Duketon Mining holds approximately 1800 square kilometres of tenure within the highly prospective Duketon Greenstone Belt, north of Laverton in the Eastern Goldfields mineral province.
The belt has been explored for both gold and nickel since the late 1800’s and total discoveries of this belt stand at over 71,000 tonnes of nickel and 8 Million ounces of gold.
Duketon’s tenement package lies along strike and adjacent to Regis Resources’ landholding including the Rosemont, Garden Well and Moolart Well Gold Mines.
The Bulge Ultramafic Complex, a folded and thickened sequence of ultramafic, is host to the Rosie and C2 nickel sulphide resources and the Nariz discovery.
Prior to the South Boulder Mines Ltd / Independence Group NL JV only sporadic exploration for nickel had been completed in the Belt, mainly in the 1960’s and 1970’s.
The Rosie Deposit was discovered in 2006 by IGO-STB JV. Mineralisation is characterised by massive, matrix, breccia and disseminated Ni-Cu-PGE magmatic sulphides and the basal contact of the komatiite ultramafic flow.
JORC 2012 Inferred and Indicated Mineral Resource of 1.94Mt @ 1.7% Ni for 33,000T Ni, 7,760T Cu and 118,000oz Pt+Pd.
Discovered in 2006 by IGO-STB JV. The C2 deposit consists of a series of disseminated, blebby and matrix sulphide zones within and proximal to the contacts of the ultramafic complex. Three broad zones of mineralisation have been interpreted. JORC 2012 Mineral Resource estimate is 38,000t Nickel, 2370t Copper and 26,000oz Platinum and Palladium. C2 is open at depth and along strike.
The Nariz Prospect was discovered by Duketon Mining in 2014. The Maiden drillhole intersected 5.65m of massive sulphides at 7.09% Ni, 0.5% Cu and 3.76 g/t Pt+Pd within a broader intersection of 9.22m @ 4.96% Ni, 0.41% Cu and 2.41 g/t Pt+Pd (DKMDD0005)
Further intersections include:
3.73m @ 2.04% Ni, 0.54% Cu, 1.91 g/t Pd+Pt and 1.51m @ 1.01% Ni, 0.11% Cu, 2.65 g/t Pd+Pt (DKMDD006)
2.0m @ 2.1% Ni, 0.4% Cu and 0.7g/t Pt+Pd (DKMDD008)
1.2m @ 1.2% Ni, 0.3% Cu and 0.6g/t Pt+Pd (DKMDD009)
Duketon Greenstone Belt is located within the Eastern Goldfields Superterrane, and is host to world class endowments of gold and komatiite hosted nickel sulphide.
Gold exploration in the Duketon Belt, highly prospective, over 8Moz of gold has been discovered in the belt.
Duketon Mining has numerous gold prospects within the Belt, the most advanced being Golden Star, Thompson Bore and Lancefield North.
Mineralisation at Golden Star occurs as several stacked lenses within a sequence of foliated sheet like gabbroic intrusive units and is associated with quartz veining and sulphide alteration between two strike parallel shear zones. The Prospect is along the same geological trend as the Rosemont Mine (Regis Resources).
Significant intersections include:
50m @ 1.6g/t Au incl. 17m @ 3.8g/t Au and further downhole 16m @ 2.3g/t Au
incl. 8m @ 4.3g/t Au (DKRC0120)
26m @ 1.6g/t Au incl 5m @ 6.3g/t Au (DKRC0121)
20m @ 0.9g/t Au incl. 1m @ 9.4g/t Au (DKRC0107)
28m @ 1.0 g/t Au incl. 4m @ 4.7 g/t Au (DKRC0104)
20m @ 1.1 g/t Au incl. 8m @ 2.2 g/t Au (DKRC0102)
The mineralised zone extends for approximately 600 metres and remains open down dip. High grades up to 47.9 g/t Au have been intersected.
Gold was first identified at Thompson Bore in the early 1990’s as a lag anomaly. The mineralisation is located along the western limb of folded stratigraphy and is proximal to NW and north trending structures.
The gold is associated with hydrothermally altered siliceous banded iron formations with quartz-pyrite veining.
Significant intersections include:
17m @1.4g/t Au incl. 8m @2.8g/t Au (DKRC0112)
47m @1.3 g/t Au incl. 8m @4.6 g/t Au (DKRC0088)
8m @ 7.6 g/t Au incl. 1m @ 59.3 g/t Au (STBTBAC009)
17m @ 5.8 g/t Au incl. 11m @ 8.8 g/t Au (STBTBAC010)
13m @ 2.9 g/t Au incl. 4m @ 8.6 g/t Au (DKMRC010)
15m @ 1.5 g/t Au incl. 6m @ 3.0g/t Au (DKMRC018)
6m @ 3.6 g/t Au incl. 2m @ 10.4 g/t Au (DTBRC002)
7m @ 1.4 g/t Au incl. 4m @ 2.4 g/t Au (DTBRC007)
The Maiden JORC 2012 Resource of 1.9Mt @ 1.5 g/t Au for 96,000 Oz Au was announced in early 2018. The Lancefield North resource is open along strike and down plunge. Cyanide leach check assays confirm the gold is leachable. The Lancefield North Prospect is located approximately 5km north of the historical Lancefield Mine (circa. +1Moz).
Gold mineralisation is associated with a series of stacked shears within a package of meta-basalts with minor sediment layers. Quartz-carbonate-sulphide veining and intense alteration is associated with these shear zones.
Mineral resource estimate (0.5g/t Au cut-off, all inferred)
The Commonwealth Prospect, located 10km west of Regis Resources' Moolart Well mine, was first defined by a 3km x 1.5km long +75ppb lag gold anomaly with peak values of over 1 g/t Au. Aircore and RC drilling of the anomaly has intersected results including:
- 8m @1.3g/t Au incl. 4m @1.2g/t Au (DKAC0385)
- 18m @ 0.5 g/t Au incl. 3m @ 1.4 g/t Au (DKAC0381)
- 6m @ 3.0 g/t Au (DKAC0385)
- 4m @ 4.1g/t Au (RRLCMAC024)
- 4m @ 2.1 g/t Au (RRLCMAC027)