Ground magnetic survey + VLF
Where
Magnetic survey is typically used for mapping magnetic ores and researching bedrock structures. The VLF method is particularly suitable for mapping brittle bedrock structures (e.g. fracture zones).
Advantages
By using magnetic + VLF survey, with the same measurement it is possible to register the magnetic properties of the target area and with the VLF it is possible to map the most significant brittle structures of the bedrock. Often, the combined mapping of these features provides direct information to support the planning of diamond drilling, because many ores are connected to the local fracture zones or the zones outline the ore.
Surveys
The magnetic survey is carried out on pre-planned lines from point to point as a continuous survey. The VLF survey is performed on the same lines, with the same equipment at the defined point interval at the same time. In the method, one magnetometer is used as a fixed base station and the other magnetometer+VLF equipment is moved along the lines like a regular magnetometer by foot or skiing.
Equipment
The used equipment is GemSys GSM-19W+VLF unit and a GemSys GSM-19W magnetometer as a base station.
In VLF only international VLF stations can be used or the TX27 mobile VLF-transmitter can be used to amplify the signal. The usage of a mobile TX27 transmitter also enables the planning of a more versatile line geometry than only using international VLF stations.
Data
Client will always receive quality assessed raw data from the surveys. Additionally, we provide the data processing and interpretation of the results. Reporting according to request and introduction to the survey results will be done as requested.
The magnetic results: Magnetic profiles, maps and 3D models are created as requested.
The VLF results: the real and imaginary components of the secondary field at each point. Typically, the results are presented as a line profile. The conductivity distribution (classification of conductivity based on Re / Im ratio), as well as the thickness of the conductive object (in the linear direction) and the dip can be interpreted.
