OnShore

Geosurveys' mission is to provide geophysical solutions using cutting-edge technology. We strive for the right combination of youth, technical excellence and experience, with the ability to choose tools that are tailored to the client's needs.

Georadar is a geophysical method based on the propagation of high frequency electromagnetic waves (25MHz to 2GHz).

It has applicability in several areas, and is usually used in tasks related to:

• Geometric characterization of rock masses

• Geometric characterization of unconsolidated rocks

• Determination of secondary deposits (paleochannels, and others)

• Non-destructive inspection (concrete, frames, pipes, and others)

• Location of buried structures (deposits, and others)

• Mapping and assessment of infrastructures and underground voids

• Contamination plume detection

• Inspection and characterization of roads and railways

Electrical resistivity and induced polarization (IP) are geophysical prospecting methods based on measuring the electrical properties of geological formations. Geosurveys use 2D and 3D configurations, reaching investigation depths of up to 1000m (with special configurations).

These methodologies were applied, with proven success in:

• Construction

• Mining industry

• Hydrogeology

• Monitoring and inspection

• Others

Among the various methods, the following stand out:

• Wenner and Gradient Configuration, Schlumberger, Dipole-Dipole, Pole-Pole, Pole-Dipole, Multigradient, among other geometries

• Vertical electrical soundings (1D VES)

• Polar and dipolar tomography (2D and 3D)

• Mapping the spontaneous potential

• Induced polarization/metallic factor (2D and 3D)

The application areas of high-resolution refraction seismic and MASW techniques are vast and we can offer solutions for:

• Civil construction and geotechnics with high resolution information at depths of up to 200m. Tailor-made solutions for ripability studies on roads or railways, studies for the design of foundations of large structures (dams, bridges)

• Mining industry – Geological, geophysical, stratigraphic and structural definition of rocky bodies, faults, massifs, and others

MASW/MAM techniques also allow:

• Velocity models (S waves) 1D and 2D, and Vs30 site characterization

• Estimation of P-wave velocity models

• Shear modulus (G0)

• Poisson coefficient

• Density (estimated)

• Vp/Vs

• Young's Modulus

Geosurveys has technicians and equipment to carry out analyzes of temperature variations, whether by characterizing the thermal conductivity of materials, or by thermographic cameras, for remote detection of different bodies.

Geosurveys also has technology to carry out temporal evolution studies and determine thermal gradients (heating rates or cooling rates).

For mapping magnetic anomalies (resource mapping, identification of UXO's or others), Geosurveys has advanced techniques in:

• Classical magnetometry

• Gradiometry

• Transient electromagnetic induction

These methodologies have applicability in various fields (construction, mining industry, and others)