Ground Magnetic Surveying for Archeology, Forensics, and Environmental Investigations
Cordillera GeoServices Cordillera GeoServices
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 Published On Feb 18, 2021

Contact information:
person: Dr. Hector R. Hinojosa, PG
website: www.cordillerageo.com
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Remote sensing investigations are a synonym of geophysical surveying. There are numerous geophysical surveying methods — magnetometry is one of them. Magnetic surveying is a passive, non-intrusive, remote sensing technique widely used in different fields, including archeology, geological and mineral exploration, forensics investigations, environmental investigations, and engineering. The geophysical property of interest is known as "magnetic susceptibility." A magnetometer measures the magnetic field intensity or signal in nanoTeslas (nT) units.

There are three types of magnetometers: proton-precession, alkali-vapor, and fluxgate. Most magnetic surveys use proton-precession or fluxgate, which operate in stationary or moving mode. Fluxgate magnetometers measure the magnetic field in 3-directions and their magnitude. Proton-precession magnetometers and alkali-vapor magnetometers only measure the total magnetic field's intensity. High-sensitivity alkali-vapor magnetometers in single-sensor or dual-sensor mode (gradiometer) are preferred for high-precision surveys.

Cordillera Geo-Services provides geophysical and geological services to develop an understanding of your projects' near-surface settings.

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