Evolution Mining

mt rawdon

Ownership
100%
Location
75km south west of Bundaberg, Queensland, Australia
Year commenced operations
2001
History
- 1998: Project acquired by Equigold NL
- 2001: Gold production commences
- 2008: Equigold NL Merger with Lihir Gold Limited
- 2010: Lihir Gold Limited Merger with Newcrest
- 2011: 1Moz gold produced since commissioning
- 2011: Evolution acquired 100% of Mt Rawdon via Catalpa Resources and Conquest Mining merging and the concurrent acquisition of Newcrest Mining's Cracow and Mt Rawdon gold mines.
Style of mineralisation
Volcaniclastic hosted
Contained metals
Gold, silver

Measured, Indicated and Inferred Resources (at 31 Dec 2012)
56.7Mt @ 0.7g/t gold for 1.3Moz gold
Ore Reserves (as at 31 Dec 2012)
39.8Mt @ 0.8g/t gold for 1.0Moz gold
Mining Method
Open pit
Gold Production
FY2010A 100,673 ounces
FY2011A 89,636 ounces
FY2012A 95,403 ounces
FY2013F 95,000 to 110,000 ounces
Processing Method
Conventional crush-grind-CIL to produce gold-silver dore
Nominal treatment rate
3.5Mtpa
Forecast mine life
10 years
Geology
The Mt Rawdon gold deposit is a massive, volcaniclastic hosted, low grade gold deposit that exhibits excellent characteristics conducive to low cost mining and treatment. The surface extent of mineralisation greater than 0.7g/t gold formed an ovoid zone 400 metres x 280 metres in diameter on the southern flanks of the original Mt Rawdon. The gold mineralisation is closely associated with fine disseminated pyrite within the host rocks as well as more discrete sulphide veinlets. Gold grade generally increases as pyrite alteration and sulphide veining increases. The principal host volcaniclastic rocks dip moderately to the southwest, as does the orebody.
Mining
Mines production is derived from a single open pit, utilising conventional drill and blast, load and haul methodologies. These functions are undertaken by separate contractors with management by Evolution staff. The operation is scheduled to continue until FY2023 at current estimates with a life-of-mine strip ratio of 2.2:1.
Processing
The processing plant consists of primary and secondary crushing, SAG and ball milling, followed by conventional cyanidation leaching. Mill throughput is maintained at ~3.5Mtpa of ore with a recovery of approximately 90%.