A total of 473 RC aircore drill holes were completed in mid-December and results from the first 181 holes have demonstrated heavy mineral concentrations between 3.2% - 7.6% total heavy mineral (THM) down to 9 metres beneath the more than 8-kilometre-long Domain Two mineral resource zone.
TSL managing director Dr James Searle said: “These initial RC aircore results are extremely encouraging as they demonstrate the major depth potential to greatly increase the previously reported surface-exposed mineralisation on the Mannar Island Project.”
Further results from the remaining 292 RC aircore holes are being analysed and will be reported as they are received over the next few weeks.
Potential resource upgrade
TSL previously reported visual logging of the drilling indicated that almost all holes contained significant concentrations of heavy minerals all the way to the target depth of 12 metres.
This is below the limit of accurate sampling of the RC holes to date and reveals the potential for a major resource upgrade.
On January 28, the company defined a substantial high-grade inferred and indicated heavy mineral resource of 90.03 million tonnes at 6.60% THM, including 32.35 million tonnes at 7.56% THM on tenure to be acquired subject to shareholder approval on February 21, 2020.
A further drill program of sonic core drilling is planned to sample in water-prone materials and will provide accurate samples for the RC aircore drilling.
TSL aims to release the upgraded resource report once all assay results have been compiled.
The company also anticipates that the project scoping study will be completed in the current quarter.