WE SPECIALISE IN ELECTRICAL SURVEYS


 

Resistivity / IP surveys are ideal to map disseminated sulphides commonly associated with gold mineralisations. Fully integrated Electric Resistivity Imaging (ERI) surveys are popular due to their lower cost and portability. Modern systems have output power and detection limits to investigate to depths in excess of 100m.

ERI are highly suited to map seepage, contaminations plumes and saline fluids due to their low resistivity. The effective and fully autonomous acquisition ensures high resolution results at a competitive cost.

PGC Geophysics provides water exploration and water bore siting under the name of Oasis Groundwater, a cooperation with Modern Mag. Oasis Groundwater specialises in mapping of aquifers using ground magnetics, VLF and ERI. 

WE SPECIALISE IN ELECTRICAL SURVEYS

OUR SURVEY EQUIPMENT

PGC Geophysics owns and operates electrical survey instruments and is available to mobilise via road or air. PGC Geophysics has a crew and is also available to train a local crew.

Resistivity surveys are an excellent tool to detect variations in soil and rock resistivities and have the ability to detect features from shallow to a great depth. In geotechnical applications, anomalous resistivities mainly originate from pore media, eg. electrolytes and/or clay, and not from the solid material,  rocks and gravel, as they are comparatively too resistive; the results are measures of soil moisture and clay/weathering.

PGC's conductivity mapper EM34 is a two-person instrument that measures the average conductivity of the sub-soil. The coils are connected by a cable of 10m, 20m or 40m length, setting the nominal depth sensitivity. A typical production rate is ~4km/day. Due to its low cost and high production rate, the EM34 is suitable to quickly scan larger areas to find locations to investigate in 2D/3D.

ABOUT PGC GEOPHYSICS

PGC Geophysics specialises in mapping and investigating the upper 100m sub-surface with electric and electromagnetic (EM) geophysical surveys. Resistivity and EM surveys are non-invasive and are excellent tools to detect variations in soil and rock resistivities. In geotechnical applications, anomalous resistivities mainly originate from pore media, eg. electrolytes and/or clay, as solid material, rocks and gravel, are too resistive in comparison - measures soil moisture and clay/weathering. Electric surveys, Electric Resistivity Imaging (ERI) and Electric Resistivity Tomography (ERT) are excellent tools for detecting and mapping: • Seepage and contamination plumes • Faults, shears and alteration • Disseminated sulphides • Water exploration and sighting water bores • Soil and groundwater salinity • Clay/fresh water boundaries • Seawater ingress. PGC Geophysics is available for managing, QC and interpreting surveys in remote locations or re-processing existing surveys.