Geophysical Tools

Land Geophysics

• Ground Penetrating Radar - Low and high frequency systems
• Time and Frequency Domain Electromagnetics
• Electrical Imaging
• Conventional DC Resistivity
• Self Potential
• Leak Location Systems
• Gravity and Microgravity
• Magnetometry and Gradiometry
• Seismic Refraction and Reflection
• Earthquake Monitoring
• Acoustic Monitoring

Marine, Lake and River Geophysics

• Single or Multibeam Echosounder
• Single and Multichannel Reflection
• Sub-bottom Chirp Sonar
• Side-scan Sonar
• Magnetometry, SP and Resistivity
• Seismic Refraction
• GPS and Lasar Positioning
• Ground Penetrating Radar
• Underwater Video
• Surface Sediment Sampling
• Hydrojet Probing
• Gravity and Piston Coring
• Vibratory Coring

Borehole Geophysics

• Lithologic/Stratigraphic correlation in single or multiple borholes
• Fracture zone identification for groundwater supply or groundwater monitoring
• Well conditions, including well completion/condition and video inspection
• Hydrogeologic testing for aquifer properties (gradients, flow, porosity, fracture permeability)
• Material properties, such as shear wave velocity, porosity, density and fluid properties (chemical/physical)
• Monitoring of subsurface conditions in a borehole over time
• P and S Wave surveys
• Tomographic methods using seismic or radar transducers
• Borehole camaras
• Crosshole Sonic Logging (CSL)

©1997-2007 Golder Associates
Modern geophysics in action