Impulse Brochure

FREQUENCY DOMAINOUR FREQUENCY DOMAIN SYSTEMS offer thefollowing features and advantages:> Excellent resistivity mapping capabilities.> Broadband system offering low to high frequencydata for sensitivity to weakly conductive geology.> Inphase data provides detection of perfectconductors.> Suitably-powered system with a depth penetrationof up to 100 m.> Horizontal gradiometer magnetometers on the EM bird provide for high resolution mapping ofthe magnetic field.> Recording of both coplanar and coaxial data setsat three frequencies provides for excellentgeometric interpretation of the geologic sources.> Accurate positioning of the EM system using differential GPS facilitates a more confident interpretation of the results and to plan groundfollow-up and drilling programs directly from theairborne survey results.> Recording of coaxial and coplanar data sets atmatching frequencies provide for data robustnessand a more confident interpretation.Transmitting and receiving the signals in the samecoils minimizes the effects of variable drift as is thecase when multiple coils are employed.Features> Fixed and Programmable frequencies> Spectral Integrity between frequencies> Broadband Sensitivity (330Hz to 96kHz)> High Spatial Resolution> Magnetometer and GPS on EM birdApplicationsApplications for the system range from environmentaland engineering applications to mineral exploration.Following is a partial list of applications:> Diamond Exploration> Base Metal Exploration> Precious Metal Exploration> Overburden Thickness> Pipeline Planning> Bathymetry> Geologic Mapping> Groundwater Investigations> Shallow Gas> Powerline Corridor Mapping> Engineering InvestigationsAdvanced Helicopter-borne Frequency DomainElectromagneticsFREQUENCY DOMAINInterpretive Services and Products> Apparent resistivity and depth> Discrete EM anomaly selection and classification> Numerical modeling of discrete EM anomalies> A full range of map products> Spectral analysis of frequency response> EM-derived apparent susceptibility> Sengpiel Sections or pseudo-volume> Differential Sections or pseudo-volume> Inversion Sections or pseudo-volume> General or target-specific interpretive reportingInterpretive Services and ProductsAdvanced Helicopter-borne Frequency Domain ElectromagneticsAeroquest International7687 Bath Road, Mississauga ON L4T3T1Phone +905 672 9129Toll free +866 693 9129Fax +905 672 7083Email sales@aeroquest.caWeb site www.aeroquest.caCalgary +1 403 450 9621Vancouver +1 604 676 9648Pretoria +27 12 332 3320Perth +61 8 9479 4232The AEROQUEST International Group of CompaniesImpulse GEM2AOperating frequencies:CoAxial: 870, 4,350, 21,750 HzCoPlanar: 930, 4,650, 23,250 Hz6 Programmable frequencies (330 to 96,000 Hz)for each Coaxial and CoPlanar coilsCoil OrientationVertical: CoaxialHorizontal: CoplanarTx-Rx Coil Separation: 6.5 m 5.9 mTransmitter dipole moment:15 to 200 Am2 depending on frequencies used30 to 400 Am2 depending on frequencies usedData output: Each operating frequency has in-phase and quadrature channels, calibrated in ppmOutput Sampling Rate 30 per second 30 per secondNoise Levels: Less than 5 ppm rms under normal conditionsBase-Line Drift: Less than 15 ppm per hour after initial warm-upTow Cable: 40 m 30 mSystem Size (length): 7 m 6.4 mSystem Weight 200 kg 110 kgMagnetometers: Geometrics G823A high-sensitive Cesium sensor (.001 nT) sampled @ 10 Hz