The production came at an average head grade of 6.59 grams per tonne. That was a marked improvement on the 23,846 ounces at average grade of 6.38 grams.
Cash costs came in at US$565 per ounce, moderately up on the US$539 per ounce delivered in the June quarter.
However, all-in-sustaining-costs rang in at US$973 per ounce for the September quarter, a significant improvement on the US$1,180 per ounce figure reported in June.
Recoveries were marginally improved at 94.6%.
Overall, Medusa still expects to produce between 80,000 and 90,000 ounces at all-in-sustaining costs of between US$1,050 and US$1,200 per ounce during the financial year 2017-2018.