Millennium had guided all year that the 100,000ozpa run-rate would be reached in the December quarter.
However, the Nullagine operation in the Pilbara has outperformed.
Over the past two weeks, daily production from Nullagine has averaged around400oz per day, which included record daily production of 540oz of gold on August 30.
The company has recently brought Nullagine's first underground mine, Bartons, into production, boosting the average head grade.
The first high-grade stoping ore from Bartons will be delivered to the mill in the December quarter, three months ahead of schedule.
Millennium has also experienced higher grades from the Golden Eagle pit, increased mining rates from a monthly average of 400,000 bank cubic metres for the first h...