Owner Minera Alamos still eyeing mining start despite pandemic shutdown in 2020.
Laboratory is equipped with state-of-the-art mineral analysing equipment.
First gold expected in early 2023
Project expected to save Gold Fields US$7.4 milion in energy costs over the next decade.
Agreement gives company full funding for Ecuador facility.
Gross mine contributes over a quarter of Nordgold's overall gold output.
'Green' certificate is given to mines that minimise adverse impacts on the environment.
Stibnite has suffered from elevated levels of arsenic and antimony for decades.
Agnew was the first mine in Australia to integrate large-scale wind energy.
Expansion expected to maintain current workforce and full production activities until 2033.
Decision had been expected after a maiden resource was reported last month
Announcement comes almost a year after first gold pour at the operation.