Production is forecast to be at the lower end of guidance and costs are forecast to be at the higher end of guidance due to issues with the spargers that inject oxygen into the leach tanks, limiting the ability to increase sulphide ore through the plant without adverse impacts to recovery.
2018 FORECAST
Tucano site personnel have made the decision to defer processing of high volumes of high grade sulphide ore until the issues with the spargers are resolved so that recoveries are not unduly impacted.
If installation of new spargers is required then CY2018 production will be at the lower end of guidance of 125,000 to 135,000 ounces and AISC will be at the higher end of guidance of US$1,000 to US$1,100 per ounce (June Quarterly Report) due to the deferral of processing stockpiled high grade sulphide ore into 2019...
Good luck guys.
Ann: Tucano Plant Upgrade and Production Update, page-3
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