Tasman Resources is planning to conduct electromagnetic (EM) surveying over the two most prospective target areas for IOCG mineralisation at its Pernatty project, approximately 20 kilometres SSE of the Carrapateena mine in central South Australia.
|Map showing the location of the Pernatty Project. ©Tasman Resources.|
These areas were highlighted in the most recent geophysical modelling of aeromagnetic and detailed gravity data collected by Tasman. Tasman is awaiting confirmation of the start date of this EM surveying from the geophysical contractor, and also advice from the Native Title holders regarding heritage clearance.
The Pernatty targets are situated within an interpreted prospective ‘corridor’, which also contains IOCG deposits at Olympic Dam, Wirrda – BHP’s recent Oak Dam West discovery and Oz Mineral’s deposits at Carrapateena, Fremantle Doctor and Khamsin.
Recent studies show the residual gravity response at Pernatty, and highlight a number of distinctive anomalies. Combined modelling of this gravity data with existing magnetics has defined a number of potential IOCG target areas at possibly relatively shallow depths.
Within each of these target areas a number of specific bodies of interest have been identified, and these can be summarised as Target Area A, with seven bodies modelled at depths between 200 metres and 400 metres, with SGs (densities) between 2.90 and 3.23; and Target Area B, with three bodies modelled at depths between 350 metres and 550 metres, with SGs (densities) between 2.90 and 3.05.
Greg Solomon, Executive Chairman, Tasman Resources said that the company hopes that the EM surveys provide support data to assist the siting of a number of drill holes to test the IOCG identified in the previous geophysical surveys.
“The EM may highlight anomalous areas of electrical conductivity in the basement which could be due to sulphide mineralisation, as well as information about basement depth,” said Mr Solomon.
“If positive, Tasman intends to conduct test drilling later in the year.”