In geophysics, FTG stands for Full Tensor Gravity Gradiometry which is a method of measuring the changes in the density of the Earth’s subsurface caused by variations in geology. These measurements are taken in three dimensions to produce a detailed data set of the subsurface of the Earth.
The data produces by FTG surveys is used for many applications, especially in areas that haven’t been explored previously.
At Metatek, Full Tensor Gravity Gradiometry is one of our main services. If you have any questions about FTG measurements, surveys, or would like to discuss a project, please contact us.
FTG is a complicated topic to understand, we have simplified for this explanation but there is a lot more to it.
To understand what is under ground, an FTG survey will measure the rate of change in gravity in all directions over a pre-determined flightpath which usually forms a grid. Based on the changes in these gravitational values and after processing of the data and integration with any other datasets, an inversion of the data can be performed to provide a geological interpretation.
Metatek provides reliable equipment based on a dependable platform to undertake your survey.
The key features of our FTG instruments are;
Capture All Components of Gravity – Our gravity gradiometer systems are full tensor, thus they acquire all nine components of the gravity signal. We simultaneously acquire scalar gravity to provide the full picture.
Covering All Data Types – Metatek is uniquely able to undertake eFTG, dFTG and iFTG surveys on associated platforms, thus covering a variety of exploration scenarios. Magnetic and LiDAR datasets are simultaneously acquired. We also cover magnetic and LiDAR date deliverables.
Latest Equipment and Software– We work closely with the manufacturers and suppliers of our equipment. Our software is the industry standard, optimised with in-house improvements and additions.
Sustainable – Airborne surveying is one of the most environmentally friendly methods of exploring the subsurface of the Earth.
If you would like to discuss partnering with Metatek for your FTG exploration, contact our team today.
FTG surveys can be used for a whole range of applications in various industries. The team at Metatek have been involved in FTG surveys all over the world. See our previous projects here.
Some of the most common areas in Full Tensor Gravity Gradiometry are;
Geological Mapping – FTG can provide a detailed map of the variations of density within the subsurface. This information is used to create a geological map, which is useful for defining areas for well planning, basin screening and areas for more detailed study.
Mineral Exploration – the high-density contrasts that are measured during FTG surveys can identify the presence of mineral deposits. This information is used for determining areas for mining in previously unexplored areas.
Oil and Gas Exploration –
The interpretation of FTG and magnetic data is used to plan seismic surveys and the location of wells. Once the seismic survey is performed, the FTG and magnetic data are combined with the seismic to undertake a more complete, integrated interpretation.
Geothermal Exploration – FTG surveys can be used to identify suitable areas for geothermal exploration.
Some of the projects we have worked on in the past include
For more information about FTG and what it means, take a look at some of our other resources. Our Glossary gives an overview of all of the technical terms that are used in this field.
If you have a project and are looking for a partner, contact our team today.
