Fugro Airborne Surveys :: Airborne Geophysical Surveys

By: Fugro Airborne Surveys  09-12-2011
Keywords: Airborne Geophysical, Surveys Map

Airborne geophysical surveying is a process of measuring the variation in several key physical or geochemical parameters of the earth.  The most important parameters measured are conductivity (which is the inverse of resistivity), magnetic susceptibility, density, and radioactive element concentration.  Any change in the earth's near surface that causes a measurable change in these parameters presents a potential application for airborne geophysics.

Electromagnetic surveys map the three dimensional variation in conductivity, caused by changes in mineralogy, intensity of alteration, water content or salinity.  Airborne magnetic surveys map the variation of the magnetic susceptibility, generally due to changes in the magnetite content of the rock.  Gamma-ray spectrometric surveys measure the radiation of one or more of the natural radioelements: potassium, uranium, or thorium, or a specific man-made radioelement.  Airborne gravity surveys map density variations within the earth.

Keywords: Airborne Geophysical, Surveys Map

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Other products and services from Fugro Airborne Surveys


Fugro Airborne Surveys :: Gravity Gradiometry

This advantage is backed by Fugro’s exclusivity on the best AGG technology coupled with our unique value-added processing and interpretation capabilities. FALCON is the world's first airborne gravity gradiometer and is the only operating AGG technology developed specifically for airborne purposes. It measures minute changes in the earth's gravity to high accuracy and high spatial resolution using both helicopter and fixed-wing platforms.


Fugro Airborne Surveys :: HELITEM

The high power of HELITEM, coupled with the low noise at the receiver due to its placement above and not in the centre of the transmitting loop, ensures the greatest depth of exploration possible for any AEM system. Fugro Airborne Surveys offers the HELITEM system, the world’s most powerful commercially available helicopter-borne time-domain EM system, having a transmitter dipole moment of 2.0 million A m2.


Fugro Airborne Surveys :: Airborne Gamma-Ray Spectrometry

Fugro Airborne Surveys follows the principles outlined in IAEA Technical Report 323 (Airborne Gamma-Ray Spectrometer Surveying), and in AGSO Record 2000/05 for calibration, data acquisition and processing, but uses more advanced techniques for specific aspects. Either unit can be configured with up to 67.2 litres (4096 cubic inches) of main NaI crystal detector, and up to 16.8 litres of upward looking detector volume.


Fugro Airborne Surveys :: Aeromagnetic

The magnetometers can be installed in fixed-wing aircraft or helicopters, in either "stinger" or "towed bird" configurations, and, in addition to measuring total magnetic field, can be used to make vertical, transverse and/or longitudinal gradient measurements by using two or more sensors.


Fugro Airborne Surveys :: Electromagnetic

Fugro Airborne Surveys, and its predecessor companies, has over forty years of experience in developing state-of-the-art AEM systems and conducting successful surveys. Fugro Airborne Surveys provides a complete suite of airborne electromagnetic systems, both helicopter-borne and installed on fixed-wing aircraft.