Gravity surveys measure the changes of rock density by looking at changes in gravity caused by geological structures. State-of-the-art gravity meters can sense differences in the acceleration (pull) of gravity to one part in one billion. Measurements taken at the Earth’s surface express the acceleration of gravity of the total mass of the Earth but because of their high sensitivity the instruments can detect mass variations in the crustal geology. The amplitude of the variation from the high to the low of the gravity gradient zone is a function of the displacement on the fault. In addition to providing insights to fault problems, gravity methodology applies to any geologic problem involving mass variations. The common applications of gravity survey are:

  • Mineral Exploration - massive sulphides, porphyry's structure
  • Diamond Exploration - Kimberlitic pipes
  • Coal Exploration - basin structure, grabens, large faults
  • Petroleum - frontier basin mapping, diapirs
  • Locating void(s) in Karst Topography
  • Engineering, tunneling, footings


Ground Gravity Systems
  • LaCoste& Romberg Model G Aliod1000
  • LaCoste& Romberg Model G Land meter