Nickel mineralisation at the Sinclair deposit continues down-plunge beyond the current underground mine infrastructure and has been confirmed in drilling for a further 1km along strike from the end of actual mining development.
The first 350m of this continuation has been drilled more intensely than the remaining 790m of strike which has been drilled on a 100-200m spacing.
Geological modelling is in progress to understand the spacing required to enable this mineralisation to be classified as a JORC Resource. Modelling is also in progress to understand the extent and mineability of any remnant mineralisation that may be coincident with the previously-mined areas of the Sinclair deposit.
Significant intersections of nickel sulphide mineralisation beyond the current mine development include:
- CWD381: 4.35m @ 2.38% Ni
- CWD381B: 14.95m @ 1.64% Ni (including 5.63m @ 2.64% Ni)
- CWD545A: 18.44m @ 1.74% Ni (including 9.33m @ 2.31% Ni)
- CWD535B: 6.34m @ 3.32% Ni
- CWD546C: 9.30m @ 2.77% Ni
There is a strong correlation between down-hole electromagnetic (DHEM) responses and nickel sulphide mineralisation at Sinclair, demonstrating that EM is an effective tool in identifying potential massive nickel sulphides. Multiple DHEM plates within the Sinclair deposit extension support the continuity of the mineralisation and the potential to identify additional mineralisation down-plunge and along strike from the existing mineral inventory.
Sinclair Nickel deposit longitudinal projection with mine development showing mineralised Ni drill intercepts greater than 2% Ni beyond the limit of existing mine development
The Sinclair Project also offers outstanding near-mine exploration potential along two additional mineralised ultramafic channels at the Skye and Stirling Prospects which have been identified to the south and trend underneath and parallel to the main Sinclair ore body. Significantly, both occur within an ultramafic rock type similar in style to the Sinclair ultramafic, but at much greater volumes.
The Skye and Stirling mineralisation shows similarities to the Sinclair orebody and the two emerging channels are associated with at least two basal positions along a complexly folded high-MgO (magnesium oxide) ultramafic body. Both prospects have been drilled on a 50m x 20m pattern at their near-surface positions, but are largely untested down-plunge and to the north beneath Sinclair
These two nickel sulphide bearing channels show good down-plunge continuity and several late time EM conductors remain to be tested for thicker and/or higher grade mineralisation beneath the Sinclair deposit. These target areas represent the main exploration opportunity at the near-mine Skye and Stirling Prospects.
Mineralisation at Sinclair is known to pinch and swell; therefore, if these EM conductors are as extensive as their size and conductivity indicate, they could represent new nickel sulphide orebodies proximal to the existing Sinclair mine infrastructure. Given that positions up-plunge and to the south of these EM conductors are known to carry massive nickel sulphide mineralisation, these EM targets present as highly prospective exploration targets.
Three-dimensional geological modelling and the re-processing and assessment of historical electromagnetic data undertaken by Talisman with the assistance of expert consultants has both confirmed existing EM targets and identified a number of new targets that support the continuation of massive nickel sulphides along both the Stirling and Skye basal contacts, and confirm the highly prospective nature of the near-mine environment.
Talisman is developing potential drill programs to test the highest priority EM drill targets in optimal geological positions along the Stirling and Skye mineralised channels.
Talisman is progressively assessing the development potential of the Sinclair deposit as part of its exploration strategy.