The TERRAVISION-LOZA is a high powered mono-pulse system that has the following features which deliver great benefits in both time and cost for our clients in the geological exploration sector.
- Detailed profiling and 3D mapping up to 200-270 m below surface.
- Non-invasive and no permanent environmental impact so minimizes any local objection.
- Rapid and easy deployment of light weight equipment and small survey team of usually 2 specialists.
- Real-time data processing allows to adjust the planned profiles and optimizes work programme
- Data analysis by proprietary patented software on site or at data centre (clients' or ours).
- Quick mapping of target area with minimal preparation of the terrain. Team need to be able to walk in broadly straight lines.
The resulting mapping provide an unrivaled view of the sub-surface and if calibrated off a core sample a clearly delineated model from which you can plan a cost effective drilling programme to achieve an early competent persons or 43-101 report earlier and without wasted drilling dollars.
Where does TERRAAVISION-LOZA fit in the range of geophysical exploration methods?
Geophysical methods such as gravimetric and geomagnetic, in various modifications, are widely used in the search of deposits, accompanied by deep geochemical survey and exploration drilling.
Geophysical methods historically give very indeterminate results in areas with for example:
- Complex geology,
- Multi-zoned areas,
- Disturbed or loose overburden in the lignites, oolitic ore horizons,
- Aquifers with highly mineralized water.
The most reliable method of deep exploration is drilling on a grid pattern but it is quite costly.
Terravision-Radar significantly improves the efficiency of “deep search.” It can be described as geophysical instrument designed to study the soil subsurface structure to a depth from a few meters to hundreds of meters, depending on the configuration of the device, the antenna and the parameters of the subsurface.
TERRAVISION-LOZA has a lot of innovations which make it different from its predecessor - ground-penetrating radar. Pulse transmitter power has been increased by a minimum of 100,000 times, and the stroboscopic transformation replaced to direct detection of signal. The antennas used by Terravision-Radar use RC-loaded dipoles. This ensures the exclusion of interference in the received signal that suppresses weak signals, whilst also permitting the reception of strong signals. The transmitter uses a high-pressure hydrogen discharge, and the transmitter operates in stand-alone mode without synchronization. This avoids the requirement for connecting lines which also introduce strong interference from the transmitter.
The mono-pulse system waveforms create a cross section radar image of the subsurface. As each shot is precisely measured this enables the resulting 3D modeling. The data for processing can be viewed in three typical representations. Colours are for contrast only to delineate structures and common features.
Waveform Derivative Mode
Actual Result of Survey of a Gold-Bearing Body
Image delineating a gold bearing body showing structures to 180 metres.
Easy to mobilize
Depending on the geological task, the removable antennas (transmitter antenna and receiver antennas) can quickly be changed, which changes the operating frequency range of the radar.
Figure 1: Terravision Radar equipment. The Radar is configured as follows:
- A Transmitting Antenna
- A Receiving Antenna
- A Transmitter
- A Receiver
- Receiving Console
- Laptop with proprietary software