Brantax - engineering survey

underwater, underground
and surface investigation

Microgravimetry

The gravimetry method is useful wherever the formations of interest have densities that are appreciably different from those of surrounding formations. It is an effective means of mapping sedimentary basins where the basement rocks have a consistently higher density than the sediments. It is also suitable for locating and mapping salt bodies because of the generally low density of salt compared with that of surrounding formations. Occasionally it can be used for groundwater studies and for direct detection of heavy minerals such as chromites.

Gravimetry measurements are routinely made in conjunction with marine seismic work and are used as a minor supplement. Gravimetric investigations find a wide application in engineering geophysics is often used for mapping and detection of underground voids, tombs, the archeological sites, tunnels, burial, etc. inhomogeneities.

Microgravimetry application:

  • Bedrock depth
  • Investigations diapire
  • Identification of fractures in the bedrock
  • Mapping of sand and gravel deposits
  • Detection of septic systems
  • Mapping and detection cave
  • Deposits filling
  • Determination of the sliding plane
  • Investigations on displacements
  • Detection of voids and cavities