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GRAVITY SURVEYS

The gravity method involves measuring the earth’s gravitational field at specific locations on the earth’s surface to determine the location of subsurface density variations. The gravity method works when buried objects have different masses, which are caused by the object having a greater or lesser density than the surrounding material.

 


APPLICATION of METHOD

Basen geometry
Regional geological studies
Mineral exploration
Underground voids
Faults and fractures
Depth to basement
Military studies
Locating buried archaeological structures

However, the earth’s gravitational field measured at the earth’s surface is affected also by topographic changes, the earth’s shape and rotation, and earth tides. These factors must be removed before interpreting gravity data for subsurface features. The final form of the processed gravity data can be used in many types of engineering and environmental problems, including mineral exploration, determining the thickness of the surface or near-surface soil layer, changes in water table levels, and the detection of buried tunnels, caves, sinkholes and near-surface faults.