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Evolution Ownership
100%

Location
150km south of Townsville, Queensland, Australia
Location on the traditional lands of the Birriah People

Local Communities
Gumlu, Home Hill, Bowen, Townsville

Year commissioned operations
Comercial production commenced July 2013

History

  • 1980: Ashton applied for EPMs over Clarke Range area, which covered Mt Carlton
  • 1990: Gold Fields Australia joint ventured into the Carpentaria Gold (MIM) tenements
  • 2002: Conquest enters into a JV agreement with Carpentaria Gold (MIM) over Mt Carlton Project
  • 2003: Conquest exercised its pre-emptive right under the JV agreement to acquire 100% of the Mt Carlton Project from Carpentaria Gold (MIM)
  • 2006: Mt Carlton discovered
  • Feb 2010: Definitive Feasibility Study completed
  • Dec 2010: Conquest Board approves A$126.9M development
  • Nov 2011: Evolution acquired 100% of Mt Carlton via Catalpa Resources and Conquest Mining merging and the concurrent acquisition of Newcrest Mining’s Cracow and Mt Rawdon gold mines
  • Dec 2012: Construction completed and commissioning commenced
  • Mar 2013: First concentrate produced
  • Apr 2013: Official mine opening
  • Jul 2013: Commenced commercial production

Style of mineralisation
High-sulphidation epithermal

Contained metals
Gold, silver, copper

Measured, Indicated and Inferred Resources (at 31 Dec 2015)
8.62Mt @ 3.19g/t gold for 885koz gold

Ore Reserves (as at 31 Dec 2015)
4.62Mt @ 4.78g/t gold for 709koz gold

Mining Method
Open pit

Gold Production
FY2014A 87,952 gold ounces
FY2015A 77,658 gold ounces
FY2016A 113,056 gold ounces

Processing Method
Crushing, grinding and bulk sulphide flotation to produce a polymetallic concentrate

Nominal treatment rate
Design capacity of 800ktpa

Geology
The Mt Carlton project is a high-sulphidation epithermal style deposit with mineralisation occurring within felsic volcanic rocks on the northern margin of the Permian Bowen Basin. The project comprises gold, silver and copper primarily as copper arsenic sulphides (enargite) and silver arsenic sulphides (tetrahedrite/polybasite) and some native gold (within pyrite).

The Mt Carlton deposit comprises two discrete zones: the large gold dominant V2 deposit and the smaller, silver rich A39 deposit. The V2 deposit is flat lying and situated 20 metres to 180 metres below surface and is 70 metres thick with a 500 metre by 500 metre areal extent. The two deposits are located 200 metres apart.

The stratigraphy in the Mt Carlton area is almost flat lying with a gentle 10 degree southerly dip. Sulphide veins dipping at moderate to steep angles to the NW host a majority of the known economic mineralisation.

Mining
Following the completion of the A39 open pit in FY14, mining production is now derived solely from the V2 open pit, utilising conventional drill and blast, load and haul methodologies. Evolution transitioned to owner-miner in 2015.

The V2 pit will have a life-of-mine strip ratio of 2.7:1 and will be mined over nine years. The low-grade ore will be stockpiled and processed after depletion of the high-grade ore, to be processed post completion of open pit mining.

Processing
Ore is processed via conventional technology, consisting of crushing, grinding and flotation to produce a polymetallic concentrate.

Fact Sheet
Mt Carlton fact sheet – updated November 2016