image of diamond

Airborne Geophysical Surveys

Cutting edge technology is key. Modern exploration techniques, including High Resolution Airborne Magnetics surveys, permits Savannah to rapidly focus resources on high potential mineral targets. Surveys are flown at 100 metre line spacing and at a very low terrain clearance of 20 metres.

To date Savannah has conducted three airborne surveys covering over 17,000 km² of our ground as outlined in the map below.

Regarding kimberlites, this technology permits us to not only locate magnetic bodies as small as 1 Ha (100 metres in diameter) but to drill them immediately should we consider them to be kimberlites.  This permits Savannah to “skip” the time consuming and costly stage of ground sampling and, at least initially, kimberlite indicator mineral analysis.

Similarly, gold and base metal deposits tend to be found in associations of structural elements which can be discerned with a great degree of confidence from this same geophysical data.  During the surveys, radiometric data is also collected which, although not specifically used for finding uranium deposits, will indicate where the apparently ubiquitous granite-gneiss background geology is absent.  Areas such as these are closely investigated to determine their geological makeup.

By way of example the Ikungu Survey shown below has assisted Savannah in identifying 66 kimberlite anomalies or targets which have, for internal purposes, been subdivided into first, second and third order priorities.

A close up of the Loya 1 Survey data shows the level of resolution and effectiveness of this technique – the two anomalies, now confirmed kimberlites, are readily apparent. Loya 1 is currently being bulk sampled. Click here to read more about bulk sampling.