Overview & Scope Land geophysics provides essential information about the subsurface conditions for geological, mining and civil engineering projects. Seismic refraction and geo-resistivity determine the thickness of the overburden and the depth of the bedrock, in addition to characterize compactness and bedrock quality. Magnetometry, electromagnetics and ground penetrating radar provide information about buried objects such as UXO’s, pipes or cables and structures. G-tec offers a complete panel of non-destructive techniques which allow a better knowledge of the field and increases the efficiency of the works. G-tec provides data acquisition, processing and interpretation for : 
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Magnetometry - Gradiometry
|  | Magnetometry is a method widely used for mining prospection. Gradiometry uses a multi-sensors layout to increase ferrous objects detection resolution. The investigations cover operations such as: - Uxo’s detection
- Pipe and cable detection
- Archeological objects detection
- Mining and quarry extension
- Geological structures mapping
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Ground penetrating radar (GPR)
|  | Ground penetrating radar method is a high resolution electromagnetic technique investigating the shallow subsurface materials and man-made structures (roads, bridges, building, etc). This cover operations such as: - Road pavement thickness control
- Buried objects detection
- Fault and fissure location
- Engineering structures inspection
- Karstic phenomena detection
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| Microgravimetry |  | Microgravity surveys identify areas of contrasting density by surface measurements of the disturbance produce by the earth’s gravitational field.
This cover operations such as: - Landfill investigation
- Karstic phenomena detection
- Cavities detection
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Geo-resistivity
|  | Resistivity method is mainly used for investigating the lithological underground structures.
This cover operations such as: - Landfills depth and thickness estimation
- Depth to bedrock
- Weathering and fracturation of a rock mass
- Overburden thickness measurement
- Contamination plumes mapping
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| Electromagnetics |  | Electromagnetic methods act as powerful ferrous and non-ferrous objects detectors.
This cover operations such as: - Uxo’s detection
- Pipe and cable detection
- Archeological purposes (objects and structures)
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Refraction seismic
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| Refraction seismic method is commonly used for the mapping of the bedrock. It is ideally suited for rippability assessment. This cover operations such as: - Depth to bedrock
- Rippability assessment
- Weathering and weakness zones in a rock mass
- Trenching and excavation works
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