Mincor has five resource-level gold prospects near the Widgiemooltha town-site. These are the West Oliver, Darlek, Bass South, Flinders and Hronsky prospects. These prospects are located approximately 12 km from our Miitel mine and 35 km from the town of Kambalda. The total gold resource in the Widgiemooltha area is 238,040 ounces in five prospects. West Oliver, Darlek, Bass and Flinders are situated within contiguous granted mining leases M15/48, M15/103, M15/478 and ML15/1830. Darlek, Bass and Hronsky have been mined historically by means of small pits.
Widgiemooltha resource-level projects
West Oliver Prospect
The West Oliver prospect is located 1.5 km west of Widgiemooltha. Historic RC drilling at West Oliver by Resolute Mining Ltd (Resolute) and WMC Resources Ltd (WMC) confirmed a mineralised gold trend with mineralisation in steeply dipping and north-easterly trending, quartz bearing shear zones within a basalt host. These orebodies sub-crop at surface and were exploited by a number of artisanal shafts.
The Mineral Resource for West Oliver currently stands at 33,130 ounces of gold. Further technical details are provided in Mincor’s ASX releases dated 5 May 2016 (click here) and 26 April 2017 (click here).
The Darlek pit is located 1.5 km west of the Widgiemooltha town-site and is believed to be on the same mineralised trend that hosts the Bass and West Oliver resources.
The Darlek pit was mined by Resolute from September 1999 to January 2000, with the ore processed at the Chalice Mill. Total gold production was 96,303 tonnes @ 2.5 g/t for 7,738 ounces, using a 1.3 g/t cut-off. Due to poor grade reconciliation and the low gold price at the time (A$475/ounce to A$500/ounce), mining was suspended and as a consequence the pit floor remains approximately 32 metres above its designed depth. The Darlek pit is currently dry and in good condition with minimal remediation required for the re-establishment of mining operations.
Historical RC drilling conducted by Resolute and WMC at Darlek, both around and beneath the pit, confirmed the presence of gold-bearing north-westerly trending sheeted quartz-veins in shear zones in basalt. Based on this historical drilling, Mincor has estimated a Resource of 881,960 tonnes @ 1.9 g/t for 52,430 ounces of gold, using a 0.5 g/t cut-off.
Mineralisation is hosted within flat-lying quartz veins in basalt and interflow sediments. The Darlek resource occurs as 27 discrete sub-parallel shear zones and one flat-lying zone.
The Flinders prospect is located 2 km northwest of the Widgiemooltha town-site. Historical RC drilling by Resolute and WMC confirmed the presence of gold-bearing sheeted quartz-vein shear zones in basalt.
Based on this historical drilling, Mincor has estimated a Resource of 1,282,240 tonnes @ 1.7 g/t for 69,340 ounces of gold, using a 0.5 g/t cut-off. Mineralisation is hosted within shallow dipping sheeted quartz-veins in basalt and interflow sediments. The Flinders resource occurs as 27 discrete sub-parallel shear zones and two sub-vertical zones.
While the drill density is similar to that at Darlek over its central portion, the geological interpretation is less robust, and for this reason the entire resource has been classified as Inferred.
Flinders is open to the north towards the Nottingham Castle historical workings and to the south towards West Oliver. Further details on the resource estimation process are in Mincor’s ASX releases dated 2 June 2016 (click here) and 26 April 2017 (click here).
The Bass project is located 1.5 km south of Widgiemooltha. The prospect is an extension of the mineralised trend from the Bass pit, which was previously mined by Resolute, produced 7,150 ounces of gold. RC drilling outside the pit by Resolute and WMC confirmed the presence of near-surface gold within north-westerly trending quartz-bearing shear zones in basalt.
Based on this historical drilling, Mincor has estimated a Resource of 730,390 tonnes @ 2.1 g/t for 49,010 ounces of gold, using a 0.5 g/t cut-off.
Mineralisation is hosted within flat-lying quartz veins in basalt and interflow sediments within the pit and plunged 40 degrees to the northwest. Away from the pit, the sub-vertical Bass Shear is the main control. The resource as reported lies wholly within Mincor’s tenement but continues to the lease boundary, which may affect the recovery of a portion of the mineralisation.
The resource is currently classified as Inferred and Indicated on the basis of drill-hole spacing and reconciliation to the mined-out pit. Further technical details are provided in Mincor’s ASX releases dated 5 May 2016 (click here) and 26 April 2017 (click here).
The Hronsky project is located 1 km west of Widgiemooltha on P15/5262. The deposit was mined by Amalg in 1995 in a small confined tenement holding, producing 1,450 ounces of gold. Mincor purchased the tenement in 2014.
RC drilling at the Hronsky project has confirmed the presence of a near-surface mineralised gold trend within north-westerly trending quartz-bearing shear zones within a basalt host. Based on historical drilling, Mincor has estimated a Resource of 462,680 tonnes @ 2.3 g/t for 34,120 ounces of gold using a 0.5 g/t cut-off.
The orebodies sub-crop at surface and the trend is outlined by a number of historical artisanal pits and within the pit mined by Amalg. They occur in a zone 10 metres wide, but individual lens are 1 to 5 metres wide. The maximum length is 900 metres and they have been drill tested to 150 metres depth but are still open in several directions. The Hronsky resource occurs in four discrete subparallel shear zones. Further technical details are provided in Mincor’s ASX release dated 10 March 2016 (click here).