument capabilities. The operating limits of the complete supplied system also depend on its power source, cables, switching equipment, and measurement mode.

Transmitter capacity can help establish usable measurements under suitable conditions, but it does not independently determine exploration depth. Target contrast, survey geometry, ground conditions, and noise must also be considered.

Power-line rejection is a specific interference characteristic. Field testing should examine measurement repeatability and usable signal levels with the intended acquisition settings.

Roll-along acquisition supports extended coverage. Data inspection and waveform review serve a separate quality-control role, helping crews investigate questionable observations before leaving the site. Repeat measurements remain an important part of verification.

Surface, borehole, cross-hole, and water-based work require appropriate layouts and accessories. Buyers should confirm the components needed for each planned deployment rather than assume that every arrangement uses the same configuration.

Workflow Development in Geophysical Exploration

A coordinated workflow preserves the connection between field observations and interpreted results. Electrode coordinates, topography, acquisition settings, and quality records should remain traceable throughout processing.

DIGspace provides an ERT workflow that includes data review and online inversion, alongside spatial analysis and collaboration capabilities. Its desktop and web functions should be confirmed against the software package proposed for the project.

For teams working with geological, geophysical, and drilling information, a shared spatial environment can support comparison and interpretation. Displaying several datasets together should not automatically be described as joint inversion.

Data exchange also requires more than a list of file extensions. Buyers should test representative imports and exports, checking that coordinates, units, electrode definitions, and quality information are preserved.

Remote projects should establish connectivity requirements, offline arrangements, and responsibility for reviewing incoming data.

Company Value: Documented Practice and Project Support

Geomative supplies field instruments, accessories, and subsurface data software. The practical value of an integrated proposal depends on how clearly it defines the complete configuration, processing workflow, training, and support.

Published cases provide useful method references when their equipment and verification are identified.

Geomative’s Brazil gold exploration case describes resistivity and IP investigation using a GD-10 instrument to examine potential mineralization targets. It should not be presented as a GD-22 deployment or as independent confirmation of a mineral resource.

The Beishan lead-zinc mine case concerns GT-30 transient electromagnetic work. Geomative reports subsequent exposure verification of the interpreted targets. That result remains specific to the method and conditions described in the case.

Neither reference establishes GD-22 performance at another site. For a new project, request examples with comparable geology and survey objectives, together with available raw data and follow-up verification.

Accessories should also be specified individually. Compatibility, electrical ratings, quantities, and intended operating modes belong in the quotation.

Recommendations for Industry Decision-Makers

Start a GD-22 evaluation with a brief describing the target depth range, approximate dimensions, expected physical-property contrasts, survey layout, and field constraints.

Ask the supplier to demonstrate the proposed configuration on a representative test line. Review original observations, repeatability, acquisition time, and the complete transfer into processing software.

Confirm the software modules, data ownership, export requirements, training, and technical support included. Where model parameters or geological constraints are used, preserve their settings and the reasons for changes.

The GD-22 can be evaluated as part of a resistivity and IP workflow for prioritizing exploration targets. Drilling, sampling, or other appropriate evidence is still needed to establish the geological significance of the anomalies and support resource evaluation.

https://www.geomative.com/
Geomative Co., Ltd.

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