archaeological geophysics
DESCRIPTION
TerraDat is a UK based specialist geophysical ground exploration company that operates worldwide. Geophysical surveys provides a rapid, non-invasive ground investigation tool that has many applications ranging from locating buried manmade structures through to characterising geological and hydrogeological features. This TerraDat Technical Note deals with how geophysics can benefit a comprehensive understanding of the subsurface, with specific application to shallow archaeology.TRANSCRIPT
Rapid Archaeological Acquisition SystemArchaeology
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Example of finalised data - magnetic gradiometry (left) and interpretive plot (right), data canbe suppled in a variety of CAD and GIS formats
The Sensys rig can be towed by a variety ofvehicles from ATVs to tractors
TerraDat’s archaeological capability has been recently enhanced through the use of a specialist magnetic gradiometry carrier system. This system utilises eight Foerster FEREX CON 650 gradiometer probes mounted on a towed rig. Real-time, sub-centimetre accurate positioning is provided by a Trimble 5700 RTK GPS. The rig is towed across the survey area behind a 4x4 vehicle or ATV acquiring swaths of data up to 3.5m wide. The probes are spaced 0.5m apart giving twice the resolution of a conventional gradiometry survey.
In optimal field conditions, the new system allows acquisition rates of up to 40 hectares per day - significantly reducing survey costs and time over a conventional walked survey. As one of Europe’s leading environmental geophysical contractors, TerraDat’s enhanced processing and interpretation capabilities allow datasets to be further interrogated to provide information on a variety of site hazards such as shallow UXO, mine workings and buried structures and services.
Up to 40 hectares a day
Geophysical archaeo-and logical by interpretationexperienced specialists
Twice the resolution of a conventional gradiometrysurvey
Survey results provided in CAD/GIS formats
TechnicalNote
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TerraDat (UK) Ltd - Tel (08707 303050)www.terradat.co.uk
Contact Simon Hughes for more info; [email protected]
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