Projects

mt rawdon

  • Ownership
    100%
  • Location
    75km south west of Bundaberg, Queensland, Australia
  • Planned commencement date
    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 30 June 2011)
    36.7Mt @ 0.87g/t gold and 2.4g/t silver for 1.0Moz gold and 2.8Moz silver
  • Ore Reserves (as at 30 June 2011)
    32.0Mt @ 0.89g/t gold and 2.46g/t silver for 0.9Moz gold and 2.5Moz silver
  • Mining Method
    Open pit
  • Gold Production
    FY2010A 100,673 ounces
    FY2011A 89,636 ounces
    FY2012F 90,000 to 105,000 ounces
    FY2013F 95,000 to 100,000 ounces
  • Processing Method
    Conventional crush-grind-CIL to produce gold-silver dore
  • Nominal treatment rate
    3.5Mtpa
  • Forecast mine life
    8 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 forms a roughly ovoid zone of 200 metres x 300 metres at gold grades greater than 0.7g/t gold. The mineralisation takes the form of fine disseminated pyrite within the host rocks as well as more discrete sulphide veinlets. Gold grade generally increases as pyrite alteration and sulphide veining increase. The host volcaniclastic rocks strike northeast and have a shallow to moderate dip to the southwest.
  • Mining
    The operation mines a single open pit using conventional open pit mining methods of drill, blast, load and haul, using a local mining contractor. Total annual material movements are currently 7.2Mbcm and the operation is scheduled to continue until FY2020 at current estimates. The strip ratio is ~1.2: 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%.

 


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