World Class Gravity®
FTG uses one of the most sophisticated instruments ever developed to measure changes in the earth's gravity field. Data from these instruments combined with the knowledge and experience of Bell Geospace's acquisition and processing specialists, allow Bell Geospace to image density features within the earth in much greater detail than typical airborne and ship borne gravity surveys. (View a comparison of Air-FTG® with Airborne Gravity data from Northern Territory, Australia...) When compared to ground surveys, large areas can be surveyed quickly and economically.
FTG is an abbreviation for Full Tensor Gravity. Using the FTG acquisition system, Bell Geospace measures minute changes (gradients) of the earth's gravity caused by density differences in the local geology. When combined with known geologic information and other kinds of data, FTG data is used to interpret geological structures and / or resource deposits.(View a comparison of gravity data with FTG data from a standard example...)
The FTG system accurately measures extremely small changes in subsurface densities in all directions at prospect level resolution. Both the gravitational field and its gradient can be directly related to geological structures and anomalous densities such as salt, massive sulfides, kimberlites, faults, etc. Five independent tensor measurements are measured providing both qualifiable and quantifiable physical data. When used in conjunction with other geological and geophysical data, FTG technology helps to determine and confirm the geometry of geologic structures well before drilling.(Understand what you can image using the 5 independant tensor components...)